Circular walk from Poundstock to Penfound
  1. From the car park, turn left on the lane and follow it past the (new) cemetery until you reach a metal kissing gate on the left into the (old) churchyard.

    Poundstock is a small village just off the A39, near the rocky cove of Millook Haven. Poundstock is a Saxon name meaning "cattle enclosure". Poundstock was a centre for smuggling and piracy from 1300 until the Black Death wiped the village out in 1348. However, smuggling and wrecking continued after the village was refounded.

    The holy well at Poundstock includes an elaborate stone well house and enclosure built in 1914. Since this was at the time when the church had been mistakenly re-dedicated to St Neot, the holy well is recorded as being associated with St Neot. Now that the church dedication has moved back to St Winwalloe then the well is sometimes associated with that saint instead. There are questions as to whether the well counts as a "true" holy well at all due to a lack of records of use before the 20th Century. What motivated the building of a well house in the woods remains a mystery.

  2. Go through the kissing gate on the left and follow the path to the church.

    Parts of the building are thought to date from the 13th and 14th Centuries with the majority including the tower dating from the 15th Century. A five year restoration project was completed in 1896 after the church was recorded as being in a "very feeble state" during the 19th Century. During the restoration, two large early 16th Century paintings were discovered beneath the limewash.

    The church was thought to be dedicated to St Neot until some 14th Century records were found showing it had originally been dedicated to St Winwalloe. The dedication was changed back to St Winwalloe in the 1970s.

  3. Turn left at the church and follow the path downhill past the gildhouse to exit onto a lane.

    Poundstock Gildhouse, located next to the church, is a well-preserved late mediaeval church house, the only surviving one of its kind in Cornwall. It has been used continuously since it was built, and is a Grade I listed building. Church houses were built with the aim of using them as extensions of the church, and the one in Poundstock is contemporary with the later phases of the mediaeval church building.

    The unique structure was built between the 15th and 16th centuries by skilled craftsmen using traditional techniques and materials such as cob, local stone and slate. In the beginning, the ground floor probably comprised a kitchen, bakehouse and brewhouse, a meeting place and a store room. The first floor was an open feasting hall where the Church Ales would have been held.

    Church Ales were celebrations held within the church calendar, particularly at Whitsuntide and May Day, when ales were brewed and sold in order to raise funds for the Church or for good causes in the parish. With the growth of Puritanism in the late 17th century, drinking was seen as sinful. Church Ales were considered to be nothing but drunken disorders and were suppressed. Church houses were gradually abandoned, demolished or put to other uses.

  4. Turn left onto the lane and follow it to a crossroads with the A39.

    The well opposite the churchyard date is recorded on 19th Century maps and the well house is thought to date from this period. The granite arch around the door is thought to have been re-used from a previous structure. Given the proximity to the church, it's possible that water from this well could have been for "holy" purposes as the recognised holy well is more inconveniently located a half-mile round-trip away in a wooded valley.

  5. Carefully cross the A39 and follow the lane a short distance to a junction on the left with a signpost indicating a cinema.
  6. Turn left at the junction just after the bus stop and follow the lane past the cinema to a dead end with a wooden stile on the right signposted as a public footpath.

    The Rebel Cinema at Treskinnick Cross was designed and built by a film producer and opened in 1988. It closed in 2007 but was reopened in 2011 and its one screen has 2 showings on weekday evenings and three at weekends. If it seems in the middle of nowhere, bear in mind the alternative for the residents of Bude is a 30 mile drive to Wadebridge!

  7. Turn right over the stile and follow the path along the right-hand hedge to an opening into the next field.

    Where an electric fence crosses a footpath, it should either be covered by an insulating sheath (e.g. on stiles) or there should be a section that unclips with insulating plastic handles to allow access through the fence. Ensure that you re-clip this on passing through so animals cannot escape. The connecting cord/spring between the handles is often conducting so avoid touching this and be aware of any dangling rucksack straps.

  8. Go through the opening and follow the track between the fence and hedge to a pair of gates at the far end.

    The trees on the left provide perches for crows to survey the landscape.

    Birds of the crow family are considered to be among the world's most intelligent animals, displaying a high learning ability and are able to use logic for solving problems. Researchers have found some crow species capable of not only tool use but also tool construction. Crows have also demonstrated the ability to distinguish individual humans apart by recognising facial features. If a crow encounters a cruel human, it can also teach other crows how to identify that individual.

