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

Smith ~ Hesler

297

similar to pleurocystidia but smaller and more fusoid, the small ones
usually colorless. Caulocystidia none.
Gill trama of a central area of parallel to interwoven floccose hyphae
the cells long or short and with thin smooth ochraceous to nearly-hyaline
wall; subhymenium a narrow gelatinous band of hyaline gelatinous
hyphae curving out toward the hymenium, hyphae 2-3 /, diam. and with
thin smooth walls. Pileus cutis a thick gelatinous pellicle of pale ochraceous hyphae 2-5, diam. with distinctly gelatinizing walls; hypodermium
of floccose incrusted hyphae 4-10 (14) /u diam., orange-rusty to bright
ferruginous in KOH (paler in young material). Context hyphae thinwalled, inflated; walls smooth and greenish-yellow in KOH; large orangerusty oleiferous hyphae present. Clamp connections present, all hyphae
inamyloid.
HABIT, HABITAT, AND DISTRIBUTION: On or near conifers (pine, hemlock), Massachusetts, New York, North Carolina, Tennessee, Michigan
and Colorado. August-December.
OBSERVATIONS: As pointed out by Peck (1911), it is a species well
marked by its yellow veil, and yellow flesh of both the stipe and pileus,
and its strong odor. Kauffman (1926) considered it a segregate of P.
spumosa. He also compared it with P. condensa. The latter shows slightly
thickened cystidial walls and is not said to have an odor. The two should
be carefully compared, however, on the basis of fresh material. One of
the striking features in material revived in KOH is the orange-rusty
colored content in the neck of the pleurocystidia in conjunction with the
bright orange-rusty colored hypodermium. These features in addition to
the larger spores distinguish it at once from the common American form
of P. spumosa. However, it apparently is a rare species.
MATERIAL EXAMINED: COLORADO: Smith 68787; MASSACHUSETTS: Peck (type); MICHIGAN: Smith 33-762; NORTH CAROLINA:
Hesler 19650; TENNESSEE: Hesler 9586.
Stirps Scamba
The slender stipe and relatively wide spores along with the short
pleurocystidia of many species characterize the group. See P. subtestacea
also.
Key
1. Spore wall 0.5 /u (or slightly more) thick........ P. pulchella
1. Spore wall 0.25 F, thick approximately.......................... 2
2. Veil tawny as judged by flecks on pileus and zones on the stipe.................................................................................................... P. calvini
2. Veil not as above.................................. 3
3. Pileus chrom e yellow............................................................ P. tetonensis
3. Pileus not colored as above............................................................ 4