|Major Groups > Gilled Mushrooms > Pale-Spored > Laccaria > Laccaria pumila|
by Michael Kuo
Laccaria pumila is a tiny species of Laccaria found under various high-elevation willows, birches, and conifers in western North America. It has a small, orangish brown cap that is often strongly lined, and a tiny stem with white basal mycelium. Several species look virtually identical to the naked eye, and a few of these (Laccaria montana and Laccaria pseudomontana) inhabit the same ecosystems--but Laccaria pumila is easily separated from look-alikes with microscopic analysis, since it is the only species in the group with 2-spored basidia.
Ecology: Mycorrhizal with willows, birches, and conifers; appearing in arctic, boreal, and montane ecosystems; growing scattered or gregariously, often in moss; summer and fall; western and northern North America.
Cap: 3-30 mm; convex, becoming flat and sometimes depressed; the margin often inrolled; usually strongly lined; bald or finely hairy to finely scaly; orangish brown.
Gills: Attached to the stem; distant; pinkish flesh colored.
Stem: 4-60 mm long; up to about 5 mm thick; more or less equal; bald; often longitudinally lined; colored like the cap; with whitish basal mycelium.
Flesh: Insubstantial; orangish brown.
Odor and Taste: Not distinctive.
Spore Print: White.
Microscopic Features: Spores 11-17 x 10-15 µ; elliptical or subglobose; spines 0.5-1.5 µ long; inamyloid. Basidia 2-spored. Cheilocystidia absent. Pileipellis a cutis of elements 5-10 µ wide, with scattered bundles of upright elements; terminal cells subclavate.
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Cite this page as:
Kuo, M. (2010, December). Laccaria pumila. Retrieved from the MushroomExpert.Com Web site: http://www.mushroomexpert.com/laccaria_pumila.html