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

Summary:
Features include 1) a fibrillose or fibrillose-scaly cap that is rose red to pink, 2) pale yellow flesh that is unchanging or turns slightly blue when cut, 3) large radially arranged pores that are yellow to ocher and do not turn blue, 4) a membranous veil adhering to the cap margin when young, and 5) growth under larch.

Suillus ochraceoroseus is found in the northern Rocky Mountains and the Pacific Northwest (Bessette), WA, OR, and ID, (Lincoff), and BC (Schalkwijk-Barendsen).

Cap:
8-20cm, convex becoming broadly convex to nearly flat, margin incurved at first, becoming downcurved and sometimes uplifted when old; covered with pink to rosy red or dark red to dull red fibrils and scales, usually overlaid with buff fibrils when young, often bright yellow along margin; dry, margin appendiculate with hanging veil remnants, (Bessette), 8-15(25)cm, convex to broadly convex and somewhat umbonate, becoming flat or nearly so, or margin slightly uplifted; color variable, often lemon yellow along margin and pinkish beneath scales on disc, at times rose pink to brick-red with little or no yellow, or at times whitish from dense fibrils; dry, often uneven or pitted, fibrillose to fibrillose-squamulose, the scales sometimes erect over disc but usually appressed toward margin; margin usually with hanging veil remnants when young, (Smith)

Flesh:
pale yellow, unchanging or turning slightly blue when cut, (Bessette), thick, soft; yellow, unchanging when bruised or a very slight change to bluish or greenish blue, (Smith)

Pores:
angular to elongated, boletinoid to sublamellate [somewhat gill-like], yellow to ocher, becoming olive-ocher to brownish; tube layer 0.3-0.6cm thick, (Bessette), about 2-5mm x 1-2mm, elongated to mostly angular, radially arranged to somewhat gill-like, compound; tube layer about 0.5cm thick, adnate to decurrent, bright straw-yellow to dull olive-ocher and finally dingy brown, (Smith), not bruising blue (Arora)

Stem:
3-6cm x 1-2.5cm, nearly equal or enlarged at either end, solid; yellow, often with reddish or brownish stains toward base; dry, partial veil submembranous (somewhat membranous), grayish to yellowish, often adhering to cap margin, sometimes leaving a ring, reticulate above the ring, (Bessette), 3-5 x 1-3cm, nearly equal, the base often somewhat bulbous and top frequently flared; nearly colored as tubes, "more sordid and often reddish at base or at times brownish"; unpolished or fibrillose below annulus, usually reticulate in upper part from decurrent tubes; veil thin and submembranous [somewhat membranous], pallid to yellowish, sometimes forming fleeting annulus but usually adhering to cap margin, (Smith), base often whitish and fibrillose (Arora)

Odor:
somewhat acidic to unpleasant (Bessette), acidulous (Smith)

Taste:
slightly acrid [peppery] to bitter (Bessette), very slightly peppery, bitterish in cooked material, (Smith)

Microscopic:
spores 7-10 x 2.5-3.5 microns, subcylindric [nearly cylindric], smooth, yellowish, (Bessette), spores 7.5-9.5 x 2.5-3.2 microns, nearly cylindric, smooth, a few dextrinoid, nearly colorless to yellowish in KOH; basidia 4-spored, 28-34 x 4.5-5.5 microns, narrowly clavate to subcylindric; pleurocystidia scattered to abundant, 46-58 x 6-8 microns, subcylindric to subventricose, obtuse to abruptly acute, colorless in KOH, thin-walled, often flexuous [wavy], cheilocystidia similar to pleurocystidia (35-40 microns long) and at times in clusters; cap cuticle of compactly interwoven hyphae; clamp connections absent, (Smith)

Spore Deposit:
dark reddish brown to purplish brown, (Bessette), dark vinaceous brown (Smith)