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All that glitters… The Glistening Inkcap

These mushrooms love to be in a crowd! They are one of the first to see in the year, fruiting from mid to late spring all the way through to late autumn/early winter.

Coprinus micaceusThe Glistening Inkcap (Coprinellus micaceus) or should I say Inkcaps (plural) in this case, are extremely common; always found in small to large (sometimes very large) and tightly packed groups (caespitose) on or around broad leaf stumps/wood and buried wood. You really can’t miss them.

The best time to find them is when they are young and still with an ovate shaped cap and hopefully haven’t been blasted by wind or rain. You will see the fresh caps are covered in a fine white powder that appears glittery or glistening, hence the common name. This coating, more often than not, will eventually disappear with age and with the interaction of the elements etc.

Each small cap is around 1-4cm in size and generally ochre coloured with a darker cinnamon brown centre. Over time they will expand to produce a bell-like shape; their colour will fade or become dull, often with a greying (blackening) margin.  Also note that, as with many similar of the smaller inkcaps, there are very noticeable grooved markings on the surface, especially nearer to the margin.

The gills are free from the stem and are initially white, maturing to date-brown and eventually black as they turn into an inky liquid (deliquescing) – another common trait of the aptly named Inkcaps.

They are said to be edible, but they don’t seem to be much of a meal to me – or even appealing for that matter! So I haven’t tried to cook and eat any. Please leave a comment on this post if you have indulged – but I can’t imagine there are many recipes out there for them – or maybe there is!

Glistening Inkcap(Coprinellus micaceus)

Glistening Inkcap (Coprinellus micaceus) growing in large, densely packed groups feeing off old stumps and dead wood which is sometimes buried beneath the surface.

QUICK ID TABLE: GLISTENING INKCAP Coprinellus micaceus

CAP / FLESH

Ovate (becoming bell-shaped over time). Ochre coloured; darker brown at the centre. Becoming duller with age.

STEM

4-10cm x 0.2-0.5cm. White.

GILLS / SPORE PRINT

Free from stem; initially white, maturing to date-brown, then to black (deliquescing)
Spore Print: Date brown (see how to take a spore print here).

HABITAT / SEASON

On or around broad-leaved tree stumps, dead and/or buried wood. In large groups.
Late spring to early winter.

EDIBILITY

Edible.

The Genus COPRINUS/COPRINELLUS & Related (Inkcaps): Characteristics to look out for:

• Most species gills dissolve into an inky black liquid as the black spores ripen.
• Grow on the ground, wood or dung.
• Often grow in groups (esp. smaller species)
• Smaller species have distinct radial grooved markings on the cap.

Sobriety Test! – The Common Ink Cap

This common and cheeky mushroom has a trick up it’s sleeve. If you’re a ‘tea totaller’ then there’s nothing to worry about. Just throw it in the pan, cook it up and get stuck in.

Coprinopsis atramentariaOn the other hand if you’re fond of the odd tipple – beware! The Common Ink Cap (Coprinopsis atramentaria) inhibits the breakdown of alcohol in the liver, and toxic levels will build up in the body.

Ironically, my first discovery of this mushroom was actually on a Sunday afternoon on my way home from the pub! I thought it best to leave it where it was. Had a snooze instead!

If consumed with alcohol a selection of symptoms will occur, including hot flushes, redness of the face/upper body, headaches, sweating, shortness of breath and some tingling in the limbs. These side effects, although not too serious, would be very unwelcome after lunch time. So if you’re going to try some, avoid the juice for a good 2-3 days (I’m guessing, as I haven’t tried it myself). Anyone fancy a pint?

Anyway, that’s the interesting technical part over with, now on to what our common friend looks like. One of its most striking features which it shares with it’s other family members is the cap itself, which has a distinctive ‘torpedo’ or ‘bell-like’ shape. As it matures it will open up, sometimes only slightly, and begin to lose colour and disintegrate. It’s at this stage the gills dissolve and create an inky fluid. In the past this fluid literally has been used for writing ink. Wonderful stuff.

So stay off the booze if you want a taster. Hope it’s worth it.
I’m off to the pub. Cheers…

Update 25.04.11 – Just a quick note on the habitat of the Common Ink Cap. Although most of my finds have been in grassland or gardens, this mushroom is equally at home in woodland. Recent discoveries were found at the base of a rotting tree stump and also coming through a pavement next to a wall (behind which was woodland). Their main source of nutrients is from dead rotting wood underground, hence the diverse locations. TTFN.

The Common Ink Cap in all its glory, although in a slightly phallic pose! The black fluid from the mature gills has been used in the past as a good writing ink, by boiling the inky cap with a little water and cloves.

Also see my post on it’s tasty (non-poisonous twin) The Shaggy Inkcap.

Common Ink Cap

The torpedo or bell shaped Common Ink Cap in grass

Coprinopsis atramentaria

Notice the varying yellowish-brown/whitish-yellow colouring, and varying levels of small brown scales which aren’t always present or noticeable.

QUICK ID TABLE: COMMON INKCAP Coprinopsis atramentaria

CAP / FLESH

4-8cm tall. Initially egg shaped, later bell shaped; opening up flatter with age. Grey/fawn colour. Thin fleshed.

STEM

6-17cm x 0.9-1.5cm. White, smooth and hollow. Trace of ring near the base.

GILLS / SPORE PRINT

Crowded and grey; maturing brown; to black, eventually to inky fluid.
Spore Print: Black (see how to take a spore print here).

HABITAT / SEASON

Grass, parks and gardens. Growing on buried wood. Spring – early winter.

EDIBILITY

Edible but can be poisonous if alcohol is in the body, even from days before and after.

The Genus COPRINUS, COPRINOPSIS & Related (Inkcaps): Characteristics to look out for:

• Most species gills dissolve into an inky black liquid as the black spores ripen.
• Growing on the ground, wood or dung.
• Many young species have woolly veil. Felty scales are often left on the mature specimen.
• Smaller species have distinct radial markings on the cap.