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

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The North American Species of Pholiota

MATERIAL EXAMINED: CALIFORNIA: White 551. IDAHO: Smith
59660 (type), 60741, 60742, 65989, 70146, 70887. OREGON: Smith 19458,
55877. WASHINGTON: Smith 3362.
Subgenus Pholiota
In keeping with the features of the type of the genus, the group is
defined as containing species with both pileus and stipe distinctly scaly.
It serves as a connecting link from species with no gelatinous layers in
the subhymenium or pileus cuticle to those with a gelatinous subhymenium and slimy pileus surface. Obviously closely related species in
which one or both of these features are somewhat reduced are also placed
here. Chrysocystidia or very similar sterile cells are found in the hymenium of many of the species.
TYPE SPECIES: Pholiota squarrosa.
Section Pholiota
Key to Stirpes
1. Spores 7-10(11) x 4.5-5.5,u, very dark brown in KOH (Agaricuslike), and with a prominent apiculus................ Stirps Fulvosquamosa
1. Spores not as above.................................. 2
2. Pileus and subhymenium both lacking any gelatinized layers; subhymenium more or less cellular.............. Stirps Schraderi
2. N ot as above................................. 3
3. Pileus cuticle lacking a gelatinous layer; subhymenium gelatinous..................................................... Stirps Squarrosa
3. Pileus with a gelatinous subcutis or pellicle...................................... 4
4. Pileus with a gelatinous subcutis often obscured until near maturity by dry fibrillose-scaly epicutis......... Stirps Squarrosoides
4. Pileus with a gelatinous cutis which is obvious at an early stage............................................S tirps A diposa
Stirps Fulvosquamosa
It is questionable whether the central species actually belongs in
Pholiota since the spores are typical of Agaricus, but we do not have data
on fresh material. Stropharia kauffmanii appears to be the most closely
related species, but it is not typical of Stropharia in many respects in
spite of the color of the spore deposit.
92. Pholiota fulvosquamosa Peck, Bull. Torrey Club 30: 95. 1903.
Hypodendrum fulvosquamosum (Pk.) Overholts, North Amer. Fl. 10;
281. 1932.