  9. Go through the right of the two gates and follow the left-hand hedge to a stile.

    The idea of eating something that can sting you seems wrong until you realise that nettles lose their sting as soon as you cook them, and they taste like spinach. Nettles are extremely nutritious, containing high levels of vitamin A and C, large amounts of iron and even a significant amount of protein.

  10. Cross the stile and head to a gap between the trees roughly 10 metres from the bottom-left corner of the field.

    If there are sheep in the field and you have a dog, make sure it's securely on its lead (sheep are prone to panic and injuring themselves even if a dog is just being inquisitive). If the sheep start bleating, this means they are scared and they are liable to panic.

    If there are pregnant sheep in the field, be particularly sensitive as a scare can cause a miscarriage. If there are sheep in the field with lambs, avoid approaching them closely, making loud noises or walking between a lamb and its mother, as you may provoke the mother to defend her young.

    Sheep may look cute but if provoked they can cause serious injury (hence the verb "to ram"). Generally, the best plan is to walk quietly along the hedges and they will move away or ignore you.

  11. Go through the gap and turn left to follow the path through a gate. Continue on the track between the hedge and fence to a gate in front of a building.

    The settlement of New Mill was first recorded in 1713. Based on the map evidence, the grade-II-listed millhouse beside the farmhouse, although fairly old, is thought not to be in the location of the original mill building.

  12. Bear left (ignore the footpath to the right) to pass between the barn and the outbuilding (via a metal gate if shut) to reach a stile with a yellow spot.

    Overshot wheels can achieve higher efficiencies than undershot wheels and can operate using a smaller volume of water which explains why they were generally preferred, particularly in steep-sided Cornish valleys.

    A 2004 Civil Engineering publication concluded that high energy conversion efficiencies (of around 85-90%) were possible from overshot waterwheels and that if these can be manufactured cheaply, they could provide an environmentally sound means of small-scale electricity production.

  13. Cross the stile (or go through the gate) and follow the track to a junction where another track joins from the right.

    Primrose seeds are quite large and therefore, due to their weight, don't travel far from the plant. This causes a clump of primroses to spread out very slowly over time and means it takes a long time for primroses to colonise new areas. This makes large carpets of primroses a very good indicator of ancient woodland where they would have had many hundreds of years to spread out.

    Blackbirds are one of the most common birds in the UK with a population of somewhere between 10 and 15 million. However, blackbirds were in steady decline from the 1970s through to the mid-1990s. The population has only relatively recently recovered.

  14. At the junction, keep left and follow the track, through Tuckingmill wood and alongside a meadow, until it bends uphill and ends in a gate.

    Wild garlic grows in the shady areas alongside the track.

    If cows eat wild garlic, this flavours their milk. Whilst this is definitely not what's wanted for tea or cornflakes, the butter made from it is more useful. This means of producing garlic butter became popular in Switzerland in the 19th Century.

    Trees along the track include oak and ash.

    Ash trees can live for over 400 years and the life of the tree can be prolonged further by coppicing. Ash was traditionally coppiced to provide wood for firewood and charcoal. It is unusual in that it can be burnt green (without requiring seasoning first) as the living wood has a very low moisture content.

  15. Cross the stile next to the gate and climb the field to the waymark next to the gate in the top-left corner. Bear right to follow along the top hedge and continue to reach a gate.

    Another name for celandine is pilewort as the tubers of the plant are said to resemble piles. Based on the "doctrine of signatures" (i.e. a plant that looks a bit like something must be a cure for it), the resemblance suggested to mediaeval herbalists that celandines could be used to cure haemorrhoids. This was done by applying an ointment containing crushed celandine leaves to the relevant area. Since celandine contains a poisonous compound, some attempts to ingest celandine in an effort to cure piles have not gone too well.

    As well as attracting insects, the brightly coloured foxglove flowers serve as a warning for animals that the plants contain toxins. All parts of the plant can cause a range of ill-effects in humans from nausea to heart and kidney problems which can be fatal.

    Field mushrooms are very closely related to the familiar supermarket button mushrooms and are the most commonly-eaten wild mushroom in Britain. They usually appear in grazed fields between July and November but can be out as early as May. They can sometimes be seen growing in a ring. The gills start out pink and become brown with age and the cap is slightly downy, especially around the edges, often with a skirt left on the stem. As there are a few species of white mushroom that all look quite similar, care needs to be taken to avoid eating poisonous species.

