Suillus pseudobrevipes A.H. Sm. and Thiers
pine slipperycap
Suillaceae
Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.
Introduction to the Macrofungi
pine slipperycap
Suillaceae
Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.
Introduction to the Macrofungi
Species Information
Summary:
Features include 1) a yellow-brown to red-brown, glutinous cap that often has hanging veil remnants and sometimes scattered patches near the cap margin, 2) white to yellow flesh that becomes pinkish around larval tunnels, 3) small, round, ocher-yellow unchanging pores, 4) a white to yellow stem that is often short and has obscure glandular dots and usually a fibrillose annulus.
Chemical Reactions:
flesh slowly stains olive with application of FeSO4 (Bessette)
Odor:
not distinctive (Bessette, Smith)
Taste:
slightly acidic or not distinctive (Bessette), mild to slightly acidulous, (Smith)
Microscopic:
spores 7-9 x 2.5-3 microns, oblong, smooth, pale ochraceous, (Bessette), spores 7-9 x 2.5-3 microns, oblong, smooth, pale ochraceous in KOH, slightly darker in Melzer''s reagent, wall slightly thickened but less than 0.5 microns; basidia 4-spored, 14-18 x 5.5-7 microns, short-clavate, colorless in KOH; pleurocystidia projecting slightly from hymenium, 20-30 x 9-10 microns, short-clavate, "in fascicles and these surrounded by copious rusty brown amorphous pigment", "individual cystidia with ochraceous to rusty brown content as revived in KOH", cheilocystidia 20-30 x 5-7 microns, subcylindric to subfusoid, content ochraceous to rusty brown; cap epicutis a gelatinous trichodermium of hyphae (3)4-12 microns wide, "mostly unbranched, becoming decumbent on cap surface", greenish-transparent in KOH and with scattered colorless granules in the interior; caulocystidia resembling cheilocystidia in size, shape and color, "rare, a few in a fascicle and fascicles rare to scattered, visible in the caulohymenium because of the brown amorphous pigment deposits"; clamp connections absent, (Smith), spores 7-9 x 2.5-4 microns, spindle-shaped to elliptic, (Arora)
Spore Deposit:
cinnamon-buff (Bessette), near "cinnamon buff" (Ridgway color), (Smith)
Notes:
Suillus pseudobrevipes is found at least in ID and WY, (Smith). RANGE includes the Rocky Mountains, the southwestern US, and CA, (Bessette). There are collections at the University of Washington from WA, OR, MT, and WY, and at the University of British Columbia from BC. There is some DNA support for the occurrence of this species in BC (D. Miller, pers. comm.)
EDIBILITY
unknown (Bessette), edible (Arora)
Habitat and Range
SIMILAR SPECIES
Suillus brevipes lacks a partial veil and annulus (Bessette). S. brevipes is similar in having a short stem but lacks a partial veil and has a darker cap, (Arora). S. brevipes is less distinctly streaked, (McKnight). Suillus brunnescens has a partial veil but not an annulus, and it has a white cap when young that becomes yellow-brown to lilac-brown when mature and stains vinaceous, then brownish when bruised, (Bessette). Suillus luteus has conspicuous glandular dots, and has narrower hyphae in the gelatinous cap trichoderm, (Smith). Sometimes the veil of S. pseudobrevipes persists as a roll of cottony tissue on the cap margin and does not form a distinct annulus, leading to confusion with such species as Suillus brunnescens and S. glandulosipes, (Arora). See also SIMILAR section of Suillus albivelatus.Habitat
single, scattered, or in groups on ground under pine, (Bessette), gregarious to scattered under Lodgepole Pine (Pinus contorta), (Smith), scattered to gregarious under pines, mainly Lodgepole and Ponderosa Pine, (Arora)
Status Information
Synonyms
Synonyms and Alternate Names:
Suillus himalayensis B. Verma & M.S. Reddy
Suillus sibiricus (Singer) Singer