Sporocarps stipitate, cylindrical to "cigar-shaped", usually in small
clusters of 2 to ca. 15, total height 5-7 mm, ca. 0.3 mm broad, dark
Thin, membranous, reddish brown and translucent, common to a group of
Ca. 1/3 of total height, thin, shining black by RL, deep reddish
brown to almost black opaque by TL, hollow - air bubbles ocasionally
seen in water prep.
Early evanescnet, not seen.
An extension of the stalk, gradually tapered, reaching almost to
apex where it is typically flexuose, giving rise to columella along
whole length, dark reddish brown to almost black by TL.
Primary branches moste ± orthogonal to columella, 1-2 µm broad,
forming an internal net with 2-3 meshes, branches ocasionally
flattened and often with triangular widenings at nodes, reddish brown
by TL, thin peripheral branches often anastomosing but not forming
a net, many ca 5-15 µm long, free, pointed branches at periphery.
Globose, pale greyish brown by TL, with small, short spines arranged
in a mostly somewhat fragmentary net, ca. 5-7 meshes along a diameter,
spines not connected with ridges and not forming a rim along periphery,
6 - 7.4 - 9 µm Ø (n=25, excl ornamentation).
Most danish finds were developed in moist chamber on branches of Rubus
fruticosa coll. A few were collected from rotten, deciduous wood.
Known from three localities in North-Zealand, and from two localities
in east and central Jutland.
Reported from France, Germany and Sweden in Europe and from Mexico,
Taiwan and New Caledonia. (Not all localities shown on map)
The genus Stemonaria was erected in 1984 by
Nannenga-Bremekamp, N. E.
, separated from Stemonitis by the absence of a peripheral
capillitial net. This character may be difficult use, as the net of
weathered specimens of Stemonitis may be torn and fragmentary. A safe
identification thus requires good material.
Stemonaria pilosa bears some resemblance to small specimens of
Stemonitis fusca. In the field the notably smaller size and small and
open clusters of sporocarps are often indicative. In the microscope
a careful examination of the surface of the capillitium is neccesary.
The Danish material has been compared to documentation of three
collections identified as S. pilosa or S. cf. pilosa and kindly sent
by Marianne Meyer. The comparison did not give rise to changing
Description and discussion based on three collections from moist
chamber: hfg 2385, hfg 2713 and hfg 2810.
Abbreviations: TL : transmitted light; RL : reflected light; Ø : diameter;
TBU : Danish Botanical Topographical District.
Colour-codes refer to: Kornerup, A. & J. H. Wanscher 1974: Farver i farver.
5th reprint. Politikens Forlag, Copenhagen.
When not otherwise indicated spore measurements are given as:
min-mean-max or (extreme-)min-mean-max(-extreme). Spore measurements are exclusive of ornamentation.
Line drawings are free hand sketches.
Distribution maps: Maps of Danish distributions are based on material seen
by the author. World distributions are based on
reports extracted from literature.