Arcyria minuta Buchet

Fructification
Sporocarps in small groups, shortly stipitate, oblong ovoid to almost cylindrical, up to 3 mm high and 0.4-0.5 mm broad, greyish rose (6D4), fading to leather yellow (5D7)

Stalk
up to ca. 0.5 mm long, mostly shorter, yellowish grey, filled with sporelike cells, which are 8 in diam. near apex, up to 20 µm at base.

Peridium
early evanescent except near base where it forms a ± flattened, funnelshaped cup, pale yellowish in transmitted light, on the inner side with a fine net pattern alog the edge, formed by low interconnected warts.

Capillitium
forming a dense net of 2-3 µm broad tubules which are firmly attached to all of the calyculus inside, the tubules with a low and afirly open pattern of half-rings, warts and fine lists, occasionally forming indistinct spirals, near the cup the tubules are broader and almost smooth.

Spores
sperical, with very fine warts (oil immersion) and scattered groups of larger warts, greyish rose, fading to leather yellow, in transmitted light pale yellowish, 7.2-7.6-8.2 µm in diam.

Ecology
Rotten, watersoaked trunk of elm (Ulmus sp.).

Distribution in Denmark
Rare. Only three collections known.

Global distribution

Discription
Description and discussion based on Albertsen & Gøtzsche (1993).