    In particular, the common but poisonous "yellow stainer" looks very similar to a field mushroom and consequently causes the most mushroom poisonings in Britain. If the flesh is of a yellow stainer is cut or bruised, particularly at the base of the stem, a yellow liquid starts to seep out (unless the mushroom is very dried-out). This can take a few minutes to be apparent so it might not be until you get them home that you notice yellow patches where the caps have rubbed against something. The yellow stainer also has an unpleasant "chemical" smell (sometimes described as an "elastoplast smell") which helps distinguish it from the more appealing "mushroomy" smell of a field mushroom. A small minority of people have been reported as suffering no obvious ill effects from (presumably accidentally) eating yellow stainers but for the vast majority of people they cause stomach upsets which can be fairly severe including cramps, projectile voting and diarrhoea.

    Rabbits were originally from the Iberian peninsula and were brought to Britain by the Normans and kept in captivity as a source of meat and fur. Although grass is their principal natural food, rabbits are able to survive on virtually any vegetable matter and with relatively few predators, those that escaped multiplied into a sizeable wild population.

  16. Go through the gate and continue following along the left hedge to reach a stile.

    Although it's obvious that you should ensure any gates that you open, you also close, what about gates you find that are already open?

    If the gate is fully open then leave it alone as it may well be providing livestock access to a water supply, and by closing it you could end up killing them.

    If the gate is ajar or swinging loose and not wedged or tied open then it's likely that the gate was left open by accident (possibly by another group of walkers). Properly closing the offending gate behind you will not only bring joy to the landowner but you can feel good about saving lives in a car swerving to avoid a cow in the road.

    If you encounter a gate doubly-secured with twine that can be untied or a chain that can be unfastened, it's normally there because naughty animals have managed to undo the gate themselves at some point (e.g. by rubbing against the bolt), so retie/fasten it afterwards.

  17. Cross the stile and follow the path through the bushes until the path enters the stream.

    The stream is one of the tributaries of the River Neet. Some of the other tributaries stretch out to Week St Mary and Jacobstow. The main river joins the River Strat at Helebridge and then flows down to Bude. The river system provides an important habitat for trout, lampreys and eels.

    The flooded quarry pits, farm ponds and pools in small streams in Cornwall provide ideal habitats for Freshwater Eels. Freshwater Eels have such an eccentric life cycle that it was a mystery for many years. The adult eels migrate from the lakes in which they grew up, across land, down rivers and 4,000 miles across the ocean to the Caribbean where they spawn and die. The larvae then drift for 300 days in the ocean currents from the Sargasso Sea to Europe. The tiny "glass eels" then migrate up rivers and across fields to find suitable homes.

    Eels have been a popular food for centuries as their rich, oily flesh is very tasty. Due to overfishing, pollution and also changes in ocean currents, the Freshwater Eel is now a critically endangered species. Since the 1970s, the numbers of eels reaching Europe is thought to have declined by around 90% (possibly even as much as 98%). A research project has been started to breed eels in captivity. This is not straightforward as the eel is generally only able to reproduce after having swum 4,000 miles. The researchers have therefore developed an Eel Gym to help the eels find their mojo.

  18. Turn right and head a few steps downstream until you can see a path departing to the left. Follow the path along the line of the fence to a stile.

    This is another good spot for bluebells in the spring.

    In Old Cornish, both bluebells and marigolds were known as lesengoc which translates to "flower of the cuckoo". In Modern Cornish, the marigold has remained more-or-less the same but the bluebell has been changed to bleujenn an gog ("plant of the cuckoo"). The association between bluebells and cuckoos exists in Welsh ("bells of the cuckoo") and Gaelic ("cuckoo's shoe"), and in some English folk names such as Cuckoo's Boots and Cuckoo Stockings. It is thought that the association is due to the time that bluebells flower coinciding with the time that the call of the cuckoo is first heard.

    Plant nutrients like phosphates and nitrates are used to improve the fertility of soils to make crops grow well. These chemicals dissolve easily in water and can wash into rivers where they stimulate the growth of algae. This uses up the oxygen in the water, suffocating the other aquatic life.

