Psilocybe fuliginosa

Psilocybe fuliginosa (Murrill) A.H. Sm.

Astylospora fuliginosa Murrill (1918)
Psathyra fuliginosa (Murrill) Murrill (1918)
Atylospora fuliginosa Murrill (1918)

Description: Following data comes from couple sources: Spores and comment are taken from Psilocybe fuliginosa species description in Mycologia 40 (6): 697. Pileus, stipe, lamellae, distribution and some of spores comes from Astylospora fuliginosa synonym description from Mycologia 10 (1): 25.

Macroscopic feat.:
  • Cap/Pileus: Hemispheric, not expanding, not umbonate, gregarious, 2 cm broad and 1 cm high; surface smooth, glabrous, hygrophanous, slightly striate, uniformly fuliginous, becoming somewhat paler on the disk; margin straight, eroded, concolorous.
  • Gills/Lamellae: Adnate, broad, ventricose, subcrowded, fuliginous, entire on the edges; spores usually ovoid, tapering at one end, smooth, purplish-brown, 7 x 4-5 µm.
  • Stem/Stipe: Equal or somewhat larger below, slender, smooth, glabrous, concolorous, whitish toward the base, 4-5 cm long, 1.5-2 mm thick.

Microscopic feat.:
  • Basidio/Spores: 6-7 x 4.5-5.5 µm, smooth, typically triangular in optical section but varying to ovoid or ellipsoid (as seen in face view), ellipsoid in side view, sordid yellowish brown when revived in KOH, with an obscure apical hyaline germ pore. Tapering at one end, purplish-brown, 7 x 4-5 µm

Distribution: Type collected in damp soil at Morce's Gap, near Cinchona, Jamaica, 1500 m elevation, December 29, 30, January 2, 1908-9, W.A. & Edna L. Murrill 748 (herb. N. Y. Bot. Gard.). Also collected at the same time and place, W.A. & Edna L. Murrill 680.

Comment: Dr. Burke has sent me material from Alabama which appears to belong here though the spores vary slightly, being somewhat longer. They range from 6.5 to 8 µm. For Psilocybe fuliginosa the habitat on bare earth, the dry pileus, shape of spores in face view, and fuligineous cast of the carphophore are apparently distinctive. Murril described it as Atylospora fuliginosa (Mycologia 10: 25, 1918).

source - [10 (1): 25, 40 (6): 697]

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