Kilminorth Wood is the largest area of sessile oak woodland in this part of Cornwall. A Local Nature Reserve was created in 1993 and is owned by Cornwall Council. A local group, known as the Friends of Kilminorth Woods, promote the conservation and improvement of the woods and its use for education and recreation. The woodland is classified as ancient and contains other broadleaf species including beech and chestnut. The woodland bordering the West Looe River provides a habitat for an array of wildlife including birds and mammals.
Herons can sometimes be seen beside the river.
The English surnames Earnshaw and Hernshaw originally meant "heron wood" and the surname Herne is also a corruption of Heron.
The little egret - a white member of the heron family - can be seen on many of the creeks in Cornwall and yet is only a very recent settler in Britain. The birds first appeared in Britain in any number in 1989 and the first to breed was in 1996 in Dorset.
Mosses don't have roots but instead have little rootlets known as rhizoids. Since there is no need to root into soil, mosses can grow on stones, tree trunks, buildings etc. This together with their wind-carried spores makes them excellent colonisers of barren land. The buildup of organic material from dead moss then provides an environment that other small plants can start to colonise.
Kingfishers are found near slow-moving or still water where they dive to catch fish, as their name implies, but they also eat many aquatic insects, ranging from dragonfly nymphs to water beetles.
The Kingfisher is able to switch between light receptors in the main central area of its eye and a forward-facing set when it enters water, allowing it to judge distances accurately underwater. It is estimated that a female needs to eat over twice her own body weight in order to increase her condition sufficiently for egg laying.
The unmistakable metallic blue and orange birds fly fast and low over the surface of the water so may only be apparent as a blue flash. The pigment in their feathers is actually brown but the microstructure of their features results in light interference patterns which generate the brilliant iridescent blue and orange colours. Unfortunately the result, during Victorian times, was that kingfishers were extensively killed for display in glass cases and for use in hat making. The population has since recovered and is now limited by the availability of suitable waterways.
The West Looe river rises near Dobwalls and runs for roughly 8 miles through Herodsfoot and Churchbridge before entering the creeks of the flooded river valley just below Milcombe with a final mile along the creek to its confluence with the East Looe river. The sedimentary rocks surrounding the river form an aquifer reserve which results in the river levels being topped up by groundwater during periods of low rainfall.
Yellow archangel is a native plant and member of the dead nettle family (and it's also known as the Golden Dead Nettle). The flowers are pale yellow, hence the first part of the name. The second part of the name (including the angelic association) is because it looks quite like a nettle but doesn't sting.
Since the 1970s, a variegated garden variety of yellow archangel (sometimes known as "aluminium plant" due to silvery metallic areas on its leaves) has escaped into the wild where it is spreading rapidly, particularly in the Southwest. It can propagate from a small piece of creeping stem and also produces several hundred seeds. Once established, it forms dense carpets in shady areas which exclude other plants. It has been deemed so invasive that it is now illegal to introduced it into the wild.
The stone wall on the right is the Giant's Hedge.
The Giant's Hedge is the remains of a wall from the Dark Ages which runs for ten miles from Looe to Lerryn. In some places it is still twelve feet high and it was recorded as being 16 feet high in Victorian times. Where it is best preserved, it is stone-faced and has a ditch running alongside. It is thought that it marked and defended the border of a Cornish Kingdom, which was otherwise surrounded by water from the River Fowey to the West Looe River.
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.
A mature tree can absorb tens of kilograms of carbon dioxide each year adding up to a tonne over a number of decades. However, burning one litre of petrol produces just over 2kg of carbon dioxide so it takes about half an acre of trees to absorb the average amount of carbon dioxide produced by one car in a year. When trees die and decompose, the majority of the carbon is gradually released back into the atmosphere depending on how fast the various bits of tree rot (the woody parts take longer).
There are several species of Woodrush in the UK that all look fairly similar. They are most noticeable in woodland where they often form dense mats - hence the name.
