Scientific name: Agrocybe acericola (Peck) Singer
Derivation of name: Acer- refers to "maple", a
common substrate for this fungus.
Synonyms: Agaricus acericola Peck; Pholiota
Common name(s): Maple Agrocybe
Occurrence on wood substrate: Saprobic; solitary to
scattered on decaying deciduous logs and stumps and
on wood chips in urban areas;
April through September.
Dimensions: Caps are 3-10 cm wide; stalks are 5-10
cm long and 0.5-1 cm thick.
Cap: Ochre-yellow when young, fading to tan in age;
moist or dry but not sticky, smooth or wrinkled when
fresh, becoming dry,
cracked and fissured with age.
Gills: Attached; off-white when young, becoming
Spore print: Cinnamon to rust.
Stipe: Whitish at first, becoming brownish with age;
rhizomorphs at the base.
Veil: White membranous ring at first, staining
by the spores; persistent as large,
Comments: May be quite common in urban areas on
hardwood chips used in landscaping. A cluster of
closely related species exists (Agrocybe praecox
cluster) which may include A. acericola.The
Figures 5 and 6 were identified as
members of this
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Figure 1. Note the close gills and persistent ring staining
the color of the spores.
Photo © John
Figure 2. Maple agrocybe. Photo © Steve Nelsen.
Figure 3. Note the white rhizomorph at the base of the
stem of the inverted specimen.
Photo © Steve Nelsen.
Figure 4. A specimen collected at a foray. The partial veil is
collapsed about the stem and is the color of the spores
deposited on it. Photo © Gary Emberger.
Figure 5. Specimen in the Agocybe praecox complex
growing on wood chips. Photo © Dorothy Smullen.
Figure 6. Agrocybe dura, another member of the
Agrocybe praecox complex. A. dura is described as a
strict saprotroph of grass litter.
Photo © John Plischke III.