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Species Information
Summary: Also listed in Clubs category. Features include a small, concave, stemmed fruiting body that becomes convex with a reflexed margin, the color whitish to grayish to buff or reddish, often with violaceous tints; surface smooth, stem darker at base; growth on rotting twigs and leaves, especially those covered by water; and microscopic characters.
It is found in the Pacific Northwest (Phillips), Europe including Denmark, Norway, Sweden, Finland, (Hansen), the United Kingdom (Dennis), and Switzerland (Breitenbach). It is probably the same as Ombrophila clavus (A. & S.) Cooke, reported from New England to WA, (Seaver), and CA (MykoWeb). There are collections from BC at the University of British Columbia.
Upper surface: up to 1cm across, concave becoming strongly convex with reflexed margin; "whitish to grayish or ochraceous-buff, usually flushed with violaceous tints", (Phillips), up to 1cm (var. grandis up to 2cm), at first concave, then strongly convex with reflexed margin; whitish or grayish, usually flushed with violaceous tints, (Dennis), 0.4-1.2cm, turbinate [top-shaped] when young, then with cushion-like cap; gray-whitish to ocher-whitish, sometimes with violet cast; smooth, (Breitenbach), 0.4-1.2cm, gray to reddish (Hansen), 0.3-0.6(1)cm across, at first obtuse-conic to turbinate [top-shaped], when old convex to nearly flat, margin flat to downcurved when mature; cream to dull brown, slightly darker at center; moist, bald, margin lacking hairs, (MykoWeb)
Underside: colored as upper surface; smooth (Breitenbach), bald in this genus (Hansen), colored as upper surface; bald, (MykoWeb)
Stem: "short; white, but often brown or black at base; smooth", (Phillips), more or less stemmed, long enough to lift the disc clear of the water, white, but often brown or black at base; smooth, (Dennis), distinct, often to 2cm long when substrate under water; brown-black toward the base, (Breitenbach), brown at base (Hansen), 1-2cm long and 0.1cm wide, widened toward apex; watery white, becoming dark brown to blackish toward base; slightly tomentose (use hand lens), (MykoWeb)
Odor: not distinctive (MykoWeb)
Taste: not distinctive (MykoWeb)
Microscopic: spores 10-17 x 3-5 microns, oblong-fusiform, often narrower at one end; asci 8-spored, up to 115 x 10 microns, varying greatly in length, cylindric-clavate, (Phillips), spores 10-17 x 3-5 microns, oblong-fusiform, often narrower at one end, nonseptate, uniseriate or irregularly biseriate; asci 8-spored, up to 115 x 10 microns, varying greatly in length, cylindric-clavate; paraphyses slender, cylindric, (Dennis), spores (8)9.5-15 x (3.5)4-5 microns, elliptic-fusiform, smooth, colorless, without droplets; asci 8-spored, (90)100-115 x 9-10 microns; inamyloid; paraphyses filiform, septate, sometimes forked, (Breitenbach), spores 10-17 x 3-5 microns, non-septate, (Hansen), 9.5-17.5 x 3.5-4.5 microns, oblong-cylindric to subfusiform, smooth, (MykoWeb)
Habitat / Range
on wet, rotting twigs and leaves, in ditches and swamps, also on dead stems; August to October, (Phillips), gregarious or single, best developed "on rotting twigs and leaves covered with water, as in ditches and swamps, but also on dead stems of Chamaenerion and the like, May and June, sometimes in July", (Dennis), single to gregarious, on dead twigs of trees and shrubs, as well as woody remains of herbs, always in very wet places such as wheel ruts and drainage ditches, spring to summer, (Breitenbach), on submerged leaves and barkless twigs, spring to early summer, (Hansen), single to gregarious on rotting stems of grasses and herbs in boggy mountain meadows, in spring shortly after snow melt, (MykoWeb)
