Suillus bovinus, also known as the Cow mushroom, is a small, orange-rusty brown bolete, with a convex to flat cap and short, ringless stem. The mushroom occurs often in large groups beneath pine trees, often beside forest paths, in clearings and at the edges of woods.

Cap grey-yellow or ochre with a pink tinge, initially convex, then flat with a wavy margin. The flesh is spongy and rubbery, whitish, yellowish or clay-coloured and has a fruity smell. Pores at first pallid olive or buff, becoming more ochraceous with age, angular, compound, unequal, and large. The tubes are sometimes slightly decurrent to the stem. Stem pallid yellowish sienna, more or less equal or tapering at the base. Unlike many members of the Suillus genus, it does not have a stem ring. Spore print olive-green or brown.

Microscopic Features: The spores are smooth and subfusiform, measuring 8-10μm in length and 3-4μm in width.

Suillus bovinus on the www.first-nature.com web site.