Pileus (Cap): 2-4.5 cm broad, convex or bell shaped; margin striate; surface smooth, sticky when moist, hygrophanous, brown, hygrophanous fading to yellow-brown or buff; flesh thin, brittle in age, bruising blue.
Lamellae (Gills): Adnate to seceding, close when young, subdistant in age, pale cinnamon brown, becoming dark grey-brown, edges lighter than the faces, mottled from spores at maturity.
Stipe (stem): 3-6 cm tall, 3-6 mm thick, equal to sometimes enlarged at the base, the latter with conspicuous thickened mycelium (rhizomorphs); surface white, smooth to silky, bruising blue; veil fibrillose, forming a superior, evanescent hairy, annular zone.
Microscopic Features: Purple-brown to purple-gray or purple-black; Spores 9-13 x 6-9 um, elliptical, smooth, with an apical pore.
Season: Much Like P. cyanescens they prefer the cold tempuratures of fall and usually are found late september into december, and October through January in California.
Habitat and Distribution: Much like P. cyanescens they like the mulch and wood chipped areas. "Being a bit south helps (Tacoma and south Washington)" (NeoSporen). They are largely seen in the San Francisco Bay area of California where they get their name from. Daniel Barringer MO Occurrence Map Growth Habit: Growing gregariously or in cespitose clusters.
Bruising: Bruising when handled. Especially in the cap margin.
Other Notes: In the book Mycelium Running by Paul Statements it says "microscopically, they seem identical to P. cyanescens, leading me to believe that these are probably P. cyanescens, and that this species is simply highly variable in macromorphology". This species has been very well documented by amateur mycologists, however it has not been officially described and thus has no scientifically accepted species name at this time. The nic name %u201CCyanofriscosa%u201D was coined by a member of the website www.Shroomery.org a couple years ago when other Bay Area hunters began finding them. Other common names have been used to describe this mushroom, such as the %u201CCyclone Psilocybe%u201D, coined by Paul Stamets due to an instance in which the mycelial pattern of an agar culture looked like a spiral.