112 THE CACTACEAE. 
5. Echinofossulocactus heteracanthus (Miihlenpfordt). 
Echtnocactus heteracanthus Miihlenpfordt, Allg. Gartenz. 13: 345. 1845. 
Echinocactus tetraxiphus Otto in Schumann, Gesamtb. Kakteen 363. 1898. 
Globose to short-cylindric, light green, nearly hidden by the closely set spines; ribs 30 to 34, 
much compressed, somewhat undulate; areoles white, hairy when young; radial spines 11 to 13 
(16 to 18, according to Schumann), acicular, white, spreading; central spines 4, brownish to flesh- 
colored, more or less annulate, compressed; flowers and fruit unknown to us, but greenish yellow, 
according to Schumann. 
Type locality: Real del Monte, Mexico. 
Distribution: Real del Monte, Hidalgo, Mexico. 
We have had this species in cultivation, but it never flowered and the plant has died. 
Schumann has given a good illustration of it. Rose, No. 8717, in part, from near Real del 
Monte, may belong here. 
Schumann took up an unpublished name of Otto (Salm-Dyck, Cact. Hort. Dyck. 
1844. 20. 1845) for this species. . 
Illustrations: Schumann, Gesamtb. Kakteen f. 63; Monatsschr. Kakteenk. 15: 160, 
as Echinocactus tetraxiphus. 
Fic. 118.—Echinofossulocactus loydii. 
6. Echinofossulocactus albatus (Dietrich). 
Echinocactus albatus Dietrich, Allg. Gartenz. 14: 170. 1846. 
Simple, depressed-globose, 10 to 12 cm. in diameter, glaucous, the apex covered with spines; ribs 
about 35, iat, undulate i spines yellowish white; radial spines 10, setaceous, 1 cm. long; central 
spines 4, the uppermost flat and annulate (according to : ct; 
flowers white, 2 cm. long. & te Schumann), the central terete, porrect 
Type locality: Mexico. 
Distribution: Mexico. 
We do not know this species. The plant described by S ifferent 
from the original of Dietrich. P cribed by Schumann may be differe 
