Suillus albivelatus A.H. Sm., Thiers, and O.K. Mill.
northern pine bolete
Suillaceae
Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.
Introduction to the Macrofungi
northern pine bolete
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 viscid to glutinous cap that is orange-brown, becoming vinaceous brown or brownish red to yellow-brown when old, 2) a cap margin with scattered white scales or hanging veil remnants, 3) white flesh that may stain vinaceous, 4) round pores that are buff to yellow or orange buff, 5) dry stem that is yellowish to buff at the top and white in the lower part, the stem sometimes having a few glandular dots, and often having a fleeting ragged annular zone, and 6) growth under conifers especially pine. The holotype of Suillus albivelatus is albivelatus is one substitution and 1 indel different in the ITS region than one of Smith''s original 1964 collections of S. pseudobrevipes, so it may be that they are not separate species (D. Miller, pers. comm.).
Chemical Reactions:
KOH on flesh gives pink then lilac-drab reaction, on cap cuticle no reaction, FeSO4 no reaction, (Smith)
Odor:
not distinctive (Bessette(3))
Taste:
not distinctive (Bessette(3))
Microscopic:
spores 7-8.5 x 2.5-3 microns, elliptic, smooth, yellowish, (Bessette(3)), 7-8.5 x 2.8-3 microns, oblong, smooth, yellowish in KOH, only slightly more yellowish brown in Melzer''s reagent; basidia 4-spored, many with red content; pleurocystidia in clusters, 38-50 x 8-12 microns individually, subfusoid, clavate or cylindric, content and area surrounding cluster vinaceous-red in KOH; cap epicutis of hyphae 4-9 microns wide, "appressed on cap surface (possibly a collapsed trichodermium), gelatinous as revived in KOH and with numerous minute granules in the gelatinous matrix, the granules +/- yellowish in KOH and in Melzer''s sol."; caulocystidia in clusters or scattered and similar to pleurocystidia; clamp connections none, (Smith), clamp connections present on all tissues (Bessette(1))
Spore Deposit:
cinnamon-brown to buff (Bessette(3)), near cinnamon-buff after moisture has escaped (Smith)
Notes:
Suillus albivelatus is found in the Pacific Northwest and the northern Rocky Mountains, south to ID and northwestern MT, (Bessette). There is a WA collection at the University of Washington. It has also been reported from BC (M. Beug, pers. comm.) and AB (Schalkwijk-Barendsen).
EDIBILITY
yes (Bessette(3))
Habitat and Range
SIMILAR SPECIES
Suillus pseudobrevipes has a veil that sheaths the stem, the cut flesh does not show vinaceous lilac or vinaceous pink tone, and the pleurocystidia are rusty brown in KOH rather than vinaceous-red, (Smith). Suillus brevipes lacks a partial veil (Bessette(1)). Suillus glandulosipes does not have a complete outer veil at any stage, and does not have vinaceous colors in the stem except when old.Habitat
single, scattered, or in groups on ground under conifers, especially ponderosa pine and other pines, June to August, (Bessette(3)), late summer and early fall (Miller)
Status Information
Synonyms
Synonyms and Alternate Names:
Boletopsis subsquamosa (L.) Kotl. & Pouzar sensu Gilbertson