Psilocybe ruiliensis is a species of
psilocybin mushroom in the family
Hymenogastraceae. Described as new to science in 2016, it is found in
Yunnan province of southwest
China. The species epithet, 'ruiliensis', is a reference to the location
Ruili where the type collections were found. The
type specimens were growing solitary to scattered in grasslands in which cows and horses had previously grazed.[1]
Description
Cap: 10–20 mm (0.39–0.79 in) in diameter; conic to almost plane, with or without umbo or small acutely papillate at the disk; brownish-yellow (often with reddish tinge); hygrophanous and translucently striate when moist, watery brown when wet; sometimes bruising blue when damaged or mature; cortinate white veil and sometimes small scales when young.
Gills: Yellowish or beige when young, chocolate brown in age (gray-purple or purple tinge), with adnate to subsinuate or adnexed attachment; edges serrulate and slightly wavy.
Spores: Brown with purple tinge (in water); ellipsoid to subhexagonal; smooth and slightly thick-walled, sometimes containing 1–2 oil drops; 9–11 by 6–7.5 μm.
Stipe: 27–62 mm (1.1–2.4 in) long, 1.5–3.5 millimetres (0.059–0.138 in) thick; yellow-white to brownish, sometimes bruising bluish when damaged; central or occasionally slightly eccentric; fibrillose; hollow; annulus absent; equal to slightly enlarged bulbous base. Stem base with rhizomorphic white mycelium.
Odor: Slightly grassy.
Microscopic features: Larger hexagonal and subrhomboid basidiospores (9.6–12.0 by 6.4–8.4 μm); ventricose-lageniform cheilocystidia and pleurocystidia.