The veiled species of Hebeloma in the western United States / Alexander H. Smith, Vera Stucky Evenson, and Duane H. Mitchel.

The Subgenus Hebeloma

85

connections not observed (but the material was unsuitable for an accurate study).
Habit, habitat, and distribution.-On soil, under oaks, near Stanford University, California, collected by James McMurphy, January
11, 1912, Murrill 126 (type, NY).
Observations.-The failure to find clamp connections could easily
be due to the condition of the material and so the feature is not
emphasized here. The sharp odor, thick stipe, and distinctly roughened
spores under the light microscope are distinctive. The species appears
to be related to H. fastible, but further studies from ample material of
both are needed to characterize them properly.
37. Hebeloma kanousiae sp. nov.
Pileus 2-4 cm latus, albus vel lacteus, leviter viscidus, glaber.
Contextus albus, odor et gustus mitis. Lamellae albidae demum "Clay
Color," angustae, confertae. Stipes 3-5 cm longus, 4-7 mm crassus,
albissimus, squamas albas floccoso-farinaceas gerens, siccus. Sporae
12-15 x 6-8 Im, sublimoniformes, non dextrinoideae. Cheilocystidia
30-60 x 5-8 [tm, cylindrica, ad basin ~ ventricosa.
Specimen typicum in Herb. Univ. Mich. conservatum est; legit
prope Medicine Bow Mts., Wyoming, 28 Aug 1923; B. B. Kanouse.
Pileus 2-4 cm broad, convex, margin at first incurved, expanding to nearly plane or remaining broadly convex, often somewhat
irregular in age, surface glabrous, not shining (merely subviscid),
margin at first "pulverulent flocculose-appressed" (Kauffman), color
white to milk white or cream color overall; odor and taste slight (not
distinctive).
Lamellae narrow, adnate or arcuate-subdecurrent, close, thin,
whitish becoming "Light Pinkish Cinnamon" and finally "Clay Color,"
edges beautifully serrulate when young, white fimbriate to somewhat
eroded in age.
Stipe 3-5 cm long, 4-7 mm thick, at first stuffed by a white pith
then hollowed, equal, scarcely bulbous at the base, shining white,
"covered throughout by floccose-mealy scales" (Kauffman), surface
beneath the scales soft and fibrous.
Spores 12-15 x 6-8 FIm, distinctly roughened, pale clay color in
KOH; shape in profile inequilateral, in face view ovate and the apex
tending to be snoutlike, merely ochraceous in Melzer's (not dextrinoid).
Hymenium.-Basidia 34-40 x 7-8 Jm, 4-spored. Pleurocystidia
none. Cheilocystidia 35-60 x 5-8 fim, filamentous to elongateclavate, hyaline, smooth, thin-walled.