Archive for ◊ October, 2011 ◊

Author:
• Tuesday, October 25th, 2011

Although present mainly from June through to December this fungus is much more noticeable throughout the winter months, which unfortunately for the mushroom hunter, is well on it’s way! And to note, we have especially had a dry summer/autumn which has robbed us of many wonderful woodland finds, but that’s the way it goes sometimes…

Calocera viscosaThe commonly named Yellow Stagshorn (Calocera viscosa) can be found always growing on dead and rotting coniferous stumps and logs, or appearing to grow from the soil, but this is due to underground rotting wood.

Although this fungus looks suspicious due to its bright yellow colouring, it is in fact harmless. But it’s not really a gourmet treat either! It has a rubbery texture with a ‘non-existent’ flavour. Never mind! But that besides, because of it’s pretty appearance, it is sometimes used to garnish salads and foods.

The Small Stagshorn (Calocera cornea) is a very close relative but much smaller and grows on deciduous rotting wood. Unlike the Yellow Stagshorn it has no forking branchlets at it’s tip but instead tapers out to a single, thin tip.

Look out for Yellow Stagshorn this autumn and winter time. They usually tend to be a grand and pretty decoration to any lone conifer stump…

Calocera viscosa

Yellow Stagshorn Fungus - Found in mixed woodland on rooting coniferous wood and stumps.

 

Author:
• Wednesday, October 12th, 2011

The words ‘Mushroom’ and ‘Toadstool’ are not truly scientific names, but general common usage describes these as edible or inedible (and poisonous) fungi respectively. But there is a grey area, (internationally speaking) regarding this mushroom or should I say toadstool?. It is still sold in eastern Europe markets, where-as here at home in the UK, it is strongly advised to be avoided. Over time, this fiendish toadstool can release it’s toxins and seriously poison you…

Brown roll-rimThe Brown Roll-Rim (Paxillus involutus) is a very common toadstool found throughout the UK and Europe. I have come across it many times in mixed woodland. If picked for eating it can lose it’s toxicity once thoroughly cooked, but over time and if eaten on a regular basis, it’s toxin will enter the bloodstream and systematically cause the destruction of the red blood cells. Not very pleasant and definitely not worth the risk. There’s no real timescale for when and if this will happen, but I think it’s best described as a ticking time-bomb!

The common name helps describe this naughty toadstool quite well. Naturally a brown toadstool, it’s rim remains ‘inrolled’ although less so when expanded as it grows – see picture on the left – excuse long fingernails!). The texture when younger is finely felted and later becomes smooth (slimy when wet).

Size-wise, it can grow from 5 – 15cm in diametre when fully mature and has a distinct hazel brown colour (tawny brown / olive when younger) often dotted with darker orange/brown blotches.

The crowded, decurrent gills are a reliable feature for identification also. They ‘bruise’ dark brown on handling are easily separated from the cap flesh.

Being very common in broad leaved and sometimes coniferous woodland (even parks and gardens), you will most likely stumble across these toadstools during late summer to late autumn. They have been classed as deadly poisonous and therefore, to repeat myself again, just avoid them. Several deaths have been reported from Europe. Better the devil you know – to coin a phrase!

Paxillus involutus

The Brown Roll-Rim Toadstool - Viscid when wet and brusing dark brown on the gills (top). Younger examples are more finely felted when young before becoming smoother.

PS. If you want to get scientific – check out this eco-news on the study of this very mushroom (and related species): http://www.jgi.doe.gov/sequencing/why/99182.html

Paxilus involutus identification notes

Author:
• Tuesday, October 11th, 2011

Walking along a woodland path, the adjacent foliage was heavily overgrown. But something still caught the corner of my eye at the base of a large oak tree. At first, I thought people had left some rubbish, considering the size, but as I removed the overgrowth (receiving many lovely nettle stings!) the picture became clearer.

Meripilus giganteusThis was indeed a Giant Polypore (Meripilus giganteus or Polyporus giganteus) occupying a good half of the tree’s circumference. Older parts on one side and younger ‘new’ born’ specimens emerging on the other.

A common mistake would be to confuse this bracket fungus with Hen of the Woods (Grifola frondosa) but on comparing notes, you’ll realise that these things are just too damn big! And the ones featured here will grow bigger still.

The fruiting bodies of this polypore branch out in clumps. Each clump shares the same short and chunky stem, at the end of which are numerous fan-shaped caps ranging in size from 40 – 90cm in diametre, but are relatively thin compared to this width. They’re quite tough (but flexible) to prize away from the central stem, so a good sharp knife is in order!

Apart from their distinctive size, the caps have reliable and distinctive markings. Their light brown ‘overall’ colour (which darkens with age) display several concentric, light/dark zones. On closer inspection you’ll see a layer of very fine brown scales. The edges are fanned or rosette-like and slightly grooved.

The Giant Polypore might not be as tasty as Chicken of the Woods but it is edible. It does smell quite nice but can taste quite bitter. But just like the Beefsteak Fungus, there maybe be a cooking preparation method to make this taste alot better. I haven’t tried myself, but it’s worth a go I think.

Keep a look out for these beauties this autumn. They can be found at the base of (mainly) beech or oak trees (or nearby, emerging from the underground roots) and sometimes on stumps. If you do take some samples you’ll notice after time the pores on the underside turn blackish where touched or bruised. Although unsightly, I don’t believe this affects the final taste, if prepared like the Fistulina hepatica for example.

Polyporus giganteus

The Giant Polypore - Older specimens appear darker brown (top) while younger ones are a lighter shade (bottom). Note the pure white pores underneath (middle) showing a much younger specimen on the right.