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

Smith - Hesler

267

Key
1. Stipe 10-20 mm thick........................................ 2
1. Stipe thinner, usually 3-8 mm diam............................ 3
2. Pileus glabrous and glutinous.......... P. abruptibulba
2. Pileus soon with spotlike or appressed squamules from the breaking up of the cuticle................................................ P. verna
3. Pileus at maturity rivulose............... P. rivulosa
3. P ileus no t as above............................................................................. 4
4. Pileus evenly dull cinnamon; typically on hardwood -Alnus and
A c e r............................................................................... P. o c c id e n ta lis
4. Pileus paler on margin; on conifer debris........................ 5
5. Spores 7-9 x 4-5................................................... see stirp s C on densa
5. Spores smaller.......6..................
6. Pleurocystidia with walls up to 0.5 p. thick.... P. fulvodisca
6. Pleurocystidia with walls about 2 / thick....... P. subflllva
142. Pholiota abruptibulba sp. nov.
Illulstrations: Text figs. 302-306.
Pilet.s (-1)7-9 cmn lat.s, (dernur late convexius, ghltinosus, fulvus. ContcxtiIs pallide lutc(us. Lame7llae subdecurrentes, pallide liuteae, confertae,
latac. Stipes 5-9 cm longus, 10-18 mm crassus, solidus demum. cavus,
tactnt subfldlvus, abrllptibulbus. Sporae 5.5-7.5 x 3.5-4 J.. Pleurocy.stidia
50-92 x 10-18 Ft. Caulocystidia voluminosa. Specimen typicum in Herb.
Univ. Mich. conservatum est; legit prope Larch Mt. Oregon, 30 Oct.
1947. mrn. B. Griubec (Smith 28421).
Pileus (4) 7-9 cm broad, convex with an inrolled margin, becoming
broadly expanded with a decurved margin, disc "ochraceous-tawny," or
a little darker, "pinkish-buff" on the margin, very glutinous, glabrous
except for scattered remains of veil near margin. Context pallid yellowish,
tliick; odor and taste not distinctive. (Color of flesh after standing becoming near pinkish buff or paler).
Lamellae broadly adnate-subdecurrent, in age short-decurrent, pale
yellowish, (near "cartridge-buff"), gradually paler and dull brownish,
close to only moderately close, broad, edges soon eroded.
Stipe 5-9 cm long, 10-18 mm thick, equal, solid, becoming hollow,
base with a small abrupt bulb, surface whitish or pale yellowish, stained
a sordid pale-tawny where handled, slightly fibrillose from a thin, pallid
veil.
Spores 5.5-7 (7.5) x 3.5-4 /L, smooth, with a minute pore (under a
1.4 NA obj., in face view oblong to narrowly elliptic, in profile slightly
bean-shaped to nearly oblong, pale cinnamon in KOH, paler and more
ochraceous in Melzer's reagent.
Basidia small, 15-20 x 5-6 /u, 4-spored, narrowly clavate, hyaline to
yellowish in KOH and Melzer's reagent. Pleurocystidia 50-92 x 10-18.u,