The North American Species of Pholiota

15. Pholiota cinchonensis Murrill, Mycologia 5: 33. 1913.

Pileus 1.5 cm broad, becoming plane, ochroleucous to ochraceous, dry, granular-tomentose, striate, margin straight. Lamellae adnate, with a decurrent tooth, isabelline, narrow (1-2 mm broad).

Stipe 1.5 cm long, 1 mm thick, paler than the pileus, glabrous or nearly so, sometimes with fibrils on the lower part, base attached to a white mat of mycelium, equal. Veil forming a white, nearly central, sometimes ample annulus.

Spores 6-8 x 4.5-5.5 µ, in face view elliptic, in profile slightly inequilateral, smooth, no germ pore visible.

Basidia 20-28 x 5-6 µ, 1-, 2- and 4-spored, sterigmata stout. Pleurocystidia none. Cheilocystidia 38-54 x 2-6 µ, cylindric to slightly clavate, in dried material mostly shriveled and not reviving. Caulocystidia (material sparse so no sections were made).

Gill trama interwoven, yellowish in KOH, reddish brown in Melzer's reagent. Pileus cutis of appressed hyphae bearing scattered to numerous more or less erect rusty brown hyphae as revived in KOH and reddish brown in Melzer's. Clamp connections none.

Habit, Habitat, and Distribution: On wood, Jamaica, December–January. Type studied.

Observations: This species is rather anomalous because of the white annulus and lack of clamp connections on the hyphae of the basidiocarp. We regard our characterization of it as tentative. With more specimens available for study for instance it may be found that some clamps are present.