What You Should Know
Hohenbuehelia mastrucata can be distinguished by its pleurotoid shape, brownish-gray to grayish cap covered with a tomentum of white to cream-colored scales, white spores, and a distinct gelatinous layer under the cap cuticle. It is rare and found on the deadwood of maples and other hardwoods in eastern North America.
Hohenbuehelia mastrucata Mushroom Identification
Saprobic on the deadwood of hardwoods (especially maples); growing alone or in overlapping clusters; summer and fall; widely distributed in eastern North America.
2-7 cm wide; convex with an inrolled margin, becoming planoconvex or flat; semicircular to kidney-shaped in outline; rubbery and moist; covered with thick, gelatinous spines with blunt tips; dark brownish gray or bluish-gray, fading to grayish.
Close or nearly distant; white to pale grayish.
Grayish or whitish; rubbery.
Odor and Taste
Odor not distinctive, or mealy; taste not distinctive or slightly foul.
KOH on cap surface negative.
Spores 7-9 x 4-5.5 µ; more or less elliptical; smooth; inamyloid. Cheilocystidia often clavate-capitate; to 45 x 7 µ. Pleurocystidia ("metuloids") abundant; lanceolate; to 100 x 20 µ; developing very thick walls and apical encrustations. Pileipellis a thin cutis-like tangle above a thick zone of gelatinized hyphae. Clamp connections are present.
Hohenbuehelia grisea is smaller, with a dark gray patchy-tomentose cap, features a smooth, velvety, or hairy cap surface that lacks gelatinous spines.
Hohenbuehelia mastrucata Synonyms
Hohenbuehelia atrocaerulea var. mastrucata (Fr.) Krieglst.
Calathinus mastrucatus (Fr.) Quél., 1886
Pleurotus mastrucatus (Fr.) Sacc., 1887
Dendrosarcus echinatus (Sowerby) Kuntze, 1898
Acanthocystis mastrucata (Fr.) Konrad & Maubl., 1949
Geopetalum mastrucatum (Fr.) Kühner & Romagn., 1953
Hohenbuehelia atrocoerulea var. mastrucata (Fr.) Krieglst., 2000
Pleurotus hollandianus Sumst., 1906
Acanthocystis hollandianus (Sumst.) Singer, 1943
Photo 1 - Author: Rocky Houghtby (Creative Commons Attribution-Share Alike 3.0 Unported)
Photo 2 - Author: Rocky Houghtby (Creative Commons Attribution-Share Alike 3.0 Unported)
Photo 3 - Author: Josh M.K. (suchen) (Creative Commons Attribution-Share Alike 3.0 Unported)
Photo 4 - Author: Josh M.K. (suchen) (Creative Commons Attribution-Share Alike 3.0 Unported)
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