Sydowia 37: 300. 1984.
Photo: MGW71 (June 1985—Sonoma Co.) vouchered at SFSU
Common Name: none
Synonym: Gastrolactarius desjardinii (Thiers) J.M. Vidal
Basidiocarps secotioid, with a stipe and percurrent columella; colored dark brown, olive brown, greyish brown, greyish orange to yellowish white; 3-5 cm broad. Latex white, copious, and unchanging; staining gleba brownish, pinkish, or reddish on drying. Gleba exposed, irregularly laminate to chambered, anastomosing and contorted; pale yellow to buff. Odor none to mild. Taste mild to slightly mealy or bitter.
Stipe 2-4.5 cm long, 1-2 cm broad; colored like the pileus or paler; context whitish.
Spores 7.5-10.5 µm X 6.5-9.5 µm, globose to subglobse, ornamentation an amyloid complete or broken reticulum.
Arcangeliella desjardinii can be differentiated from the only other Arcangeliella known to grow in coastal California, Arcangeliella variegata, by the pinkish staining of the gleba by the latex and its lack of an acrid taste.
Desjardin, D.E., Wood, M.G. & Stevens, F.A. (2015). California Mushrooms: The Comprehensive Identification Guide. Timber Press: Portland, OR. 560 p.
Thiers, H.D. (1984). The Genus Arcangeliella Cav. in the Western United States. Sydowia 37: 296-308. (Protologue)