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

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The North American Species of Pholiota

We have found it in large clusters with small pilei, large clusters
with large pilei, small clusters with large pilei, and small pilei in small
clusters, and hence cannot assume that the amount of available food
material regularly determines the size of the basidiocarp as much, possibly, as it does the size of the cluster.
We have two collections from Cusick, Wash. Smith 73375 and 74152
(the latter collected by K. Harrison) which came up on dried mud in an
old logging road. The caps were 1-3 cm broad, at first covered by woodbrown scales but as these become separated the dingy yellow ground color
became evident and the older pilei are dingy yellowish as dried. Yellow
tints also show in the stipes of both collections. Pending further collections of this depauperate "form" we merely mention its existence here
and regard it as a dry weather variant.
MATERIAL EXAMINED: CALIFORNIA: Smith 3639, 3642, 8194, 56153;
Thiers 8806; IDAHO: Trueblood 540c (MICH); Slipp 41FP 1969; Smith
569, 44149, 54030, 54489, 54814, 58500, 70478; MICHIGAN: Smith 34098;
OREGON: Gruber 1946; La-1027 (MICH); Sipe 227, 232, 387; Smith
19347, 24677, 2852, 3604, 7861, 19359, 28120, 55354; WISCONSIN,
Harper. WASHINGTON: E. Schmidt 2; Smith 16958, 17035, 39849,
68799; CANADA (BRITISH COLUMBIA): Waugh (Myc. Herb. Sci.
Service 23958).
100a. Pholiota subcastanea sp. nov.
Illustrations: P1. 48.
Pilciis 5-10 cm latus, plano-umbonatus, viscidus, squamosus, subcastaneus, cartilagineus. Lamellae angustae, confertae, fulvo-cinnamomeae, demum mactlatae. Stipes 6-12 cm longus, 6-12 mm crassus, durus,
fibrosis, pallide argillaceus denum sutbcastaneo maculatus, squarrososquamnlosuts. Annulus laceratus, cinnamomeus. Sporae 5-6 x 3.5-4 1.
Pleurocystidia mucronata. Specimen typicum in Herb. Univ. Mich. conservaturn est; legit Sharon Hollow, Mich. 21, Sept. 1967, ad Juglans
cimerea; Smith 75074.
Pileus 5-10 cm broad, obtuse, expanding to plano-umbonate or
nearly so, surface viscid beneath a layer of squamules over disc, toward
margin the squamules more or less triangular and appressed, color of
scales dull reddish tawny to russet, ground color pallid becoming cinnamon buff. Context cartilaginous-pliant, pinkish buff to cinnamon buff,
with a watery brown line above the gills; odor slightly pungent, taste
not distinctive; FeSO4 instantly green.
Lamellae narrow, close, adnexed, seceding, reddish cinnamon when
mature and spotted russet where injured, edges even.
Stipe 6-12 cm long, 6-12 mm thick, equal to the slightly enlarged
fused base, in consistency very hard and fibrous, yellowish to pinkish
buff within but soon russet from the base upward, surface recurvedsquamulose with cinnamon buff to "Verona brown" very fine but con