Arrhenia obscurata
No common name
Uncertain
Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.
Introduction to the Macrofungi
No common name
Uncertain
Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.
Introduction to the Macrofungi
Photograph
Species Information
Summary:
{See also Dark Omphalinoid Arrhenia Table} Features include 1) a hygrophanous, fuscous cap fading in streaks to gray, the margin striate when moist, 2) decurrent, well-spaced gills that are colored as the cap, 3) a bald stem that is colored as the cap, 4) mild odor and taste, and 5) habitat on sandy soil or moss. The description below is that of H.E. Bigelow for Clitocybe atrobrunnea (except where noted).
Gills:
"decurrent, subdistant to distant, narrow to broad"; colored as moist cap but fading more slowly; edges even
Stem:
1-2cm x 0.1-0.25cm, equal; colored as moist cap but fading more slowly; bald
Veil:
[presumably absent]
Odor:
usually not distinctive
Taste:
usually not distinctive
Microscopic spores:
spores (6)7.5-10(11) x 4-5(6) microns, elliptic to elliptic oblong in face view, at times sublacrymoid [somewhat tear-shaped] or obovate in side view, at times polymorphic, smooth, inamyloid; basidia 4-spored or sometimes 2-spored, 23-35 x 6-8 microns, brown "necrobasidia" present at times in hymenium; [pleurocystidia and cheilocystidia presumably absent]; cap cutis yellowish brown in KOH, pigment heavily encrusted, hyphae 2.5-7.5(1) micron wide, cylindric; clamp connections present
Spore deposit:
white (Buczacki)
Notes:
Bigelow examined collections from ID, CA, and WY. There are collections from BC at the University of British Columbia (as Omphalina).
EDIBILITY
Habitat and Range
SIMILAR SPECIES
Arrhenia hohensis has 1) gills that are paler than the moist cap (in A. obscurata a similar color to cap), 2) a cap that is a different dark brown from A. obscurata, 3) spores that are consistently elliptic to broadly elliptic (variable in shape for A. obscurata), and 4) some degree of stem hair development (none observed in A. obscurata). (Bigelow(5)). Clitocybe peltigerina has spores that are consistently elliptic to broadly elliptic. Arrhenia epichysium fruits on wood. See also SIMILAR section of Arrhenia sphagnicola.Habitat
scattered on sandy soil or sometimes on moss, June to September, (Bigelow), summer, fall
Status Information
Synonyms
Synonyms and Alternate Names:
Omphalina obscurata D.A. Reid