BOT.-VOL. I.] HARKNESS—CALIFORNIAN HYPOG^I. 257 



Collected under oaks at the following localities in. Cali- 

 fornia during April: Tamalpais and Mill Valley, Marin 

 County; Auburn, Placer County; Calistoga, Napa County. 



40. Hysterangium fuscum, sp. nov. 



Minute, dirty white, globose; mycelium flocculent at base; gleba elastic; 

 veins white; hymenium brown; spores elliptical, 6 x 12 ix. 



Type, No. 177, Harkness Coll. 



Under Arbutus Menziesii, Mill Valley, Marin County, 



Calif., April. 



Rhizopogon Tul. 



Rhizopogon Tul., Fungi Hypo., p. 85, Tab. I, fig. 5, Tab. II, fig. i, et 

 Tab. XI, figs. 4-5- 



Peridium continuous or cracked, adhering to creeping branched fibers which 

 traverse its surface. Cavities distinct, at first empty. Spores smooth, oblong- 

 elliptic. (Berk. Outlines Brit. Fung., p. 294.) 



41. Rhizopogon aurantius, sp. nov. 



Subglobose, 2 cm. in diam., color dirty white; peridium attenuate; gleba 

 pale orange, the freshly cut surface showing a creamy exudation; cells large; 

 cell-walls thin but firm; spores subglobose, with colorless oil globule, 8-io,« 

 in diam. 



Type, No. 74, Harkness Coll. 



Solitary in dense forests of Sequoias, deeply hidden by 



decaying vegetation, Mt. Tamalpais, Marin County, Calif., 



August. 



Leucophleps, gen. nov. 



Globose or roundly elongate, color white or citron, dense; gleba multi- 

 locular; cells crowded; veins pearly white; spores spherical or ovoid and 

 borne upon elongated sterigmata. 



42. Leucophleps magnata, gen. et sp. nov. 

 Plate XLII, Figs. 7^-7^. 



Large, 3 cm. in diam., subglobose or elongate, white, smooth, solid; perid- 

 ium wanting, white; the freshly cut surface sometimes showing a blue tint 

 which soon vanishes; multilocular cells irregularly decreasing in magnitude 



(2) June 27, 1899. 