    Phosphates are also used in many laundry and dishwashing powders. These cannot be fully removed by the sewage treatment process and the remainder is discharged into rivers, causing serious damage. You can help to reduce this by switching to low or phosphate-free dishwashing and laundry detergents (Ecover brand is particularly good and their dishwasher tablets seem to work amazingly well). Other things to be on the lookout for around the home are waste pipes that go into drains instead of sewers (these don't get any sewage treatment so any phosphates go straight into rivers). It's worth ensuring cesspits/septic tanks are emptied regularly otherwise all kinds of nasty things including phosphates will seep from these through groundwater into rivers.

  19. Cross the stile onto a track, and turn left. Follow the track to a gate.

    The older an oak tree becomes, the more acorns it produces. A 70-80 year old tree can produce thousands. Acorns are high in carbohydrates and as well as being a staple food for squirrels, they are also a really important food for deer and make up a quarter of their diet in the autumn.

    The high levels of tannins in oak make large amounts of oak leaves or acorns poisonous to cattle, horses, sheep, and even goats, but not to pigs as they were domesticated from wild boar which were adapted to foraging in the oak forests, like deer. Acorns were also eaten by people in times of famine. The acorns were soaked in water first to leech out the bitter tannins and could then be made into flour.

  20. Go through the gate and continue uphill towards the stone walls. Join the track and follow it past Penfound Manor and Penfound Farm until you reach a lane.

    Penfound Manor near Poundstock is thought to be the oldest continually-inhabited ancestral home in England, dating to the Saxon period. It is also thought to be the first house in Britain with a purpose-built bedroom. The current house dates from late mediaeval times, based around a mediaeval hall which was then added to in Tudor times. William Penfound was murdered in the church at Poundstock and is said to now haunt his old house.

    More about Penfound Manor.

  21. Turn left onto the lane and follow it to Bangors, where it ends at a crossroads with the A39.

    The first record of the settlement of Bangors is from 1748 when it was named "Bangors Whissle".

  22. Turn right and follow the tarmacked path a short distance to reach a pedestrian crossing marked with two bollards. Use this to carefully cross the A39 then turn left and follow the path back to the junction. Turn right onto Vicarage Lane and follow this into Poundstock.

    The Saxons had a stronghold in northeastern Cornwall, which is reflected in many of the place names (-stow, -bury, -ton, -worthy, -cott, -ham, -ford etc). As you move further west, the Celtic place names (Tre-, Pen-, Lan-) become more common.

The remnants of Poundstock Castle were rediscovered in 1993 near the Wanson River. In Norman times this was a Motte and Bailey castle consisting of earth banks on which would have stood fortifications built from timber. These were often fairly short-lived structures and all that remains today are remnants of the banks and ditches. Poundstock Manor mentioned in the Domesday Book, of which nothing now remains, is also thought to have been located on the same site.

Some estimates suggest the UK has up to half of the world's total bluebell population; nowhere else in the world do they grow in such abundance. However, the poor bluebell faces a number of threats including climate change and hybridisation from garden plants. In the past, there has also been large-scale unsustainable removal of bulbs for sale although it is now a criminal offence to remove the bulbs of wild bluebells with a fine up to £5,000 per bulb!

During periods of cold weather, spring flowers, such as bluebells, have already started the process of growth by preparing leaves and flowers in underground bulbs during summer and autumn. They are then able to grow in the cold of winter, or early spring, by using these resources stored in their bulb. Once they have flowered, the leaves die off and the cycle begins again.

Other species (such as cow parsley or dandelions) require warm weather before they are able to germinate and grow. With the warmer springs induced by climate change, bluebells lose their "early start" advantage, and can be out-competed.

Because bluebells spread very slowly, they're considered to be an indicator of ancient woodland sites. In areas where trees are not very old, the fact there are bluebells around can indicate that there has been a wood on a site for a very long time. Even if there are no trees there at all, bluebells tell us that there was woodland there some time in the past. The bluebells along the coast are a relic of the gnarled oak woodland that used to grow here before it was cleared for grazing. There is still a patch of the ancient oak woodland left along the coast at Dizzard.

Some plant nutrients such as phosphorus tend to be more abundant near the surface of the soil where decaying organic matter collects. Bluebell seedlings start life at the surface so these are OK but as bluebell plants mature and send their roots deeper into the soil to avoid winter frosts, they have a phosphorus problem. They have solved this by partnering with a fungus that extends from their root cells, drawing in minerals from the soil in return for some carbohydrates from the plant.

