Leptosporomyces fuscostratus (Burt) Hjortstam
no common name
Atheliaceae
Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.
Introduction to the Macrofungi
no common name
Atheliaceae
Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.
Introduction to the Macrofungi
Photograph
Map
Distribution of Leptosporomyces fuscostratus
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Species Information
Summary:
Features include 1) resupinate growth on wood, 2) the soft membranous consistency of a cream colored pellicular layer, sometimes with an olive tint, a brownish cobwebby subiculum, and brownish rhizomorphs, 3) spores that are elliptic, smooth, inamyloid, and colorless, 4) a monomitic hyphal system, the hyphae with clamp connections, and some hyphae encrusted.
Microscopic:
SPORES about 4 x 2 microns, narrowly elliptic to subcylindric, inamyloid, colorless, thin-walled; BASIDIA 10-15 x 3-4.5 microns, narrowly clavate, normally 4-spored; HYPHAE monomitic, 2-4 microns wide, thin-walled or slightly thick-walled, more or less encrusted, anastomoses especially in the rhizomorphs, somewhat nodulose in subhymenial area on old specimens, otherwise even, light brown in rhizomorphs and basally, otherwise colorless, clamp connections at all septa, (Eriksson), SPORES 3.5-4.5 x 2-2.4 microns, elliptic, smooth, inamyloid, colorless; BASIDIA 4-spored, 10-15 x 3-4.5 microns, clavate, with basal clamp connection; CYSTIDIA absent; HYPHAE monomitic: subhymenial hyphae 1.5-3.5 microns wide, thin-walled, with clamp connections, colorless, some sparsely encrusted; subicular hyphae 2-5 microns, thin-walled to thick-walled, with clamp connections, brownish, some encrusted, (Breitenbach), SPORES 3-4 x 2-2.5 microns, elliptic to short cylindric, flattened on one side, smooth, inamyloid, colorless; BASIDIA 4-spored, 10-12 x 4-4.5 microns, clavate; CYSTIDIA none, HYPHAE monomitic, subicular hyphae with abundant clamp connections, subhymenial hyphae 2-3 microns wide, "loosely arranged, with frequent branching", colorless, colorless to pale yellowish in KOH, thin-walled, basal hyphae 3-5 microns, light brown in KOH, walls thin to moderately thickened, "some lightly to heavily incrusted with a fine, pale brownish crystalline material", (Gilbertson), SPORES 3-4 x 2 microns, flattened on one side, colorless; hyphae 2.5 microns wide, pale brownish, nodose-septate [septa with clamp connections], sometimes encrusted, (Burt)
Notes:
Leptosporomyces fuscostratus has been found in BC, OR, ID, NS, ON, PQ, AZ, CO, CT, FL, IL, MA, MD, MI, MN, MO, NH, NM, NY, PA, and WI, (Ginns). It has also been found in Austria, Czechoslovakia, France, Italy, Portugal, Sweden, United Kingdom, Turkey, and the USSR, (Julich).
Habitat and Range
SIMILAR SPECIES
The rare Leptosporomyces montanus has larger spores (5.0-6.5 x 2.3-2.6 microns) and larger basidia (18-25 x 4-5 microns), but is otherwise similar, (Ginns(23)). Leptosporomyces galzinii has narrow hyphae (2-3 microns wide) (Ginns(23)). Leptosporomyces septentrionalis has longer spores (Ginns(23)). Leptosporomyces mutabilis has slightly longer spores, (Ginns(23)).Habitat
on the underside of dead conifer wood, according to the literature more rarely on hardwoods, (Breitenbach), on wood and bark of conifers (Eriksson), on bark of conifers, (Burt), on woody debris; on bark; Abies (fir), Acer (maple), Picea (spruce), Pinus (pine), Populus, Pseudotsuga (Douglas-fir), Thuja plicata (Western Red-cedar), (Ginns), fall, winter spring, (Buczacki)
Status Information
Synonyms
Synonyms and Alternate Names:
Helotium salicellum Fr.