|Major Groups > Gilled Mushrooms > Pale-Spored > Lactarius > Lactarius rubriviridis|
by Michael Kuo
This mushroom, believe it or not, belongs in the genus Lactarius, despite the fact that it is an underground, truffle-like lump that lacks a cap, stem, or gills. However, it does exude "latex" like a "normal" Lactarius, and it stains green like the species in the Lactarius deliciosus group--to which it actually belongs, according to DNA results. And, under the microscope, its spores are decidedly Lactarius-like.
Lactarius rubriviridis is apparently a rare species, known only from northern California and central Oregon. It is associated with conifers.
Ecology: Mycorrhizal with conifers; summer and fall; northern California and central Oregon.
Fruiting Body: 2-6 cm; egg-shaped, ellipsoid, or nearly round; outer surface pitted and ridged, reddish brown, bruising and discoloring greenish to green; interior chambered and pocketed, with white flesh that stains red when sliced; usually with a central column-like structure (the illustrated collection is apparently aberrant, with its large central fleshy area).
Milk: Scant; red.
Odor and Taste: Odor sweet or not distinctive; taste mild.
Spore Print: Creamy or orangish.
Microscopic Features: Spores 8.5-11 x 7.5-8.5 µ; broadly ellipsoid; ornamentation with prominences 0.5-1 µ high; connecting lines forming well developed reticula.
Thanks to Laurence Boomer for collecting, documenting, and preserving the illustrated and described specimens.
Further Online Information:
Lactarius rubriviridis at Russulales News
Cite this page as:
Kuo, M. (2009, December). Lactarius rubriviridis. Retrieved from the MushroomExpert.Com Web site: http://www.mushroomexpert.com/lactarius_rubriviridis.html