Suillus umbonatus Dick & Snell Cap 3-6cm across, broadly convex with an acute umbo; olive tan, sometimes paler toward margin and darker on the umbo; slimy and sticky, streaked with rusty-brown gluten. Tubes adnate to subdecurrent, separating clearly; buff-colored. Pores subangular; pale yellow to greenish yellow, staining dirty pink when bruised. Stem 25-40 x 3-8mm, solid; pale yellow above the ring, whitish but streaked and blotched with brownish dots from below the ring to the base. Veil gelatinous becoming dirty pink; leaving a gelatinous ring. Flesh very soft; pale yellow, becoming tinged with pinkish buff when cut. Odor not distinctive. Taste slightly sour. Spores ellipsoid, 7-10 x 3-4.5µ. Deposit dull cinnamon. Habitat gregarious and sometimes growing in dense tufts among moss under pine. Often common. Found in the Rocky Mountains and Pacific Northwest. Season July-November. Probably edible but not recommended.