Woodrush has green pointed leaves which can be mistaken for bluebell leaves when there are no flowers to provide an obvious difference (woodrush flowers are unexciting small brown things that look a bit like grass seed). To tell the leaves apart, woodrush leaves taper steadily to a sharp point whereas bluebell leaves are relatively straight for most of their length and only taper near the end (like a broadsword). Bluebell leaves are also slightly blue-green whereas woodrush is a glossy vibrant green.
The word "beech" is thought to have the same origins as "book" as beech (most probably the bark) was used as a writing material in which to carve runes by Germanic societies before the development of paper. This is still apparent in modern German where the word for "book" is buch and "beech tree" is buche.
Chestnut trees grow along this stretch of path.
The size of the nuts from wild British chestnut trees is quite variable but the largest rival the nuts sold in supermarkets. Nuts that are very flat or less than the girth of your little finger are not worth harvesting; anything bigger is viable. A painless way to extract the nuts is to grip the husk between your feet and rub it between your boots or against the ground. This saves having to handle the spiky husks as the spikes are very sharp and tend to break off under the skin to leave behind splinters. Often the husks contain one (fairly round) large nut surrounded by several small, flat nuts, so it's worth squeezing out quite a few husks to get the larger nuts. Discard any nuts with holes in (as they will contain maggots) or that are very dark in colour - the fresher ones will be "chestnut" brown rather than dark brown.
In England, the chestnut was originally known as the chesten nut. Both this and the modern French word châtaigne descend from the Old French word chastain.
Wood from the oak has a lower density than water (so it floats) but has a great strength and hardness, and is very resistant to insect and fungal attack because of its high tannin content. This made it perfect for shipbuilding.
The broadleaf deciduous trees in the woodland reach their pinnacle of autumn colours roughly in the first week of November.
A normal healthy leaf contains chemicals which are both green (chlorophyll) and yellow (carotene). If chlorophyll stops being produced, leaves turn yellow. This happens when sunlight is reduced either temporarily (e.g. accidentally leaving something on the lawn) or in autumn when there is less sunlight overall and when cold temperatures also speed up the breakdown of chlorophyll.
Sycamore timber was traditionally used for milk pails as it does not impart any flavour or colour. It is still used today for kitchenware and is recognisable by the light colour and fine grain.
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.
95% of all plant life on Earth, including trees, relies on a symbiotic relationship with fungi. It is thought that without fungi, land plants could not have developed at all. Fungal mycelium often grows around or actually within the roots of plants and give the plant access to water and nutrients it couldn't otherwise obtain easily from the soil. In return, the plants provide the fungi with sugars produced through photosynthesis.
The rate at which a tree grows varies through the year depending on the amount of light and moisture available. This is visible in a sawn tree trunk as a ring where the wider lighter area wood is laid down more quickly in spring-early summer and then the narrow darker area more slowly in late summer-autumn. Each ring corresponds to a year and so the age of the tree can be worked out by counting the rings.
In urban areas in cold countries such as Canada, a black form of the grey squirrel is more common which is able to withstand the cold better both by retaining more heat and also having a slower metabolism. In wilderness areas where predators are more common, the black squirrels don't seem to do so well, perhaps because they are less camouflaged against trees than the grey ones.
The name Looe is from the Cornish word logh (meaning sea lake, similar to the Scottish word) and on 17th Century maps the name still appears as "Low" or "Lowe". East Looe and West Looe originated as separate towns. East Looe is the older of the two and by 1310, Looe had five ships in the wine trade with Bordeaux. There are still a number of mediaeval buildings in the old town.
You may remember from school geography lessons that the faster-flowing water around the outside of the bend causes a meander in a river to slowly grow as the outside edge is eroded and sediment is deposited on the inside by slower-moving water. At this point, your school geography teacher probably got excited about ox-bow lakes and never got around to explaining exactly why the water flows faster on the outside in the first place. So that you don't go to your grave feeling short-changed, an attempt at an explanation follows...
