Hymenogaster and related genera.pdf - MykoWeb

658 ANNALS OF THE MISSOURI BOTANICAL GARDEN
28. HIYMENOGASTER McMurphyi Zeller & Dodge, sp. nov.
(VoL. 21
Fructificationes oblate sphaeroideae vel irregulares, 1-1.5 cm. diametro
metientes, luteae, obscuriores siccatae, superficie fibrosa, subaspera; basis sterilis
parva, pulvinata; peridium 120-180 ,u (55-100 1A siceatum) crassitudine, luteum,
extus stuposum, intus laxe prosenehymaticum; gleba lutea vel "snuff-brown"
("bone-brown" siccata post conservationem); septa 24-32 ,u inter hymenia,
hyphis luteis laxe contexta, scissilia in angulis; basidia late clavata, tri- vel tetra-
spora, sterigmatibus tenuissimis, 5-7 1A longitudine, hyalina; sporae luteae, late
ovoideae, insuper rotundatae, saepe pedicellatae, episporio crasso, tenuibus cum
rugis brevibus, uniguttulatae, 12-13 (-14.5) x 9.5-11 (-14) ,u.
Type: in Dudley Herb. at Stanford, Zeller and Dodge
Herbaria.
Fructifications oblate-spheroidal to irregular, about 1-1.5
cm. in diameter, yellow, drying darker, surface fibrousroughened;
sterile base slight, pulvinate; peridium 120-180 j
(drying 55-100 /) thick, yellow, stupose without, loosely prosenchymatous
within; gleba yellow, then snuff-brown (drying
bone-brown after preservation); septa 24-32 , between hymenia,
of loosely interwoven yellowish hyphae, scissile at the
angles; basidia hyaline, broadly clavate, 3-4-spored with very
slender sterigmata 5-7 /A long; spores yellow, broadly ovoid,
rounded above, often pedicellate, exospore thick, sculptured by
small, short ridges, uniguttulate, 12-13 (-14.5) x 9.5-11(-14) .
In sandy soil, 7-10 cm. beneath the surface, under Fraxvinus
oreganc and Quercus agrifolia. California. February and
March.
CALFroRNIA: San Mateo County, Palo Alto, banks of Los Trancos Creek, near
Stanford University, Jaqmes MoMurphy 284, 292 type (Stanford, Zeller, and Dodge).
29. HYMENOGASTER DISCIFORMIS Hesse, Hypog. Deutschl. 1:
128. 1891; Sacc. Syll. Fung. 11: 171. 1895.
Type: location unknown to us.
Fructifications disciform, the size of a Bohemian "Heller-
linse "lentil, yellowish-white to cream-color; peridium thin,
composed of floccose, swollen hyphae as in. septa; gleba gray-
white, becoming cream-color; basidia short, narrow-cylindrical,
2-spored; spores 12-16 x 5-7 ,/, not apiculate, with a very short
but fairly broad pedicel, ellipsoid, exospore wrinkled, brown-
yellow.