Psilocybe rhomboidospora (Atk.) A.H. Smith & Guzman, Beih. Nova Hedwigia 74: 189. 1983.
Photo/Copyright Machiel de Vos
macroscopy:
Pileus 10-18 mm broad, conico-convex with pointed centre, with deflexed margin, not distinctly hygrophanous, not translucently striate, warm reddish brown, entirely covered with paler fibrillose-floccose veil. Lamellae, L = 20-28, l = 3-5, moderately distant, broadly adnate with short decurrent tooth, reddish yellow with white, fimbriate edge. Stipe 20-40 x 1-2.5 mm, cylindrical, concolorous with pileus, entirely fibrillose-floccose with paler remnants of veil.
microscopy:
Spores 6.5-7.5(-8.0) x 4.5-6.5 x 4.0-4.5 µm, average 7.0-7.2 x 5.5 x 4.0 µm, Qf = 1.1-1.3-1.5, Qs = 1.65-1.75-1.8, strongly flattened, F/I > 75 %, mitriform to rhomboid in frontal view, ellipsoid in side-view, with thickened, brown walls, with large apical germ pore. Basidia 15-19 x 5.0-6.0 µm, 4-spored, clamped. Lamella edge sterile. Cheilocystidia 19-27 x 4.5-7.5 µm, lageniform with 2.0-4.0 µm wide, blunt apex. Hymenophoral trama irregular, made up of inflated elements with incrusted walls. Pileipellisa cutis with transitions to an irregular trichoderm, made up of cylindrical elements, 5.0-7.5 µm wide; subpellis subregular, made up of cylindrical to slightly inflated elements, 20-45 x 3.0-9.0 µm. Pigment brown, incrusting over a wide zone of pileipellis and subpellis. Stipitipellis a loose trichoderm of cylindrical hyphae, 2.0-6.0 µm wide with incrusted walls. Clamp-connectionspresent in all tissues.
ecology:
saprotrophic on herbaceous and woody debris in a tropical hothouse.
distribution:
In Europe found only once in a orchid hothouse in Flevoland, The Netherlands.
