[Vor. 5 
22 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
tion of fibrils; peridium very thick, 1-1.3 mm., simplex, cori- 
aceous, very compact, made up of closely woven, very small 
hyphae, hyaline except for the violet bloom at the surface; 
gleba buffy citrine to Saccardo’s olive; cavities globose to 
irregular, empty; septa about 75 шіп thickness, made up of 
closely woven, hyaline hyphae, not scissile; basidia clavate, 
inconspicuous, 7.515 и, hyaline; sterigmata half as long as 
the spores; spores acrogenous, olivaceous in mass, oblong- 
ellipsoidal, 6-7 X 3-4 y. 
Submersed or partially emersed. Australia, New Zealand, 
and Japan. 
This species is a very striking one. The gleba of dried 
specimens has a powdery appearance when cut, which, to- 
gether with its very thick peridium, would lead one to place 
it in Scleroderma. The gleba cracks off from the peridium 
very readily when dry, and a study of sections shows a very 
definite cleavage plane formed by a layer of pseudo- 
parenchyma between the gleba and the peridium. This fea- 
ture suggests Hysterangium and would lead one to place it 
there as that genus was understood by DeToni in Saccardo, 
but there is no indication of a base or columella, which is con- 
sidered an essential of this genus as understood by Tulasne 
and by Fisher in Engler & Prantl. 
Specimens examined: 
Australia: Victoria, Follett Co., Ғ. M. Reader, 8 (in Lloyd 
Mus., 06151). 
Japan: Negoya, J. Umemura (in Lloyd Mus., 164, under the 
name Hysterangium Phillips). 
2. Rhizopogon Rodwayi MacAlpine, Agr. Gaz. N. S. Wales 
6:11. 1895; бассагдо, Syll. Fung. 14 : 267-268. 1899. 
Illustration: MacAlpine, Agr. Gaz. N. S. Wales 6: pl. 4. 
f. 1-5. 
Type: loeation unknown to us. 
Fruetifieations oblong, tuberiform, irregular, length up to 
4 em. (teste MaeAlpine), 2-2.5 em. broad, color from light 
pinkish cinnamon to cinnamon; fibrils very large, loose, prom- 
inent but scanty, concolorous or somewhat darker; peridium 
