AppearanceThe pileus is typically 5–14 mm in diameter, initially resupinate, then later turned up. It is attached dorsally or laterally to the substrate. Fan- or kidney-shaped, it is dry, white, and covered with a layer of soft hairs which may or may not be matted. The outer edge is rolled slightly inwards. The context is thin, soft, and white. Both the odor and taste of this mushroom are mild.
The gills radiate from an eccentric or lateral point of attachment, medium broad, and tend to swell in the middle. The gill spacing is sub-distant, with many short gills that do not reach the attachment point. The gills are initially white, then later tinged a rusty-brown color. The spore print is cinnamon-brown in color.
This species has no stipe, although it may have a small tubercle attaching it to its growing surface.
Naming''Crepidotus applanatus'', the so-called "flat crep", is larger, with a shell-shaped cap, more closely spaced gills, and has conspicuous white mycelial threads at the point of attachment. ''C. herbarum'' has smaller spores and a pale-yellowish spore print.
DistributionThis species may usually be found on the bark of deciduous wood in damp, shaded places. In the Pacific Northwest, it is known to grow on ''Abies'', ''Acer'' and ''Populus'' trees.
HabitatThis species may usually be found on the bark of deciduous wood in damp, shaded places. In the Pacific Northwest, it is known to grow on ''Abies'', ''Acer'' and ''Populus'' trees.
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