[Vor. 11 
406 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
mendations of the Committee on Nomenclature of the Botanical 
Society of America! both point to the adoption of this species as. 
the type of this genus. 
Fructifications globose to irregular, hypogaeous; columella, 
stipe, or sterile base none; peridium usually thin and fragile, 
simplex, white; gleba white or slightly yellowish; cavities filled 
with hyphae bearing spores terminally on short branches; septa 
thin, homogeneous; spores echinate or reticulate at maturity, sur- 
rounded by a gelatinous sheath, globose, resembling those of 
Leucogaster. 
From our study of the young stages of Leucogaster floccosus 
Hesse (p. 390), it seems probable that eventually Leucophlebs 
will be recognized as the chlamydosporic condition of Leucogaster, 
or retained as a hypogaeous genus of the Fungi Imperfecti. 
1. Leucophlebs magnata Harkness, Cal. Acad. Sci. Proc. Bot. 
ПІ. 1: 257-258. 1899; Roumeguére, Rev. Myc. 22: 83. 1900; 
Saccardo & Sydow іп басс. Syll. Fung. 16: 252. 1902. 
Illustrations: Harkness, Cal. Acad. Sci. Proc. Bot. III. 1: pl. 42. 
f. 7a-7c; Rev. Мус. 22: pl. 204. f. 6-8. 
Type: cotype in Dudley Herb. at Leland Stanford Jr. Univ. 
Fructification 3 em. in diameter, subglobose or elongate, white, 
smooth; peridium 120-150 џ thick, composed of fine, thick-walled, 
closely woven hyphae, white; gleba white, the freshly cut surface 
showing a blue tint which soon vanishes; cavities decreasing m 
size toward the surface, full of cobwebby hyphae like a capil- 
litium; septa thin, homogeneous, 60-80 д thick, composed of 
closely woven, hyaline hyphae ; spores borne terminally on long 
slender branches of the cavity hyphae, hyaline, spherical, echin- 
ate, enclosed in a gelatinous sheath, 13 u in diameter. 
Under Acer and Quercus. Oregon to California. April and Мау. 
In Harkness, 100b, crystalline matter is found in the peridium 
and in Harkness, 154b, the spores become quite thick-walled. 
The spines on the spores are arranged in rows, giving the appear- 
ance shown by Harkness (І.с., f. 7c) when not quite in focus. 
Specimens examined: 
' Committee on Nomenclature of the Botanical Society of America. Report. 
Bot. Soc. Am. Publ. 73: 70-71. 1919 (see p. 71). 
