Psathyrella gracilis (Fries) Quëlet
Champ. Jura et Vosges 152. 1872.

Common Name: none

• Pileus

  Cap 1.0-4.0 cm broad, obtuse-conic, campanulate to convex-umbonate at maturity, margin striate at first, obscurely so in age; surface moist, hygrophanous, medium-brown fading to pale buff-brown, the disc usually dingy yellowish-brown; flesh very thin, colored like the cap, unchanging; odor indistinct, taste, mild.

• Lamellae

  Gills adnexed, moderately broad, close to crowded, pale dingy-buff, becoming brownish-grey in age.

• Stipe

  Stipe 4-8 cm tall, 1.5-3.0 mm thick, slender, thin, fragile, stuffed at maturity; more or less equal, sometimes twisted, occasionally continuing as a pseudorhiza with sparse white mycelium and adhering substrate; surface pruinose at the apex, often colored purple-brown from adhering spores, smooth elsewhere and concolorous with the cap; veil absent.

• Spores

  Spores 11-13 x 5.5-7.0 µm, elliptical, smooth, with an apical pore; spore print purple-brown.

• Habitat

  Gregarious or in large troops in disturbed habitats, e.g. wood chips, leaves, open grassy areas; fruiting year-round when moisture is available but especially abundant from late fall to mid-winter.

• Edibility

  Unknown.

• Comments

  This slender Psathyrella, ubiquitous to our urban parks, often fruits in vast numbers in chip beds along with Hypholoma aurantiaca and Tubaria furfuracea. Although fragile and short-lived, it can be found throughout the mushroom season, fresh flushes appearing after rains. Psathyrella gracilis is recognized by a brown hygrophanous cap (striate when fresh) that soon fades to pale buff-brown, the disc usually dingy yellowish-brown, and a slender stipe with a pruinose apex. Panaeolus foenisecii is very similar but occurs in grass during the warm months of the year and has mottled gills at maturity. Psathryrella longipes is a larger cousin of P. gracilis with an appendiculate cap margin.

• Other Descriptions and Photos
  • Boleslaw Kuznik: Psathyrella gracilis (CP)
  • Boleslaw Kuznik: Psathyrella gracilis (CP)
  • Fred Stevens: Psathyrella gracilis (CP)
  • Michael Wood: Psathyrella gracilis (CP)
  • Arora (1986): p. 365 (D & P)
  • Breitenbach & Kränzlin (vol. 4): sp. 330
  • Phillips: p. 203 (D & CP)
  
  

  (D=Description; I=Illustration; P=Photo; CP=Color Photo)