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

Smith * Hesler 205
differentiation as to color or structure. Context hyphae hyaline, interwoven, the cells inflated and with thin smooth walls. Clamp connections
present but rare and difficult to demonstrate. All hyphae inamyloid.
HABIT, HABITAT, AND DISTRIBUTION: Caespitose on soil, at the base of a
sugar maple, New York, September. Type studied.
OBSERVATIONS: In this species we again have a "stage" in the development of the typical chrysocystidium in that the content of the cell
is not organized (as revived in KOH) into a sharply delimeted refractive
inclusion but involves in most cells the shrunken coagulated total cell
content. The spores and gelatinous subhymenium clearly remove the
species from Hebeloma where it was described, and, along with the veil
features, indicate Pholiota as the correct genus. It is very doubtful if the
color of the spore deposit is purplish, but on this point we have no data.
Under the microscope the color of the spores is more ochraceous than
usual for a Pholiota, indicating that yellow tints probably would be
prominent in a deposit.
MATERIAL EXAMINED: NEW YORK: Murrill (type, of Hebeloma
appendiculatum on lawn, New York Botanical Garden, September 4,
1912).
Stirps Adiposa
The species with a gelatinous pellicle or subcutis and a gelatinous
subhymenium are placed here but the gelatinous cutis is not obscured
at first by a dense layer of squamules as in the previous stirps; however,
the two intergrade.
Key
1. Spores 5-6 (8) w ide......................................................... 2
1. Spores mostly 2.5-5 tu wide........................... 3
2. Spores 6-8,t wide.............................. P. aurivelloides
2. Spores 4.5-6 /x wide.............................. P. aurivella
3. Spores 4-6 X 2.5-3.5........................... 4
3. Spores (5) 6-8 (9) It long.......................... 5
4. Pileus gills and stipe picric yellow; stipe with well-defined dry
picric yellow recurved squamules.................... P. flammans
4. Pileus darker (ochre yellow); scales on stipe gelatinous....................................................................................................... P. a d ip o s a
5. Taste bitter; some context hyphae with inclusions resembling those
of chrysocystidia........................................P. lucifera
5. Taste mild to fungoid or somewhat unpleasant; hyphae not as above.................................................................................................................... 6
6. Stipe connate and pointed below; with a thin viscid layer over
low er part of stipe........................................................... P. connata
6. Stipe not as above........................................ 7