Bluebells are extremely poisonous, containing a number of biologically-active compounds and were used (probably with varying success) in mediaeval medicine. The sap was used as a glue for book-binding as its toxicity repelled insects. It was also used to attach the fletchings onto arrows.

In Elizabethan times, starch made from the bulbs was used to stiffen collars and cuffs in clothing. The ruffs that were highly fashionable at the time would have needed a lot of starch to prevent them flopping. The toxins in bluebell sap might also have had the desirable property of preventing the starch encouraging the formation of mould.

In folklore, the bluebell is a symbol of constancy, presumably based on the fact that they flower in the same place every year. It was said that anyone who wears a bluebell is compelled to tell the truth. This could be the origin of the "…something blue…" that a bride should wear on her wedding day.

According to folklore, it's unlucky to bring bluebells into a house and also unlucky to walk through bluebells as it was thought that the little bells would ring and summon fairies and goblins.

In Old Cornish, both bluebells and marigolds were known as lesengoc which translates to "flower of the cuckoo". In Modern Cornish, the marigold has remained more-or-less the same but the bluebell has been changed to bleujenn an gog ("plant of the cuckoo"). The association between bluebells and cuckoos exists in Welsh ("bells of the cuckoo") and Gaelic ("cuckoo's shoe"), and in some English folk names such as Cuckoo's Boots and Cuckoo Stockings. It is thought that the association is due to the time that bluebells flower coinciding with the time that the call of the cuckoo is first heard.

Bluebells are also known by folk names based on their shape including Lady’s Nightcap and Witches’ Thimbles.

Other common names for the bluebell include "wild hyacinth" and "wood hyacinth" as they are related to the hyacinth family. Their Genus name Hyacinthoides also means "hyacinth-like".

When photographing bluebells, the flowers that look blue to your eye can end up looking purple in photos.

The first thing to check is that your camera isn't on auto white balance as the large amount of blue will cause the camera to shift the white balance towards reds to try to compensate.

Another thing to watch out for is that the camera's light metering will often over-expose the blue slightly to get a reasonable amount of red and green light and the "lost blue" can change the balance of the colours. You can get around this by deliberately under-exposing the photo (and checking there is no clipping if your camera has a histogram display) and then brightening it afterwards with editing software.

Bluebells are very vulnerable to trampling. The reason for this is that when their leaves emerge in the early part of the year, they are powered by the stored sugars in their bulbs. Sunlight is very limited at this time of the year and even more so in the shady places where they grow. In order to survive, they then need to photosynthesise flat-out to store enough starch in the bulb for next year's growth. If a bluebell’s leaves are crushed, it cannot photosynthesise and and doesn't have enough reserves left in its bulb to grow new ones. It's therefore important to stick to footpaths in bluebell woodland and best to take photos with a zoom lens from there as wandering around in the bluebells to take photos will inadvertently kill them.

A rare genetic mutation occurs in bluebells which results in about 1 bluebell in 10,000 being white rather than blue.

Three-cornered leeks - which have white bell-shaped flowers and are very common - are often misidentified as "white bluebells". The easiest way to tell them apart is that 3-cornered leeks smell strongly of onion. Their flower stems are also triangular (hence the name).

The jay is a member of the crow family recognisable by the flash of electric blue on their otherwise brown body. Their natural habitat is woodland, particularly oak.

Like squirrels, jays collect and bury acorns as a winter food store. Once jays were the main means by which oaks colonised new locations as a population of 65 jays can bury (but not always find again afterwards) half a million acorns in a month. Jays prefer to bury their acorns in open ground which is an ideal spot for a new oak tree.

Before Christianity, the Pagan Celtic people of Cornwall worshipped wonders of the natural world. Where clean, drinkable water welled up from the ground in a spring, this was seen as pretty awesome. The sites were seen as portals to another world, and is why fairies are often associated with springs. Where the springwater dissolved minerals, for specific conditions (e.g. deficiency in a mineral) or where the minerals present had antibacterial/fungal properties, the water appeared to have healing powers.

Several churches in Cornwall have been dedicated to St Winwalloe (or Wynwallow) including at Gunwalloe and Landewednack on the Lizard, Tremaine near Launceston and Poundstock near Bude. Winwalloe was the son of a prince of the Celtic kingdom of Dumnonia (now known as Cornwall) born in 460. He fled to Brittany to avoid the plague, founded a monastery and died at the age of 72.

