Hohenbuehelia petaloides (Bull.) Schulz.
Verh. zool.-bot. Ges. Wein. 16: 45. 1866.

Common Name: none

Synonym: Pleurotus petaloides

• Pileus

  Cap 3-6 cm broad, up to 8 cm long, fan-shaped to petaloid, margin incurved, undulate, splitting in dry weather; surface smooth, dry, dark-brown, fading to dull tan in age; flesh thin, pliant, with a gelatinous layer.

• Lamellae

  Gills decurrent to near the stipe base, crowded, white to greyish, narrow, edges finely pubescent.

• Stipe

  Stipe eccentric, 1.5-5 cm long, 2-3 cm thick, tapering to the base; surface pallid to dull tan, densely pubescent, thickened white mycelium (rhizomorphs at the base); veil absent.

• Spores

  Spores 7-8.5 x 4.5-5 µm, elliptical, smooth, nonamyloid; spore print white.

• Habitat

  Solitary, scattered to clustered in lignicolous-rich soils or wood chips; fruiting from late summer in watered areas to mid-winter.

• Edibility

  Edible, but of little culinary value.

• Comments

  This oyster mushroom look-alike was once placed in Pleurotus, but was moved into its own genus because the cap was shown to have a distinctive gelatinous layer and the gills, large, thick-walled cheilocystidia. The latter character, which gives the gill edges a pubescent aspect, plus the tendency to grow on wood chips as opposed to logs, helps to distinguish it from Pleurotus ostreatus and its close relatives. Paxillus panuoides, another Pleurotus look-alike, is also occasionally found in wood chips. It, however, has a yellowish-brown cap and gills, the latter which are easily separated from the cap, and yellowish to pale-buff spores.

• Other Descriptions and Photos
  • Fred Stevens: Hohenbuehelia petaloides (CP)
  • Fred Stevens: Hohenbuehelia petaloides (CP)
  • Fred Stevens: Hohenbuehelia petaloides (CP)
  • Fred Stevens: Hohenbuehelia petaloides (CP)
  • Tom Volk's Fungus of the Month: Hohenbuehelia petaloides (D & CP)
  • Mushroom Observer: Hohenbuehelia petaloides (CP)
  • Arora (1986): p. 136 (D & CP)
  • Lincoff: p. 760 (D), plate 433 (CP)
  
  

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