Hymenogaster and related genera.pdf - MykoWeb

668 ANNALS OF; THE MISSOURI BOTANICAL GARDEN
[VOL. 21
38. HYMENOGASTER RENIFORMIS Hesse, Hypog. Deutschl. 1:
119. 1891; Sacc. Syll. Fung. 11: 171. 1895.
Type: location unknown to us.
Fructifications the size of a pea or smaller, reniform, amberyellow,
smooth above; peridium scarcely a line thick, composed
of very slender, gelified hyphae; gleba somewhat fleshy and
yellowish, cavities small but visible to the naked eye; septa
yellow, composed of thin-walled, slender hyphae; basidia narrow,
2-spored, not projecting much beyond the paraphyses;
spores 16-20 x 8-10,ff, with a short, blunt apiculus, appendiculus
1 x 1 L, exospore wrinkled, dark yellow.
In sandy soil under Fagus. Hessen-Nassau, Germany.
August to October.
IThe spores are near those of H. lilacinus' Tul. but are narrower,
-and the appendiculus is thinner.
39. HYMENOGASTER occidentalis Zeller & Dodge, sp. nov.
Fructificationes laeves, 1-2 cm. diametro metientes, subsphericae, rugosae vel sul-
catae, "pale tan" rubro-maculatae recens, "pinkish buff" vel "clay color" sicca-
tae; peridium byssoideum, stuposum, fibrillosum, hyalinum, 50-100 ,u crassitudine;
gleba grisea, "snuff-brown " siccata, locellis magnis; septa fragilia, tenuia, 15-19 ,u
(ad 74 /A hymeniis inclusis) crassitudine, prosenchymatica, sublutea siccata; basidia
cylindrica, angusta, 30-34 x 4-5 A, 2- vel 4-spora; sporae ellipsoideae, sublatae, apic-
ulatae vel rotundatae in aliquantulis sporis maturis, pedicello brevi, utriculo laevi,
episporio verrucoso, 20-26 x 12-15 A; odor terreus.
Type: in Zeller and Dodge Herbaria.
Fructifications smooth to silky, 1-2 cm. in diameter, sulcate-
rugose to subglobose, pale tan, flecked with small patches of
pink, or red, drying pinkish-buff to clay-colored; peridium of
a byssoid, stupose, or meshy fibrillose texture, hyaline, 50-100 u
thick; gleba grayish, drying snuff-brown, cavities relatively
large; septa brittle, thin, papery, 15-19 ,f thick (74 ,t including
hymenia), prosenchymatous, hyaline to yellowish when dry;
basidia cylindrical, narrow, 30-34 x 4-5 ,/, 2- or 4-spored; spores
mostly ellipsoid, slightly broad-apiculate, sometimes maturing
with a broad rounded tip, pedicel notched, short, surface warted
(warts mostly retrorse) and covered by a smooth utricle,
20-26 x 12-15 u. Odor earthy.