Name: Hygrophorus albicastaneus (Murrill) Hesler & A.H. Sm.
Most Confident Observations:
Version: 2
Previous Version 

First person to use this name on MO: Nathan Wilson
Editors: walt sturgeon


Rank: Species

Status: Accepted

Name: Hygrophorus albicastaneus

ICN Identifier: missing

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Author: (Murrill) Hesler & A.H. Sm.

Citation: North American Species of Hygrophorus: 327 (1963)

Brief Description: [See More | Edit]

Pileus 3-7 cm broad, hemispheric to broadly convex, at length slightly depressed in the center, glabrous, viscid when moist, white, becoming yellowish and finally dull rusty brown on drying. Context fleshy, thick (10 mm), white, compact, firm.
Lamellae white, becoming yellowish and on drying dingy brown to dark reddish brown (as in H. variicolor), adnate but finally de- current, narrow (3-5 mm), subdistant, attenuated at both ends finally, 1-2 tiers of lamellulae. Stipe 4-8.5 cm long, 12-14 mm thick (or as thin as 4-7 mm) solid to stuffed, tapered toward the base, often flexuous “perhaps subviscid” (Rea), white, apex dotted with white dots or squamules, appressed
fibrillose and nearly glabrous below. Spores 7-9.5 X 4-5.5 ft, ellipsoid, smooth, hyaline, non-amyloid. Basidia 4-spored, 34-42 X 6-8 ft, hyaline in KOH. Pleurocystidia and cheilocystidia none. Gill trama of divergent hyphae (but in revived material the picture is often obscured by incomplete reviving of the hyphae). Pileus epicutis of hyaline gelatinous narrow hyphae more or less interwoven. Clamp connections present.
HABIT, HABITAT, AND DISTRIBUTION-Sainta Ynez Valley near Para- dise Camp, Santa Barbara County, Calif. On the ground in oak woods, Feb. 9, 1940, Paul Marshall Rea H361. The type was growing under oak near Searsville Lake, Calif., Dec. 28, 1902, McMurphy 61.
OBSERVATIONs-We were at first inclined to the opinion that Clitocybe albicastanea Murr. was the same as H. chrysaspis, partly be- cause Murrill reduced his species to synonymy under H. eburneus. However, there is no indication from anyone that C. albicastanea ever had a glutinous veil, and Rea’s notes support McMurphy’s observations indicating none was present. Rea’s description of the stipe as “perhaps subviscid” can mean only one thing, that the stipe was soft and slightly tacky to the touch, as is the cap of Inocybe geophylla when it is wet. Hence, it is legitimate to regard H. albicastaneus as belonging in section Clitocyboides where it is closely related to
H. variicolor, but distinct because it is white at first.

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