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Species Information
Summary: Also listed in Veined category. Features include 1) a small cap that is oval to fan-shaped or kidney-shaped, lobed, hygrophanous, and colored gray brown to yellow brown or lighter, often blackening on exposed margins or on drying, 2) anastomosing veins on spore-bearing surface, 3) off-center or lateral stem that is not well-formed, and 4) growth on moss. The description is derived from Redhead(7) except where stated.
Collections of Arrhenia lobata were examined from BC, WA, OR, ID, MB, NF, NT, NU, ON, PQ, AK, CO, MI, NH, Czech Republic, Germany, Russia, Slovakia, Sweden, Turkey, Antarctica, (Redhead(7)), CA, MT, UT, (Redhead(6)), AK, YT, Germany, (Miller(13)), Switzerland (Breitenbach(3)), and Britain/Ireland (Buczacki(1)).
Cap: 0.5-4cm across, round or more often oboval, fan-shaped or kidney-shaped, rarely funnel-shaped by fusion of lateral lobes, membranous, margins incurved and remaining so, usually lobed, sometimes deeply incised, also crisped and crenulate in some; hygrophanous, light gray brown to gray yellow brown or buff, fading when partially dry, often blackening on exposed margins or on complete drying; moist
Flesh: membranous, gelatinous and soft, elastically extensible, (Breitenbach)
Gills: smooth when immature, soon with branched more or less radially arranged veins with numerous curving anastomosing lateral veins or more irregularly veined-wrinkled, often forking; colored as cap or paler
Stem: not well formed, attachment off-center or lateral, base may be whitish or just paler than cap, attached by whitish mycelium
Odor: not distinctive
Taste: not distinctive
Microscopic spores: spores 5-10(15) x 4.2-8.5, usually elliptic, oval, oboval, varying to tear-shaped, pear-shaped, almond-shaped or nearly round to round, smooth, inamyloid, colorless, thin-walled, always with a conspicuous blunt apiculus; basidia 2-spored or 4-spored, 20-39 x 6-8.5 microns, clavate, clamped, nearly colorless at top, mostly with brownish bases, (Redhead(7)), pleurocystidia and cheilocystidia absent; clamp connections present, (Watling(2))
Spore deposit: white
Habitat / Range
single to clustered on moss in wet sites, "alpine sites or lowland bogs or fens often around the margins of pools", (Redhead), moss-associated, "often found in fens, along streams, or in association with melting snow", (Trudell), in bogs and other wet habitats, "in association with mosses", "sometimes submerged", fall, (Buczacki)
