1918] 
ZELLER AND DODGE—RHIZOPOGON 21 
Hysteromyces vulgaris Vittadini, Notiz. nat. e civ. sulla 
Lombardia 1 : 341. 1844. 
Type: unknown to us. 
This variety differs from В. rubescens in that it has a 
thicker peridium (260-400 u) which does not redden so dis- 
tinetly on exposure to the air; the spores are smaller 
(6-83 и); septa mostly as in В. rubescens but occasionally 
scissile. The hyphae of the fibrils are brown and septate with 
clamp connections. 
Specimens examined: 
Italy: Trentino, Coredo, Val d’Non, M. Bezzi (in Lloyd Mus., 
08739). 
Massachusetts: Boston, S. Davis (in Lloyd Mus., 5914, under 
the name Rhizopogon roseus Bresadola in herb., 5915). 
Maryland: Georgetown, H. Н. Whetzel € Rhoads (in Fitz- 
patriek Herb., 1152, N. Y. State Coll. Agr. at Cornell Univ., 
Dept. Pl. Path. Herb., 10158, Zeller Herb., 1406, and in 
Dodge Herb., 840). 
Texas: Houston, G. L. Fisher, 64 (in Lloyd Mus., 64). 
Washington: Bingen, W. N. Suksdorf, 807, 809 (in Lloyd 
Mus., 7296 and 7301, respectively). 
EXTRA-LIMITAL SPECIES 
The following are descriptions of species of Rhizopogon 
not as yet found in North America, but are included in order 
to assist in referring material to them in ease they should 
be discovered later, as the individual species are found to 
have a very wide range. The descriptions in which no speci- 
mens are cited as having been examined, are compiled from 
the original descriptions, except as otherwise noted, and are 
translations or copies of them. As no material referable to 
them has been examined nor the types studied, we can form 
no opinion as to their validity. 
1. Rhizopogon violaceus Cooke & Massee, Grev. 21:1. 
1892; Saccardo, Syll. Fung. 11 : 170. 1895. 
Type: Kirk, 382 in Kew Herb. not studied. 
Fructifications globose, drying angular, diameter up to 
2.5 em. when dry, vinaceous-fawn to fawn-color; no indica- 
