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Trichaptum biforme

mushroomexpert.com/Trichaptum_

Ecology: Saprobic; growing in overlapping clusters on hardwood logs and stumps; late spring, summer and fall; found in all 50 of the United States and all the Canadian provinces; in eastern North America it is one of the most commonly encountered fungi. Trichaptum biforme is a voracious decomposer of dead wood. It causes a straw colored sapwood rot in standing trees.

Cap: Up to 6 cm across and 3 mm thick; more or less semicircular, irregularly bracket-shaped, or kidney-shaped; flattened-convex; hairy, finely hairy or fairly smooth; with zones of whitish to grayish white colors; the margin sometimes pale lilac.

Pore Surface: Purple to lilac, with the strongest shades near the margin; fading to buff or brownish in age; with 3-5 angular pores per mm; usually eroding and developing spines or teeth with maturity (sometimes appearing more like a toothed mushroom than a polypore); not bruising.

Stem: Absent.

Flesh: Whitish; tough and leathery.

Chemical Reactions: KOH negative to pale yellowish on flesh and cap surface.

Spore Print: White.

Microscopic Features: Spores 6-8 x 2-2.5 ; smooth; cylindric to slightly allantoid; hyaline in KOH; inamyloid. Cystidia abundant; up to 35 x 5 ; more or less fusoid; apically encrusted. Hyphal system dimitic.

#mushrooms#fungi#mycology

Morchella prava

mushroomexpert.com/Morchella_p

Ecology: Possibly saprobic and mycorrhizal at different points in its life cycle; growing alone, scattered, or gregariously under various hardwoods and conifers, often (but not always) in sandy soil near bodies of water (lakes, rivers); April, May, and June; apparently widely distributed in northern North America (DNA verified from Montana to Saskatchewan, South Dakota, Michigan, and Ontario).

Cap: 3-6 cm tall and 2-5 cm wide; irregularly shaped but often more or less egg-shaped with a slightly narrowed or widely conical apex; pitted and ridged, with the pits randomly arranged and oriented and irregular in outline; when young with bald or finely velvety, flattened or widely rounded, pale yellowish to whitish ridges and medium to dark gray or black pits; when mature with bluntly rounded to sharp or eroded, brownish yellow to yellowish brown ridges and similarly colored pits (but often remaining in the "gray stage" for a prolonged period and apparently never maturing); attached to the stem directly, without a groove; hollow.

Stem: 2.5-4 cm high and 1-3 cm wide; equal above a slightly swollen base; whitish to yellowish; often discoloring reddish brown; bald or nearly so; hollow.

Microscopic Features: Spores (16-) 17-21 (-24) x (8-) 10-12 <NOBR>(-13) ;</NOBR> smooth; elliptical; without oil droplets; contents homogeneous. Asci 8-spored. Paraphyses cylindric with variable apices; septate; hyaline to brownish or brown in KOH. Elements on sterile ridges scattered and infrequent (often difficult to locate or distinguish from paraphyses); 75-125 x 7.5-37.5 ; septate; hyaline to ochraceous, brownish, or brown in KOH; terminal cell widely cylindrical with a rounded, subcapitate, capitate, subclavate, clavate, or widely subfusiform apex.

#mushrooms#fungi#mycology

Urnula craterium

mushroomexpert.com/Urnula_crat

Ecology: Saprobic on sticks and small logs (often buried) of hardwoods; growing alone, scattered, or in dense clusters; spring; widely distributed east of the Rocky Mountains. The illustrated and described collections are from Illinois, Virginia, and Qu&#233;bec.

Fruiting Body: 5-9 cm high; 3-9 cm across; at first shaped like a deep cup or an urn with a vaguely defined stem portion; often expanding to goblet-shaped or cup-shaped with age.

Fertile (upper, or inner) surface: Dark brown to gray or nearly black; smooth and bald.

Sterile (lower, or outer) surface: Brown to gray or nearly black; bald, roughened, or scaly; often becoming finely cracked with age&mdash;or with pigments breaking up to form chevron-like or nearly reticulate patterns; the margin becoming lacerated and tattered.

Pseudostem: Poorly defined at apex; 3-6 cm high; 0.5-1.5 cm wide; tapering to base; black; fuzzy toward the base.

Flesh: White; tough; unchanging when sliced.

Odor: Not distinctive.

Chemical Reactions: KOH on fertile surface greenish black.

Microscopic Features: Spores 21-35 x 9-13 m; ellipsoid to elongated-ellipsoid; smooth; hyaline in KOH. Asci 8-spored; 150-300 x 10-15 m; cylindric; hyaline in KOH. Paraphyses 125-325 x 2-4 m; filiform with rounded, subacute, or subclavate apices; smooth; septate; either hyaline, solitary, and projecting beyond the asci&mdash;or with agglutinated brown apices, bundled, and not projecting. Excipular surface elements cylindric; 2.5-6 m wide; septate; walls black to dark brown in KOH; smooth or a little encrusted; occasionally branching and/or developing lobes or nodules.

#mushrooms#fungi#mycology

Entoloma caccabus

mushroomexpert.com/Entoloma_ca

Ecology: Saprobic; growing gregariously in bare soil under northern red oak, white oak, hop hornbeam, and persimmon; July; Coles County, Illinois.

Cap: 1-3 cm; planoconvex with a slightly incurved margin at first, becoming shallowly depressed, with a wavy margin and a small umbo; moist; bald; dark grayish brown to dark yellowish brown at first, fading markedly to medium yellowish brown (but often retaining a darker center); the margin becoming slightly translucent-lined with age.

Gills: Attached to the stem; nearly distant; whitish at first, becoming pink; short-gills frequent.

Stem: 2.5-3.5 cm long; 2-4 mm thick; equal; dry; bald or finely silky; whitish to grayish or brownish.

Flesh: Thin; insubstantial; watery whitish to brownish.

Odor and Taste: Mealy.

Chemical Reactions: KOH on cap surface negative.

Spore Print: Pink.

Microscopic Features: Spores 7-10 x 6-8 ; 5- to 6-sided; heterodiametric or occasionally nearly isodiametric; angular; smooth; hyaline. Hymenial cystidia absent. Pileipellis a cutis; elements 5-12.5 wide, brown to brownish in 10% ammonia, with intracellular pigment. Clamp connections present.

#mushrooms#fungi#mycology