Name: Suillus quiescens
Author: T.D. Bruns & Vellinga
Citation: Bruns, Grubisha, Trappe, Kerekes & Vellinga, Mycologia 102(2): 442 (2010)
Extract from original description :
Pileus broad, hemispheric to broadly convex, moderate to large, 6–12 cm diam; color approaching strong brown (s. Br 55) or deep brown (deep Br 56) on mature pilei, sometimes with olivaceous patches or tones, much paler when young but still some shade of light Brown (l Br 57) or between light brown (57) and light orange (l.o. 52), or grayish yellow; covered in glutinous layer, but glutin often drying in strands to give a slightly fibrillose look to older specimens; margin in-rolled when young with a limited sterile zone of a millimeter or less. Pileus context white, generally unchanging, sometimes with brownish stains just under cuticle, and pale yellow tones just above tubes. Tubes when young pale yellow (near 89, p.Y.) and with light brown or yellowish brown glandular secretions; older tubes slightly lighter than brilliant orange yellow (67 Brill OY), becoming olivaceous yellow (near 84, s.Y.) Mature tube mouths radially elongate but generally less than 1 mm wide. Stipe usually short, typically 2–4 cm long, but sometimes longer (6–8 cm), even, or very slightly bulbous, or tapered to the base, pale yellow (p. Y 89) to light yellow (l. Y. 86) on apical fifth; lower part of stipe same color at apex or white or overlaid with a light brown (l.Br. 57) layer or streaks of glutin as on pileus, occasionally this overlay gives the impression of a annular zone (FIG. 2C⇑); stipe surface finely glandular; glands initially only slightly darker than stipe surface, but sometimes light brown, becoming nearly black after drying. Stipe context white and unchanging, but sometimes with orangish stains in older or insect-damaged parts. Spore deposit not determined, but probably between strong yellow brown (s.y Br 74) and strong brown (s Br 55) as seen on pileus surface of several specimens.
The cap ranges in shape from hemispheric to broadly convex, and has a diameter of 6 to 12 cm (2.4 to 4.7 in). The cap color is deep brown in mature specimens and lighter shades of brown when younger. Young specimen have a sticky layer of gluten on the cap that dries out in maturity. The edge of the cap is rolled inwards in young specimens. The flesh of the cap is whitish and does not change color when bruised or cut. The tubes on the underside of the cap are light yellow to bright orange-yellow; the tube mouths are usually less than 1 mm wide. The stem is usually between 2 and 4 cm (0.8 and 1.6 in) long, less frequently reaching up to 8 cm (3.1 in). It is either the same width throughout or slightly larger (bulbous) at the base. The color of the upper portion of the stem is pale to light yellow, while the lower portion may be light brown or covered with streaks of glutinous material like that on the cap. The stem surface is covered with fine glands that are initially slightly darker than the color of the stem surface, but deepen to brown or nearly black after drying. The color of the spore print was not determined from the initial collections, but is thought to be yellow-brown to brown based on the accumulated spore deposit seen on the surface of the caps of neighboring fruit bodies.
The spores are elongated, or oblong in face view, with dimensions of 6.1–14.7 by 2.4–3.7 µm. Most spores have a single large drop of oil in them. The spore-bearing cells, the basidia, are club-shaped, two- or four-spored, and measure 20.2–26.2 by 5.2–6.7 µm.
Created: 2008-01-21 09:47:34 CST (-0500) by Darvin DeShazer (darv)
Last modified: 2012-09-16 07:20:24 CDT (-0400) by Nathan Wilson (nathan)
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