Details about map content are available here Click on the map dots to view record details.
Species Information
Summary: Features include 1) medium size, 2) a petal-shaped to mussel-shaped or fan-shaped, often lobed, non-viscid cap that is yellowish brown to olive yellow and is downy at first becoming smooth, 3) whitish to ochraceous flesh, 4) yellowish to pinkish-buff gills radiating from the base of the cap and often crimped and forked or connected by cross veins, 5) absent or minimal stem, 6) growth on conifer wood, and 7) a yellowish-buff to brown or dingy ochraceous spore deposit. The description derived from Arora(1) except where noted.
It has been reported from WA (Edmonds(1)) and CA (Arora(1)). There are collections from BC at the University of British Columbia, and from WA and OR at Oregon State University. The University of Washington has collections from WA, ID, OR, CA, MI, NH, and NY.
Cap: 1.5-7(10)cm, petal-shaped to mussel-shaped or fan-shaped, "margin often lobed and at first incurved"; buff to dingy yellowish, yellow-brown, olive-yellow, or dingy ocher; "minutely hairy or downy becoming smooth, not viscid"
Flesh: thin, soft; whitish to ochraceous
Gills: "radiating from base of cap, close", "often crimped and forked or connected by cross-veins, especially toward base"; pale or dingy yellowish to ocher or pinkish buff
Stem: absent or present only as a small, narrowed, laterally attached base
Veil: absent
Odor: not distinctive (Bessette), none or pleasant (Miller)
Taste: not distinctive or slightly bitter (Bessette), pleasant (Miller)
Microscopic spores: spores 4-6 x 3-4 microns, elliptic, smooth, many dextrinoid, (Arora), spores 4.5-6(6.5) x 3-3.5(4.5) microns, oval, smooth, iodine-negative, yellowish, with droplets; basidia 4-spored, 26-45 x 5.5-8.5 microns, clavate, with basal clamp connection; cystidia none, but clavate to fusiform marginal cells present; cap cuticle of irregular, in part erect hyphae 2-6 microns wide; clamp connections mentioned for basidia and cap cuticle, (Breitenbach)
Spore deposit: yellowish buff to brown or dingy ochraceous, (Arora), light brown (Breitenbach), pale brown to yellowish brown (Miller)
Habitat / Range
single or in groups or clumps on coniferous logs, stumps, debris, mine timbers, humus rich in lignin, (Arora), "scattered or in overlapping clusters on decaying conifer wood", May to November, (Bessette), on conifer logs, wood chips, and rich accumulations of humus, (Trudell), spring, summer, fall
Similar Species
Crepidotus or Phyllotopsis can look similar but in Tapinella panuoides, the gills are usually forked or veined, (Arora(1)). Hygrophoropsis aurantiaca group has oranger gills, a stem, and a white spore deposit, (Arora). Fruiting bodies of similar shape often have differently colored spore deposit (Panus, Pleurotus, Lentinellus, and Hohenbuehelia).
