1924] Linder,—A New Species of Rhizopogon 195 
Tus Ponp. 
Coscinodiscus excentricus E. Hyalodiscus stelliger Bail. 
Coscinodiscus nodulifer A. 8. Navicula peregrina E. 
Coscinodiscus radiatus E. Tropidoneis Lepidoptera (Greg.) Cl. 
Soutu Ponp. 
Coscinodiseus excentricus E. Navieula formosa Greg. (Dominant 
Eupodiscus Argus E. ( = Aulacodiscus form here). 
Argus (E.) A. S.). Navieula (Stauroneis) Gregorii Ralfs 
Grammatophora macilenta W. 8. Navicula peregrina E. 
Hyalodiscus stelliger Bail. Rhabdonema Adriaticum K. 
Melosira sulcata K. Tropidoneis Lepidoptera (Greg.) Cl. 
(To be continued.) 
A NEW SPECIES OF RHIZOPOGON FROM NEW 
HAMPSHIRE. 
Davin H. LINDER. 
(Plate 148.) 
THE genus Rhizopogon, a member of the Hymenogastraceae, belongs 
among the higher Basidiomycetes, and is a group of puffball-like 
subterranean fungi. It differs from the puffballs in that the gleba 
does not break down and leave a cavity filled with spores and capil- 
litium, but retains the septa that divide the persisting gleba into 
small cavities which at maturity are filled with spores and have no 
capillitium. 
It was the writer's good fortune while spending the summer at 
Camp Algonquin in Holderness, New Hampshire, to find there in 
moist woods consisting chiefly of white birch,— Betula alba var. 
papyrifera (Marsh.) Spach,—but with here and there a group of 
hemlock trees, a fungus resembling Rhizopogon occidentalis Z. & D.! 
It was on an old, almost decayed stump in one of these groups of 
hemlock trees that this hypogeous fungus was found where it had 
been dug from near the base of the stump, presumably by a chip- 
munk which had carried it up to eat at leisure, and there had left it 
on being frightened by passers-by. 
The fungus when fresh was bright lemon-yellow, subglobose, and 
slightly lobed, measuring somewhat over three centimeters in diam- 
1 Zeller, S. M., & Dodge, C. W.— ‘Rhizopogon in North America." Ann. Mo. Bot 
Gard. 5: 1-36. 3 pls. 1918. 
