Here we have a fairly common and sought after tasty mushroom for this time of the year. It likes to grow in dense clusters on stray stumps and logs of broad-leaved trees – Just like many other brown toadstools too! Hmm!?
The Sheathed Woodtuft (Kuehneromyces mutabilis) has also adopted other common names, such as Velvet Toughshank, Brown Stew Fungus and Two-toned Pholiota, even though it is not strictly a Pholiota species. But I have seen it named as ‘Pholiota mutabilis’ somewhere else. It just goes to show that scientific names change from time to time as the scientific knowledge of fungi continually advances.
And talking of scientific names ‘mutabilis’ literally means ‘changeable’ in latin. A good choice of name I think, because the caps of this mushroom which are ‘shiny and brown’ (even orange-brown – see last pictures below) when moist can change to paler ochre from the centre outwards as it dries. This gives them the characteristic two-toned appearance.
On discovering any type of brown mushrooms on dead wood, most people become instantly suspicious. I don’t blame them at all. Unless you are familiar with other brown woodland species, identification can be a challenge. It has been known to be confused with Honey Fungus, Velvet Shank and Sulphur Tuft all of which grow in similar numbers on dead wood and share certain visual characteristics.
The main identification concern here though is the deadly Funeral Bell (Galerina marginata). Nature has thrown this one into the mix just to annoy and terrify the average mushroom hunter. I don’t currently have any images to show, but if you look elsewhere you’ll see what I mean. The cap can look frighteningly similar in size and shape and also dries lighter brown at the centre (again, depending on moisture level). Fortunately, one reliable comparison is that it has a ‘smooth and silvery’ stem, whereas the Sheathed Woodtuft’s brown scales (beneath the ring) are unmistakable.
Other features such as location, time of year, gills and spore print are not effectively reliable for comparison. So it goes without saying that if you intend to eat them, take extra care in the identification process. If you’re 100% happy just try a small portion first, leave it 24 hours to see how you go, just like you should with all mushrooms you eat for the first time. There’s always a small possibility of an allergic reaction, but fear not, for if it is the Sheathed Woodtuft, it won’t kill you!
I have to admit, the general appearance of this mushroom hasn’t inspired me to eat it, but apparently it is known to be very good with a pleasant nutty taste. But I’m willing to give it a go soon. I think!
QUICK ID TABLE: SHEATHED WOODTUFT / BROWN STEW FUNGUS Kuehneromyces mutabilis
CAP / FLESH
3-7cm across. Initially convex shape then flattenned out; often umbonate (with a small bump). Orange-brown to brown. Becomes lighter in the centre as it dries, giving a two-toned colour effect.
3-8cm x 0.5-1cm. Whitish at the apex, darker towards the base. Smooth above the ring, finely scaly below.
GILLS / SPORE PRINT
Adnexed. initially pale then later cinnamon-brown.
HABITAT / SEASON
In dense clusters on stumps and standing/fallen trunks of deciduous trees. In many numbers. Spring to early winter
Edible and good. Take care not to confuse with Galerina marginata (The Funeral Bell) a deadly lookalike; focus on the stem differences.