Lichens are a partnership of two different organisms: a fungus providing the "accommodation" and an alga or cyanobacterium providing the "food" through photosynthesis. The fungal partner provides a cosy, sheltered environment for the alga and tends it with mineral nutrients. However, the alga partner is more than simply an imprisoned food-slave: it is such a closely-evolved alliance that the fungus is dependant on the alga for its structure. If the fungal partner is isolated and grown on an agar plate, it forms a shapeless, infertile blob.

One in five of all known fungi form lichens. Studies suggest that many species of fungi that form lichens started out from ancestors that lived on organic waste. Fossils have also revealed that the symbiosis between algae and fungi dates back more than 400 million years roughly to the time when plants first evolved from green algae.

Lichens often grow on sick or dying trees so some gardeners assume that the lichen might be harming the tree. In fact, it's purely because these trees have fewer leaves so there is more light available for the algae inside the fungus to photosynthesise. It's too dark under many healthy trees for the lichen to grow.

You'll notice that there is lichen growing on many of the headstones in the churchyard. Of the 2,000 British species, over a third have been found in churchyards and more than 600 have been found growing on churchyard stone in lowland England. Almost half the species are rare and some seldom, if ever, occur in other habitats. Many churchyards are found to have well over 100 species.

Lichens obtain nearly all their nutrients from the atmosphere and therefore can be very sensitive to air pollution. As a general rule of thumb, healthy lichens means clean air, but more specifically, different species have been found to be sensitive to different pollutants. By identifying common species that exhibits change for a particular pollutant, lichens can be used as an early warning dashboard showing not only how much air pollution there is but also what kind.

Bracket fungi can be recognised by tough, woody shelf-like growths known as conks. Some species can live for a very long time and are often coloured with annual growth rings.

Bracket fungi are one of the most important groups of fungi responsible for wood decay. This is good for nutrient cycling but less good if you own a forestry plantation. Many bracket fungi begin on living trees and can eventually kill a branch or whole tree by damaging the heartwood and allowing rot to set in. They can continue to live on the dead wood afterwards and a much more diverse range of species of bracket fungi are found in old natural forests with lots of dead wood.

Black fungi that resemble lumps of coal are known as coal fungus but also King Alfred cakes due to a legendary baking disaster by the regent. The dried fungus can be used with a flint as a fire starter - a spark will ignite the inside which glows like a piece of charcoal and can be used to light dry grass. There is evidence that prehistoric nomadic tribes used glowing pieces of fungus to transport fire to a new camp.

The common earthball is a woodland fungus that looks a bit like a scaly white or pale yellow potato and its external appearance could be confused with a small puffball fungus.

Earthballs have a slightly different approach to release their spores than puffballs. When mature, puffballs have a central opening in the top through which the spores puff out. With the earthball, the surface of the cap ruptures when the spores are ready to release.

Since puffballs are edible and earthballs are poisonous, it is a common offender for stomach upsets arising from misidentification. This might seem strange as puffball flesh is pure white whereas the internal earthball flesh is dark (purple/brown/black) when mature. The potential for confusion arises because when very young, the earthball flesh is pale.

Postboxes are a Victorian invention. The first pillar boxes were erected in the 1850s and by 1857, the first roadside wall boxes were in place. Early postboxes were green and it wasn't until 1874 that some in London were painted red. Over the next 10 years this was applied elsewhere. Postboxes are initialled with the reigning monarch at the time which allows them to be approximately dated. For example Edward 7th (marked as E VII) was only on the throne for 10 years so these date from the 1900s before the First World War.

The purple flowers resembling a miniature pansy that you see along the footpaths from March to May are almost certainly dog violets, so-called because they are unscented (rather than scented of dog) to distinguish them from the sweet violet. The plants are able to thrive both in shade and full sun, so are found in grassland and hedgerows as well as woodland. Sweet violets prefer shade, so if you do encounter these it will most likely be in woodland, but the dog violets are more common even in this habitat.

There are actually two different species of dog violet although they can interbreed to form hybrids. The common dog violet prefers shade whilst the heath dog violet prefers sunny spots and historically this is what kept them apart as separate species, although they are both relatively tolerant of a wide range of conditions. Human activity, particularly felling of woodland, has resulted in them ending up in each others' "territory" and they can sometimes even be seen growing side-by-side. The easiest way to tell them apart is from the shape of the leaves which are heart-shaped in the common dog violet but upside-down teardrop-shaped in the case of the heath dog violet.