Psilocybe aquamarina

Psilocybe aquamarina (Pegler) Guzmán


synonyms:
Stropharia aquamarina Pegler, Kew Bull 1977

The study of the holotype [Pegler 370 (K), from Africa: Kenya, Central Province, South Nyeri Distr., S side of Ml. Kenya, Castle Forest Station, near Thiba River, on soil] shows a fungus with spores (9-) 9.5-11 (-12) x 6.5-7 (-7.5) x (5-) 5.5-6 µm, subrhomboid in face view and subellipsoid in side view, without pleurocystidia, cheilocystidia (20-) 22.5-34 (-36) x 7-11 (-12) µm, fusoid ventricose or vesiculose submucronate and gelatinized pileus with hyaline hyphae 1.5-2.5 (-3) µm wide. The basidiomata (two) are of the same colour as in P. cubensis, with pileus convex subumbonate and stipe with an annulus persistent. Blue tones are seen in the annulus and in some parts of the stipe. Pegler (1977) related this species to P. aerugineomaculans Hˇhnel, which differs in the size of the cheilocystidia, as well as in habitat. The absence of pleurocystidia places this fungus in the genus Psilocybe, and its annulus and possibly a blue reaction relate it to Sect. Stuntzii Guzmán.

source - Bibliotheca Mycologica [159: 109-110]

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