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Summary: Russula brevipes is recognized by its dull white color, centrally depressed cap with inrolled margin when young, hard stem, and crisp flesh that does not blacken or redden when bruised, (Arora). Russula brevipes is often parasitized by the orange Hypomyces lactifluorum. Var. acrior has a bluish green tinge in the gills near the stem and at the top of the stem, and often has a more intensely peppery taste. The variety may actually be synonymous with or a variety of Russula chloroides of Europe. Russula brevipes is the commonest of the larger Russulas in the Pacific Northwest. it is found in BC (Gamiet). Shaffer examined collections from WA, OR, ID, CA, NS, ON, CO, IN, MA, ME, MI, NH, NM, NY, TN, TX, VT, and WY, the type variety being represented by WA, OR, ID, CA, CO, MI, NH, NY, VT, and WY, and var. acrior by OR, ID, MA, MI, NM, and VT. Thiers gives both varieties for CA as well as var. megaspora Shaffer with spores 9.3-14.1 x 8-12 microns., CHEMICAL REACTIONS stem surface reactions FeSO4+, SV-, phenol+, (Shaffer), light salmon reaction to FeSO4 with cap flesh, deep grayish purple with bluish component reaction to SV with cap flesh, (Grund for var. acrior)
Cap: 8-20cm across, dimpled when young becoming broadly funnel-shaped, margin inrolled when young; "white to buffy white with yellow brown stains"; matte, even, cap skin not peeling, (Woo), 7.6-12.7cm across, convex, umbilicate, becoming centrally depressed or funnel-shaped; "white or whitish, often with yellowish or rusty yellow stains or patches in the center"; dry, bald or nearly so, (Peck), 9-20cm across, when young depressed on disc and with inrolled margin, expanding to broadly funnel-shaped; "white to buffy white, but soon stained with dull yellow or brown" and at times becoming brownish overall when old; dry, matte, minutely felted, at times radially rugulose [wrinkled], not striate, (Shaffer), 7-30cm across, "broadly convex with a depressed center and inrolled margin", becoming broadly vase-shaped when old; "white or whitish but often dirty and/or with yellowish to brown stains and discolorations"; "dry, unpolished, minutely woolly or felty", margin not striate, (Arora)
Flesh: hard, brittle; white, (Woo), whitish (Peck), thick, 0.7-2cm in disc, hard-brittle; white, often stained with brown around larva channels, (Shaffer), "thick, crisp, brittle"; white, not staining, (Arora)
Gills: crowded, abundant subgills, narrow; white, becoming stained yellow brown; "often beaded with drops of clear liquid when fresh", (Woo), adnate or decurrent (rarely slightly rounded at stem), close, thin; white becoming tinged with pale cinnamon or ferruginous when old or in drying, (Peck), decurrent, usually close (occasionally crowded), with abundant subgills of varying lengths, gills narrow, 0.3-0.9cm broad, thin, acute near margin, sometimes forked near stem; nearly white when young, becoming pale yellow, at times "pale olive-buff" [Ridgway(1) color] when old, becoming spotted-stained with cinnamon to clay color; interveined, (Shaffer), adnate to decurrent, close or crowded, thin, usually alternating long and short; white or creamy (but tinged blue-green in var. acrior), often brownish-stained when old, (Arora)
Stem: short, stout; white staining brown, (Woo), 2.5-5cm long, firm, solid; white; bald, (Peck), 3-8cm x 2.5-4cm, equal or narrowing slightly at base, straight, round in cross-section, solid or becoming hollowed by larvae; white, sometimes becoming stained with brown; unpolished, rugulose [wrinkled], (Shaffer), 2-7(10)cm x 2-5cm, equal or narrowing downward, hard and rigid, often quite short and stout; dull white or brownish-stained, sometimes with blue-green tinge at top (var. acrior); smooth, dry, (Arora)
Odor: slight, sometimes faintly disagreeable, (Shaffer)
Taste: mild or slightly peppery (Woo), mild or slightly and tardily peppery (Peck), mild to slightly peppery (Shaffer), mild or slowly peppery, (Arora)
Microscopic spores: spores 9-12 x 8-10 microns, ornamentation Patterson-Woo type C-3, (Woo), spores round, 10-12.5 microns broad, (Peck), spores 9-11 x 8.5-10 microns, warts 1.0-1.7 microns high, "with a continuous or broken reticulum of fine lines", (Hesler(5)), spores 8.0-10.6 x 6.7-8.6(9.8) microns excluding ornamentation, usually broadly elliptic, occasionally broadly ovate, broadly obovate, or nearly round, rarely round, ornamentation 0.7-1.7 microns high, of cylindric to conic, blunt-tipped to acute-tipped, "occasionally partially nonamyloid warts which may be almost completely isolated, but which on most spores are usually aligned or connected by fine to moderately heavy lines, the ornamentation then forming a broken to nearly complete reticulum"; basidia 4-spored, 49-67 x 8.6-13.3 microns, usually clavate, rarely fusiform; pleuropseudocystidia abundant, 43-94 x 6.7-13.3 microns, projecting to 27 microns beyond the basidioles, arising in the subhymenium or trama, clavate to fusiform, "sometimes capitate, submoniliform near the apex, or bearing a stub, otherwise rounded to subacute apically", "straight, curved, or flexuous basally", "filled partially to completely with granular to linear, refractive, yellowish contents", cheilopseudocystidia common to abundant, 33-81 x 6.0-12.0 microns, like the pleuropseudocystidia; cap cuticle 67-186 microns thick, lacking a gelatinous matrix, of interwoven to generally horizontally oriented, non-gelatinous, septate, branched, colorless to yellowish brown hyphae 1.3-6.7 microns wide which may give rise to scattered or tangled-clustered, ascendant to erect, undifferentiated hairs to 140 microns long, oleiferous hyphae absent to fairly common, (Shaffer), spores 8-11 x 6.5-9 microns, elliptic, with amyloid warts and ridges, (Arora)
Spore deposit: white to pale cream, Crawshay B, (Woo), white to light cream color, lighter than Crawshay B, even when colored, almost white in thin deposits, (Shaffer), white to pale buff (Arora)
Habitat / Range
coniferous woods (Woo), woods and open places, July to October, (Peck), single or more often scattered or in groups or troops on ground in woods, (Arora), summer, fall
Russula cascadensis is strongly and quickly peppery (whereas R. brevipes has a slowly developing peppery taste), and spores are smaller with slightly weaker ornamentation, (Thiers). R. cascadensis has a cap that is 4-9cm across and flesh is intensely peppery whereas R. brevipes var. brevipes has a cap that is 8-20cm across and flesh is mild to slightly peppery, (Woo). The spore deposit of R. cascadensis is darker than that of most R. brevipes, (Roberts, C.(2)). Var. acrior of R. brevipes may have a more intensely peppery taste than the type variety, thus being closer to R. cascadensis, but has a greenish band around stem and greenish gills. The European Russula delica Fr. is similar - Peck(1) separated R. brevipes because the cap of R. brevipes is unpolished and opaque, gills are close and change with age and in drying, and taste is slightly peppery. (There is considerable confusion about what should be referred to as R. delica: Shaffer in 1964 accepted R. delica only in the sense of Kuehner and Romagnesi as a species with thick distant gills lacking bluish green coloration and with spores having obtuse warts that are lower than those of R. brevipes; Singer in 1947 gave R. brevipes Peck as a synonym of R. delica Fr. sensu Bres.)
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:
2020-06-03 10:17:30 AM
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