CORYPHANTHA. 37 
lowish, 10 to 12 mm. long, rigid, tomentose when young; flowers lemon-yellow, with outer segments 
tinged with red, about 10 cm. broad, the segments narrowly oblong to spatulate, acute, somewhat 
toothed toward the apex. 
Type locality: Mexico. 
Distribution: Central Mexico. 
It is difficult to ascertain what the true Mammillaria radians of De Candolle really is. 
The type plant was described from specimens collected by Thomas Coulter, probably in 
eastern Mexico. We believe that specimens collected by Dr. Edward Palmer near San 
Iuis Potosi, Mexico, represent the species as well as any plants we have yet seen; these, 
however, are cespitose as well as solitary. The species seems nearest Coryphantha com pacta. 
Cactus radians pectinoides Coulter, based on Eschanzier’s plant from San Luis Potosi 
(1891), we have not seen but suspect that it belongs here. 
Fic. 35.—Coryphantha sulcolanata, 
Fic. 34.—Coryphantha radians. 
Mammillaria monoclova is only a garden name cited by Schumann (Gesamtb. Kakteen 
495. 1898) as a synonym of this species. — — 
Coryphantha impexicoma, credited to Lemaire, is given as a synonym of Mammillaria 
cornifera impexicoma Salm-Dyck by Riimpler (Férster, Handb. Cact. ed. 2. 414. 1885). 
Illustrations: Blithende Kakteen 2: pl. 102; Tribune Hort. 4: pl. 139; Succulenta 5: 
57, as Mammillaria radians; Monatsschr. Kakteenk. 15:7, as M. radians im pexicoma. 
Figure 34 is from a photograph of the plant collected at San Rafael by Dr. Chaffey 
in 1910, 
21. Coryphantha sulcolanata Lemaire, Cactées 35. 1868. 
Mammillaria sulcolanata Lemaire, Cact. Aliq. Nov. 2. 1838. 
- Echinocactus sulcolanatus Poselger, Allg. Gartenz. 21: 102, 1853. 
Mamumillaria conimamma Linke, Allg. Gartenz. 25: 239. 1857. ‘ gs 
> Mammillaria cornimamma N. E. Brown, Gard. Chron. III. 2: 186. 1887. 
“ Cactus sulcolanatus Kuntze, Rev. Gen. PI. 1: 261. 1891. . 
Subglobose, somewhat depressed, cespitose, 5 cm. high, 6 cm. thick or more; tubercles some- 
what 5-angled at base, subconic above, their axils very woolly when young; spines 9 or 10, a rac ial, 
unequal, 12 to 16 mim. long, the lower and upper weaker and shorter than the lateral ones, brownish 
with black tips, but when young whitish yellow with purple tips; flowers large, 4 cm. long or more, 
widely spreading, 6 cm. broad or more; perianth-segments oblong, acute. 
