The North American species of Pholiota, by Alexander H. Smith and L. R. Hesler.

186

The North American Species of Pholiota

1. Spores smaller (6-8 x 4-4.5 /t)........................................ 2
2. Pleurocystidia 38-78 x 10-14............................ P. schraderi
2. Pleurocystidia smaller and at least some of them chrysocystidia..................................................................................................... P. s c a b e lla
93. Pholiota sola sp. nov.
Illustrations: Text figs. 186-188; pl. 40b.
Pilcus 2-3 cm latus, obtisus demum obtuse campanulnttus, vel siubplan us, fibrilloso-sqam uloslt.s; sqltam ulae luteo-brunneae; contextus subspadiceus. Lamellae decurrentes, confe-tac, latae, pallide subluteae demum subfuscae. Stipes 6-8 cm longus, 7-8 mm crassus, intus subolivaceus,
extlus pallide Ilteus, deorsum squamosus; squamae recurvatae. Sporae
8-10.5 x 4.5-5.5 P1l. Pleuro-pseudocystidia 3-9 tL latae. Cheilocystidia
35-56 X 6-8 x 2.5-3 pi fusoide-ventricosa et proliferata. Specimen typicum
in Herb. Univ. Mich. conservatum est; legit prope Tahquamenon Falls
State Park, 2 Aug. 1951. Smith 37424.
Pileus 2-3 cm broad, obtuse with an incurved margin, expanding
to obtusely umbonate, or nearly plane and the umbo obsolete, surface
appressed fibrillose-squamulose, the scales most distinct along the margin,
ground color between avellaneous and cinnamon buff, squamules and
fibrils "tawny-olive" to "cinnamon-brown." Context near "Saccardo's
umber" (dark yellow-brown), fading; taste and odor none.
Lamellae decurrent, close, moderately broad, "cream-buff" when
young, finally earth-brown from the spores.
Stipe 6-8 cm long, 7-8 mm thick, equal, tubular, dingy pale oliveyellowish inside, exterior near apex yellowish (paler than gills) yellow
less evident toward the base, covered to the apical annular zone witl
scattered tawny-olive squamules concolorous with pileus over all except
the apex.
Spores 8-10.5 x 4.5-5.5 u/, smooth, apical pore none, shape in face
view oblong to elliptic, some obscurely angular, in profile more or less
bean-shaped, in KOH tawny-cinnamon and about the same color in
Melzer's reagent.
Basidia 30-54 x 6-9 p, 4-spored, clavate, hyaline and homogeneous
in KOH or some with granular pale ochraceous content, in Melzer's
reagent a fair number with very dark yellow-brown to bister granularamorphous content causing them to stand out prominently in mounts in
Melzer's. Pleurocystidia present as crooked filaments with granular content, yellowish in KOH or in Melzer's with very dark yellow-brown
granular to amorphous content and often seen connected to oleiferous
hyphae with the same content, the cells 3-9 bA broad and length extremely
variable. Cheilocystidia versiform: 1) subcylindric to subfusoid, walls
often flexuous, 25-44 X 4-7 u; 2) ventricose at base and proliferated into
a narrow crooked neck, 35-56 x 6-8 x 2.5-3 /t; 3) fusoid-ventricose with
wavy neck and obtuse apex, 24-35 x 5-8 pu; some cystidia branched at