Name: Psilocybe caerulescens
Citation: Mycologia 15(1): 20 (1923)
Deprecated Synonyms: Psilocybe villarrealiae Guzmán, Psilocybe weilii Guzmán, Stamets & F. Tapia, Psilocybe mixaeensis R. Heim, Psilocybe mazatecorum R. Heim, Psilocybe caerulescens var. nigripes R. Heim, Psilocybe bispora Guzmán, Franco-Mol. & Ram.-Guill., Psilocybe caribaea Guzmán, T.J. Baroni & Tapia, Psilocybe heliconiae Guzmán, Saldarr., Pineda, G. García & L.-F. Velázquez, Psilocybe wrightii Guzmán, Psilocybe ombrophila, Psilocybe subannulata E. Horak & Guzmán, Psilocybe caerulescens var. weilii
https://archive.org/... (Murrill’s notes)
http://www.cybertruffle.org.uk/cyberliber/02903/0837.htm (Trotter notes based on Murril’s)
“Pileus convex, slightly umbonate, gregarious or cespitose, 5-7cm. broad; surface glabrous, slightly viscid when wet, becoming radially striate on the margin, light-dirty-yellowish-brown with a metallic luster suggesting some alloy of brass, darker on the disk, bluish when bruised or handled; context white, tough, unchanging, continuous with the stipe, with a farinaceous odor when cut, and no characteristic taste; lamellae sinuate-adnexed, light-yellow at first, dark-purplish-brown at maturity; spores broadly ovoid or subglobose, smooth, avellanous with a yellowish tint under the microscope, very distinctive both in color and in shape, about 7 × 5.5µ; stipe flexuous, equal, pruinose, hollow, concolorous, white at the apex, turning blue when cut, reaching 9 cm. in length and 1 cm. in thickness.” (Murrill, 1923).