Summary:
Hygrophorus odoratus has a strongly aromatic odor, somewhat as in Hygrophorus agathosmus (almonds). Other features include a viscid, gray cap, decurrent, distant, broad gills that are whitish becoming creamy, and a dry pallid stem. Some collections identified as H. agathosmus are actually H. odoratus when DNA is studied. The description is derived from Hesler(1).
Collections were examined from OR (including the holotype) and ID (Hesler(1)). There is a collection from BC at the University of British Columbia by Paul Kroeger. DNA from a WA collection found at the North American Mycological Association meeting in 2014 shows a 100% sequence match with the holotype sequence (D. Miller, pers. comm.). A photograph is consistent but Morphological features need to be correlated.
Cap:
2-4cm across, obtuse to broadly convex, becoming flat or disc slightly depressed and margin arched; dark ashy gray over disc, paler gray to pallid along margin, when old with faint ochraceous tinge throughout; viscid, fibrillose-streaked to matted-fibrillose under viscidity
Flesh:
soft; pallid
Gills:
decurrent, distant, broad; whitish becoming creamy, unchanging when bruised
Stem:
4-8cm x 0.3-0.6cm at top, equal or narrowing downward; pallid at first, unchanging with bruising but drying with faint ochraceous tinge; dry, bald, faintly silky at top
Odor:
strongly aromatic, somewhat as in Hygrophorus agathosmus [almonds]
Microscopic spores:
spores 11-14 x 6.5-8 microns, elliptic, smooth, inamyloid; basidia 4-spored, 40-62 x 8-10 microns; pleurocystidia and cheilocystidia not seen; gill tissue divergent; clamp connections present in gill trama and cuticular hyphae
Spore deposit:
[presumably white]
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