Flowing water piles into the outside of the bend and creates a higher pressure there. Close to the riverbed, water is moving very slowly so the high pressure pushes water across the bottom from the outside to the inside. This drags the faster-moving water across the top of the river to the outside to take its place. This spiralling current both erodes the outside edge with faster-moving water and also transports the sediment back across the bottom to the inside
Ferns evolved a long time before flowering plants and dominated the planet during the Carboniferous period. The bark from tree ferns during this period is thought to have been the main source of the planet's coal reserves.
Fern fronds form in a coil (known as a crozier or fiddlehead) with the delicate tip protected in the centre. As the outer parts begin to photosynthesise, the sugars they produce cause more water to be drawn into the leaf, causing it to expand and gradually unfurl.
Ferns produce 2 different types of leaf (although they often look quite similar). The normal leaves are used for photosynthesis of sugars just like in other plants. Ferns also produce a special kind of spore-bearing leaf which can often be identified from the dots on the underside. In hart's tongue ferns, these are really obvious.
Ferns produce neither flowers nor seeds and rely on the tiny spores for their reproduction which are most commonly distributed by the wind. This allows them to colonise some quite random places such as rocky ledges that heavier seeds might not reach. Since the spores come from just one parent fern, the offspring is a genetic clone.
The spore from a fern doesn't grow into a fern. Instead it grows into an organism resembling a liverwort (i.e. a small green blob). Instead of producing spores, these produce eggs and also sperm which they interchange with neighbouring blobs to get a new mix of genes. The fertilised egg grows into a new fern and so this alternating process of ferns and blobs repeats.
Spanish bluebells have been planted in gardens and these have hybridised with native bluebells producing fertile seeds. This has produced hybrid swarms around sites of introductions and, since the hybrids are able to thrive in a wider range of environmental conditions, the hybrids are frequently out-competing the native English bluebells. Sir Francis Drake would not be impressed! The Spanish form can be fairly easily recognised by the flowers on either side of the stem. In the English form, they are all on one side. In general, the English bluebells also have longer, less-flared flowers and are often a deeper colour. However, the easiest way to tell the difference between native and non-native bluebells is to look at the colour of the pollen: if it is creamy-white then the bluebell is native; if it is any other colour such as pale green or blue then it's not native.
Holly is able to adapt to a range of conditions but prefers moist ground. It is very tolerant of shade and can grow as a thicket of bushes underneath larger trees. However, given the right conditions, holly trees can grow up to 80ft tall!
Holly was known in Cornwall as the holm (bush) and is the origin of the Holmbush area of St Austell and Holmbush Mine in Kelly Bray.
The berries of holly contain a chemical compound very similar to caffeine. Only in very small doses is this a stimulant; in larger doses it is toxic. It is for this reason that you see holly berries on bushes rather than being inside the nearest bird. The birds have learned to wait until after the frosts have reduced the toxicity of the berries before eating them.
Anyone who has sat on a holly leaf will know how prickly they can be but the leaves particularly on larger holly bushes often vary considerably with less spiky leaves nearer the top.
Holly is able to vary its leaf shape in response to its environment through a chemical process known as DNA methylation which can be used to switch genes on and off. If its leaves are eaten by grazing animals or trampled by walkers, the holly will crank up the methylation level to produce really spiky leaves on these stems. Conversely on the stems where the leaves are able to grow old in peace, the holly will produce versions that are flatter and therefore more efficient at catching the light. An individual leaf can last up to five years.
Holly has separate male and female plants, so not all holly bushes produce berries - only female plants. In less biologically-enlightened Pagan times, holly was thought to be a male plant (the spikes symbolising aggression) whereas ivy was regarded as a female plant (symbolising attachment). The Christmas Carol "The Holly and the Ivy" is thought originally to derive from Pagan fertility myths onto which Christian symbolism has subsequently been added.
The association of holly with winter celebrations predates Christianity: druids were known to use holly wreaths which, it is likely with some discomfort, they wore on their heads.
From Roman times, holly trees were planted near houses as it was believed to offer protection from witchcraft and lightning strikes. There is some scientific basis for the latter at least: the spines on the leaves can act as lightning conductors. The sharp points allow electrical charge to concentrate, increasing its potential to form a spark.
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