. Carnegie Institution of Washington publication. 112 THE CACTACEAE. 5. Echinofossulocactus heteracanthus (Mtihlenpfordt). Echinocactus 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; f
. Carnegie Institution of Washington publication. 112 THE CACTACEAE. 5. Echinofossulocactus heteracanthus (Mtihlenpfordt). Echinocactus 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 Schumann took up an unpublished name of Otto (Salm-Dyck, Cact.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 Fig. 118.—Echinofossulocactus lloydii. 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, flat, undulate; spines yellowish white; radial spines 10, setaceous, 1 cm. long; central spines 4, the uppermost flat and annulate (according to Schumann), the central terete, porrect; flowers white, 2 cm. long. Type locality: Mexico. Distribution: Mexico. We do not know this species, from the original of Dietrich. The plant described by Schumann may be different. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemb
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