[Vor. 5 
8 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
and the colors of the two are distinct. The septa of R. Briardi 
are composed of a pseudo-parenchymatous tissue, while in 
R. pannosus the hyphae are loosely woven and the septa are 
somewhat scissile and about twice as broad as in R. Briard. 
Specimens examined: 
Washington: Klickitat Co., Falcon Valley, W. N. Suksdorf, 
629, 1029 (in Lloyd Mus., 5603 and 11443, respectively). 
California: Mariposa Co., W. A. Setchell, type (in Zeller 
Herb., 1380, and in Dodge Herb., 835). 
4. Rhizopogon diplophloeus Zeller & Dodge, sp. nov. 
Fructificationes globosae vel irregulares, diametro 1-2.5 cm. 
metiens, argillaceae recens lectae, tactu brunnescentes, demum 
"Verona brown" (Ridgway) et nigrescentes siccatae; funiculi pauci 
radicantes, innati-applicati, nigri; peridium crassum, duplex, stratum 
exterum 140-180 p crassitudine, x ra bulbosis, sub lente fulvis, 
laxe complexum; stratum interum 260-300 m crassitudine, hyphis 
melleis dense compactum; gleba "Isabella-color" ( Ridgway) ful- 
vescens, siecata ossea, nigrescens; locelli globosi, irregulariusculi, 
recens vacul, maturitate sporis repleti; septa 30-40 д crassitudine, 
hyphis subhyalinis compacta, non scissilia ; basidia clavata, 25-30 
12-18 y, hyalina, di- vel octospora, vulgo ‘octospora, sterigmatibus 
6-10 y арена sporae асгорепае, ellipsoideae, dilute cremeae 
sub lente, leves, 5.3-7 Х2-3.б y, diguttulatae 
Habitat inter тоша yp pedati in pue rupium. Wash- 
ington. Aestate. 
Type: in Zeller Herb., Dodge Herb., and Mo. Bot. Gard. 
Herb. 
Fructifications globose to irregular, 1-2.5 em. in diameter, 
*eJay colored’’ when fresh, becoming darker when bruised, 
Verona brown to nearly black when dry; fibrils scanty, in- 
nate-appressed, black when dry, leading to rhizomorphs; pe- 
ridium 400—480 y thick, duplex, the outer layer dark tawny un- 
der the microscope, about 140-180 д thick, composed of irregu- 
larly swollen hyphae, loosely interwoven, the inner layer 
honey-eolored, about 260-300 ш thick, composed of closely 
woven hyphae; gleba from Isabella-color to brown or almost 
black on drying, bony hard when dry; cavities subglobose to 
somewhat irregular, empty when young, filled with spores at 
maturity; septa 30-40 д thick, composed of compact, sub- 
hyaline hyphae, not scissile; basidia clavate, 25-30 12-18 y, 
