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Summary: Features include 1) viscid or slimy cap that is yellow brown to greenish yellow with dark brown to olive-brown center, or sometimes olive-brown overall, or (especially near the margin when old) developing orange tones, 2) decurrent, subdistant to distant gills that are white, then pale yellow, then colored like cap margin, 3) glutinous stem that is silky yellowish above the fleeting ring zone, and variously colored below it, and 4) preference for pine habitat. It is fairly common. "H. hypothejus is our most common Hygrophorus under two-needle pines during wet weather in the fall." (Hesler, with Latin names in italics). H. hypothejus was reported from BC by Bandoni(1). Hesler(1) examined collections from WA, OR, ID, and also AL, CA, CO, DC, FL, GA, MA, MI, NC, NY, TN, Belgium, Germany, Netherlands, Sweden, and United Kingdom. Breitenbach(3) reported it from Switzerland.
Cap: 2-8cm across, convex to broadly umbonate, flat or depressed; color variable, typically dark brown to olive-brown at center and greenish yellow to yellow ocher at margin when young (but sometimes entirely olive-brown), often developing yellow-orange to reddish-orange tones when old, especially near margin; viscid or slimy when wet, smooth, (Arora), 2-8cm across, slightly umbonate, then may become convex to flat, sometimes with elevated margin; '"bone brown" to "olive brown" on disc, elsewhere "pale dull green-yellow," "yellow ocher," "buckthorn brown," or "Vandyke brown", colors becoming brighter in age ("straw yellow" to "ochraceous orange" or occasionally "scarlet" in extreme age near the margin), disc remaining more or less dark olive brown'; glutinous, bald or somewhat agglutinated-fibrillose near margin, (Hesler)
Flesh: thin; yellowish to whitish, (Arora), thin; yellowish near cap surface, watery whitish above gills, in stem whitish but yellowish near exterior, (Hesler)
Gills: decurrent or occasionally adnate, well-spaced, thick, soft, waxy; "at first pallid but soon becoming pale yellow", and when old sometimes brightly colored like cap margin, (Arora), decurrent, subdistant to distant, narrow to moderately broad; white at first but soon becoming pale yellow, and finally more or less colored as cap margin, (Hesler)
Stem: (3)5-15cm x 0.5-1.5(2)cm, equal or narrowing downward; yellow at top, "otherwise pallid or variously colored (like cap)"; viscid or slimy when moist, (Arora), (2.5)8-16cm x (0.3)0.6-1.2(1.5)cm, narrowing slightly downwards, solid; upper area yellowish, lower part variously colored, olive brown, olivaceous yellow, bright yellow, orange, or scarlet; glutinous in lower two thirds, upper area silky, subapical fibrillose, fleeting ring zone, (Hesler)
Veil: evanescent [fleeting], leaving slime on stem and sometimes an obscure fibrillose ring, (Arora), partial veil floccose and leaving subapical, fibrillose, evanescent ring zone, (Hesler)
Odor: mild (Arora), not distinctive (Hesler)
Taste: not distinctive (Hesler)
Microscopic spores: spores 7-9 x 4-5 microns, elliptic, smooth, (Arora), spores 7-9 x 4-5 microns, elliptic, smooth, inamyloid; basidia 4-spored, 42-60 x 6-7 microns; pleurocystidia and cheilocystidia none; gill tissue divergent; clamp connections present in cap cuticle and gill trama, (Hesler)
Spore deposit: white (Arora)
Habitat / Range
scattered to gregarious or in troops under conifers particularly Pinus (pine), (Arora), gregarious under conifers, June to December, (Hesler), scattered to numerous, "in bogs and under conifers, often 2-needle pines", (Lincoff), summer, fall, winter
Hygrophorus discoideus differs in having a more ocher-colored to orange-brownish cap with a darker center, (Breitenbach). Hygrophorus olivaceoalbus var. olivaceoalbus has a white stem sheathed in its lower part with blackish fibrils and occurs in spruce forests. Hygrophorus aureus differs by having a bright orange cap and is rare if present in North America, but colors intergrade with those of H. hypothejus. Hygrophorus fuligineus has blackish brown to brownish olive cap, (Lincoff(2)).
Hesler(1) (colors individually in quotation marks from Ridgway(1)), Arora(1)*, Lincoff(2)*, Kibby(1)*, Courtecuisse(1)*, Bessette(2)*, Barron(1)*, Stuntz(4), Bandoni(1), Breitenbach(3)*, Trudell(4)*, Bacon(1)*, Buczacki(1)* References for the fungi
Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2020. E-Flora BC:
Electronic Atlas of the Plants of British Columbia [eflora.bc.ca]. Lab for
Advanced Spatial Analysis, Department of Geography, University of British
Columbia, Vancouver. [Accessed:
2020-07-11 11:09:07 AM
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