Major Groups > Gilled Mushrooms > Pale-Spored > Lactarius > Lactarius subplinthogalus

MushroomExpert.Com

Lactarius subplinthogalus

[ Agaricomycetes > Russulales > Russulaceae > Lactarius . . . ]

by Michael Kuo

This Lactarius is found east of the Rocky Mountains, and is especially common under oaks in the southeastern United States. It is easy enough to identify: the cap is usually a pale shade of yellowish brown, and its margin is often scalloped or pleated at maturity; the gills are very distant; and the milk, which is white when exuded, dries pink and stains the gills and flesh pink.

Description:

Ecology: Mycorrhizal with oaks and, perhaps, with other hardwoods; growing alone, scattered, or gregariously; summer and fall; widely distributed east of the Rocky Mountains, but especially common in the southeastern United States and in Mexico.

Cap: 3-10 cm; flat, with a central depression, or shallowly vase-shaped; the margin usually becoming scalloped or pleated by maturity, at least shallowly; smooth or somewhat wrinkled, especially in age; bald or very finely velvety; whitish to yellowish buff, eventually darkening to light brown or grayish brown.

Gills: Beginning to run down the stem; very distant (about 1-3 mm apart at the margin); yellowish; stained salmon pink (sometimes slowly) by the milk.

Stem: 3-8 cm long; 0.5-1.5 cm thick; equal or tapered to base; smooth; colored like the cap or paler; dry; hollowing.

Flesh: Soft; whitish; staining salmon pink when sliced.

Milk: White; drying pink; staining tissue pink.

Odor and Taste: Odor not distinctive; taste acrid (or sometimes mild, especially in older specimens).

Spore Print: Creamy or buff.

Chemical Reactions: KOH negative on cap surface.

Microscopic Features: Spores 7-9.5 x 7-8 µ; subglobose; ornamentation 1.5-2.5 µ high, as amyloid spines and wide, branched ridges that do not generally form reticula. Pleuromacrocystidia absent. Cheilocystidia subcylindric; to about 35 x 5 µ. Pileipellis a trichoepithelium or trichopalisade, with terminal cells cylindric to subclavate.

REFERENCES: Coker, 1918. (Coker, 1918; Hesler & Smith, 1979; Smith, Smith & Weber, 1979; Weber & Smith, 1985; Montoya et al., 1990; Phillips, 1991/2005; Roody, 2003; Binion et al., 2008.) Herb. Kuo 08240204, 06270301, 07280305, 08040304, 07280404, 07070709, 07160804.

Further Online Information:

Lactarius subplinthogalus in Hesler & Smith (1979)
Lactarius subplinthogalus at Roger's Mushrooms
Lactarius subplinthogalus at Russulales News

 

Lactarius subplinthogalus

Lactarius subplinthogalus

Lactarius subplinthogalus

Lactarius subplinthogalus

Lactarius subplinthogalus

Lactarius subplinthogalus
Spores

Lactarius subplinthogalus
Cheilocystidia

Lactarius subplinthogalus
Pileipellis



© MushroomExpert.Com




Cite this page as:

Kuo, M. (2011, March). Lactarius subplinthogalus. Retrieved from the MushroomExpert.Com Web site: http://www.mushroomexpert.com/lactarius_subplinthogalus.html