5 December 2016 Hampshire. Photograph copyright Leif Goodwin.
Phlebiella vaga, Trechispora sulphurea, Trechispora vaga, Cristella sulphurea
Forming a thin layer on the substrate, fibrous, cottony, fan shaped, tightly attached to the substrate, brown at the centre, then bright yellow, with white tips
Fibrous, soft. The fruiting body turns a deep wine red in a KOH solution.
Summer to autumn
On rotten wood, usually from deciduous trees, especially beech, but also from conifers
Spores sub-spherical, spiny (5-6) x (4-4.5) µm2. Basidia club shaped, 4 spored. Hyphal system monomitic, clamps present.
I am grateful to Mike Valentine and Nick Legon for help with identifying the specimen shown. Similar species include Piloderma bicolor and Tomentellopsis echinospora, neither of which turns red when exposed to KOH solution. Coniophora puteana can form yellow patches with a white fibrous margin when young.
On a mossy larch stump. 30 October 2016 Hampshire. Photograph copyright Leif Goodwin.
Spores in Melzer's solution viewed with a x100 immersion objective. 30 October 2016 Hampshire. Photograph copyright Leif Goodwin.
Clamped hyphae in Congo Red viewed with a x40 objective. 30 October 2016 Hampshire. Photograph copyright Leif Goodwin.