E-Flora BC: Electronic Atlas of the Flora of British Columbia

Tricholoma aurantium (Schaeff.) Ricken
veiled Tricholoma
Tricholomataceae

Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.

Introduction to the Macrofungi

© Adolf Ceska  Email the photographer   (Photo ID #18626)

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Distribution of Tricholoma aurantium
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Species Information

Summary:
distinguished by viscid orange to orange-brown or red-brown or olive-splashed cap, rusty stained gills, line near apex of stem that suggests a rudimentary veil, and strong farinaceous odor; O'Dell reports for WA; collection by Paul Kroeger for BC at Pacific Forestry Centre, reported from ID by Andrew Parker, pers. comm., Bessette(5) says widely distributed in North America and shows photographs from CO and WV
Cap:
4-10cm across, convex becoming obtusely umbonate or flat, margin inrolled when young; "yellow-orange to tawny, bright rusty-orange, orange-brown, orange-tan, or even orange-red, sometimes splashed with olive-green or in one form entirely deep olive-green when young"; "viscid when moist, smooth or breaking into small scales (especially at center)", "sometimes beaded with orange droplets when moist", (Arora), 3.5-10cm across, convex with inrolled margin becoming flat-convex when old; "orange, particularly at margin, to reddish brown, often with olive coloration over disc"; viscid, nearly bald, often with orange droplets at margin, (Shanks)
Flesh:
thick; white, (Arora), white in cap and stem, (Shanks)
Gills:
adnate to adnexed or notched, close; whitish, often developing rusty brown or reddish brown spots and stains, (Arora), sinuate, close to crowded, thin; "whitish, staining orange-brown", (Shanks)
Stem:
3-8cm x 0.8-2cm, equal or wider at either end, solid, firm; belted with rusty orange scales or scurfy flakes up to a well-defined line near top, pallid above this line; "in wet weather sometimes beaded with orange droplets near the line", (Arora), 4-8cm x 1-3cm, equal, solid; with belts of orange fine scales, the fine scales staining greenish in older fruitbodies, a faint ring zone present near top, which lacks the surface ornamentation of the rest of the stem, (Shanks)
Veil:
absent or very rudimentary (Arora), a faint ring zone near top of stem, (Shanks), veil present as a colored sheath on stem which terminates in a line but no actual veil tissue present to form a ring, only a line visible, (Smith)
Odor:
strongly farinaceous and disagreeable (like rancid oil or cucumber), (Arora), farinaceous, (Shanks), cucumber (Courtecuisse), "disagreeable, strong, as old meal or corn silk", (Miller)
Taste:
strongly farinaceous and disagreeable (like rancid oil or cucumber), (Arora), farinaceous, cap cuticle may be bitter, (Shanks), bitter (Courtecuisse)
Microscopic spores:
spores 4-6 x 3-5 microns, elliptic to nearly round, smooth, [presumably inamyloid], (Arora), spores 4.8-6 x 2.5-3.2 microns, elliptic, smooth, inamyloid, colorless; basidia 4-spored, 22-34 x 5-7 microns, clavate; cheilocystidia "absent or present as occasional filamentous hyphae" 3-4 microns wide extending beyond the margin; cap cuticle an ixocutis, hyphae 3.2-3 microns wide, colorless or with refractive orange-brown contents, smooth; clamp connections absent, (Shanks)
Spore deposit:
white (Arora)

Habitat / Range

single or scattered on ground in woods, (Arora), single to gregarious in mixed woods, (Shanks), summer and fall (Miller)

Taxonomic and Nomenclatural Links

Additional Range and Status Information Links

Edibility

unpalatable (Arora)

Additional Photo Sources

Related Databases

Species References

Shanks(2), Arora(1)*, Phillips(1)*, Lincoff(2)*, Miller(14)*, Kibby(1)*, Courtecuisse(1)*, Bessette(2)*, Smith(6), Barron(1)*, O'Dell(1), Buczacki(1)*, Bessette(5)*

References for the fungi

General References