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Nomenclature

Lactifluus corrugis (Peck) Kuntze
Revis. gen. pl. 2: 856. 1891.

Lactarius corrugis Peck
Rep. (Annual) New York State Mus. Nat. Hist. 32: 31. 1880.

Taxonomic synonyms:

= Lactarius volemus var. subrugosus Peck, Rep. (Annual) Trustees State Mus. Nat. Hist., New York 38: 130. 1885.

Original diagnosis

Pileus fleshy, compact, firm, convex, then expanded or centrally depressed, merulioid or corrugated with gyrose-reticulate wrinkles, dark reddish-brown or chestnut-colored, becoming paler with age, suffused as if with a slight pruinosity; lamellae close, dark creamy-yellow or sub-cinnamon, becoming paler, often distilling drops of moisture, sordid or brownish where bruised; stem equal, solid, firm, paler then the pileus, sub-pruinose; spores large, subglobose, .00045-0.0005 in diameter, intermixed with small acicular points or spicules, . 0016-.002' long; flesh whitish or cream-colored, milk copious, white, mild.
Plant 4'-6' high, pileus 3'-5' broad, stem 6"-12" thick.
Ground in woods. Sandlake, Gansevoort and Brewerton. August and September.
This remarkable species is related to L. volemus. It is, however, of a darker color, and the surface of the pileus is very uneven from the presence of rugae or folds, which present an appearance much like that of the hymenium of species of Merulius. The spicules of the lamellae are a peculiar feature. They are so numerous that under a lens they give pubescent appearance to the edge of the lamellae.

Typification

Holotypus: Peck (NYS)
North America: United States: Sand Lake and Ganesvoort, New York

Published type studies: Montoya et al., Mycotaxon 57: 441-442 (1996)

Description

Photographs

Microscopy

SEM photos