Gerhardt Key: Species of the subgenus Panaeolus, section Panaeolus
Stem without annulus, rests of the veil visible as dentate or appendiculate margin of the cap. Sulphidia present at the side of gills (fig. 4 c); cap distinctly hygrophanous = Panaeolus rubricaulis
Panaeolus rubricaulis petch 1925
Synonyms: Panaeolus indicus, Panaeolus campanuloides.
Distribution: Asia (Vietnam, Sri Lanka)
Description by Gerhardt:
(After original diagnosis, petch 1925):
Pileus 1-2(4) cm wide, thimble down to conical glockig, convex, on the edge with bright, transient Velum residues (similar p. papilionaceus);
Cap skin dry, smooth, or at the top rugos; hygrophan; Colour moist Brown until grauschwarzlich, ausblassend with a lighter margin, drying.
Lamellae gray to black, with weblicher Schneidge, relatively away standing, bulge, ascending broadly grown.
Stalk up to approx. 100 × 2 mm, cylindrical; Colour reddish brown to purple brown, top web frosting, against the base web tomentose.
(Type of studies):
Spores 12-15 × 9-10(11) x 7-8 microns, smooth, opaque, clear abgeplattet Keimporus straight, slightly preferred (identical in shape and color with cyanescens).
Cheilocystidia hyaline, bulge-bottle shape, ca. 30-40 × 7-8 microns long keulig up spindelig bulbous, listeners with a small tip.
Basidia 4-spore, approximately 25 microns long.
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