[Vor. 5 
16 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
Specimen examined: 
Alabama: Lee County, Auburn, F. S. Earle (in U. S. Dept. 
Agr., Bur. Pl. Ind. Path. Coll.). 
10. Rhizopogon roseolus (Corda) Zeller & Dodge, comb. 
nov. 
Splanchnomyces roseolus Corda in Sturm, Deutschl. Fl. 3: 
3-4. 1831; Icones Fung. 6:38. 1854.—Rhizopogon rubescens 
Tulasne, Giorn. Bot. Ital. 2: 58. 1844 (in part), as also later 
writers.—M ylitta roseola Fries, Index Syst. Myc. 178. 1832; 
Summa Veg. Scand. 2 : 436 (note). 1849. 
Illustrations: Corda in Sturm, Deutschl. Fl. 3: pl. 2; Icones 
Fung. 6: pl. 7. f. 68; Nees von J.senbeck, Th. F. L. & Henry, 
A. Syst. d. Pilze 1: pl. 10. 
Type: authentie specimen unknown to us, probably non- 
existent. 
Fructifications globose to irregular, 1.5-3 em. in diameter, 
cinnamon-buff to Verona brown and even blackening on dry- 
ing; fibrils scanty or " appearing, innate-appressed, black 
when dry; peridium thin, 160—300 д thick, compact, tawny 
under the mieroscope; gleba from warm buff to buckthorn- 
brown when dry, brittle; caviti.. subglobose and folded to 
labyrinthiform, empty; septa about 100 д broad, made up 
of closely woven, branching, hyaline hyphae with thick gelat- 
inized walls, not scissile; basidia ellipsoid, 12-137 и, with 
small-lumened, heavily gelatini walls, mostly 1-2-врогед, 
seldom 3-5; sterigmata 10-14 u long; spores oblong to ellip- 
soid, acrogenous, dilute cream-colored under the microscope, 
heavy-walled, smooth, 2-guttulate, with an equatorially placed 
nucleus, making the spores appear 1-septate, 8-12 3-5.5 д. 
In Europe and the United States. 
While we have not studied type material of R. roseolus, we 
feel confident that this species is the one which Corda had be- 
fore him when he made his drawings. Owing to certain prob- 
able inaccuracies of representation, we have thought best to 
present drawings from American material. 
Specimens examined: 
Exsiccati: Ellis, N. Am. Fung., 943; Ell. & Ev., Fung. Col, 
cont. Shear, 1413. 
