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

328

The North American Species of Pholiota

Key
1. Stipe 6-12(15) mm thick (see P. spinulifera also)......2
1. Stipe 3-6(8) mm thick...................................... 4
2. Veil with an outer gelatinous layer......... P. coloradensis
2. Veil dry and fibrillose................................................... 3
3. Veil remnants on pileus pallid tan to yellowish; spores ochraceous
taw ny in K O H............................................................ P. sublu brica
3. Veil remnants whitish; spores in KOH merely pale yellowish.......................................................... P. a r mn e n ia c a
4. Growing on soil; lamellae narrow...... P. su1bcarbonaria
4. Not with above combination of features..... 5
5. Some fibrils on the stipe brilliant orange P. fibrillosipes
5. Not as above.............................................. 6
6. Spores in KOH pale rusty cinnamon P. luteola
6. Spores merely yellowish in KOH... P. splin lifera
177. Pholiota coloradensis sp. nov.
Illustrations: Text figs. 393-394; 395.
Pilelus 5-6 cm latzus, rainpanrllatls, glaber, viscidus, ainr'antincIl.
("ochr)aceons-orange"), ad nar-ginein albofibrillosus. Context ts nalbi.s.
Lami tllae suIb(ldecurl-en fis, angls.tae pallid(e gr)ic-so-olivaceae deiiinun sitbfitlvac. Stipes 5-6 cm lon gus, 9-10 min cr-assits, solidus, albidIs, deorsu'1 m
dt(1nun1i sbfulbnslVls. Sporac 6-7.5 X 4-4.5 fi. Plcrurocystitdia 45-65 x 9-15 tL,
utriformia, tenm ituanicatits. Specimen typicunm in Herb. UniV. Mich.
conservat7lin est; legit prope 7'olla7nd, Colo. 12 Sept. 1920. C. H. Kaltffma111n.
Pileus 5-6 cm broad, campanulate-convex, obtuse when young,
broadly umbonate in age, glabrous, viscid, pale orange ("oclraceousorange") when fresh (all ochraceous as dried), in age at times spotted
from the gluten. Margin whitish from veil remnants disposed along it.
Context white to whitish, thick, scissile.
Lamellae adnexed becoming subdecurrent, rather narrow, close to
crowded, almost "dark olive-buff" then "Isabella-color" to "tawny-olive,"
edges entire, concolor.
Stipe 5-6 cm long, 9-10 mm thick, solid, persistently fibrous-stuffed,
white at first, very thinly peronate to the annular zone, concentrically
arranged shreds or patches of veil material lower down, becoming rusty
brown in base. Veil gelatinous outside-fibrillose to interior.
Spores 6-7.5 x 4-4.5 /, pale tawny in KOH and about the same in
Melzer's reagent, smooth, apical pore very minute, in face view elliptic
to ovate; in profile mostly obscurely inequilateral to subovate, apiculus
indistinct.
Basidia 18-23 x 5-6.5 /, 4-spored, clavate, yellowish in KOH and
Melzer's reagent. Pleurocystidia 45-65 x 9-15,u, subcylindric to utri