Externally almost naked, smooth. No edible species reported.
I.—Aleuria Fr.
Fleshy or fleshy-membranaceous, externally powdered or with a woolly scurf.
[*] Macropodes—macros, long; podes, feet. Stem firm, elongated, furrowed.
[**] Cochleata—cochleatus, spiral. Subsessile, oblique or twisted.
[***] Cupulares. Subsessile, regular.
**** Humaria. Small, somewhat fleshy, margin downy. (None known to be edible.)
***** Encœlia. More or less coriaceous. (None known to be edible.)
* Macropodes. Stem firm, elongated, etc.
P. aceta´bulum Linn.—a cup. Ascophore stipitate, cup-shaped, fleshy, rather tough, disk dark umber-brown, externally paler and minutely scurfy or flocculose; mouth somewhat contracted; 1.2–2 in. broad, 1.2–1.4 in. high. Stem .4-.6 in. high, often .4 in. thick, imperfectly hollow, with parallel or anastomosing ribs, which continue for some distance up the ascophore as branching veins, pale umber; cells of the cortex give off short, rather closely septate hyphæ in groups; asci cylindrical, 8-spored. Spores obliquely 1-seriate, hyaline, smooth, broadly elliptical, ends obtuse, with a very large oil-globule, 18–22×12–14µ; paraphyses straight, septate, the brownish, clavate tip 5–6µ thick.