. The Cactaceae : descriptions and illustrations of plants of the cactus family. MAMILLOPSIS. 19 4. MAMILLOPSIS * (Morren) Weber. Cespitose cacti, often forming large clusters, globular or short-cylindric, completely hidden under a mass of long, soft, white, hair-like spines; tubercles not arranged in ribs, more or less conic, not grooved above, spine-bearing at apex, their axils pubescent and bristly; radial spines numerous, weak, straight; central spines 4 to 6, with yellow, hooked tips; flowers from near top of plant but apparently from axils of old areoles, with a regular, straight, slende
. The Cactaceae : descriptions and illustrations of plants of the cactus family. MAMILLOPSIS. 19 4. MAMILLOPSIS * (Morren) Weber. Cespitose cacti, often forming large clusters, globular or short-cylindric, completely hidden under a mass of long, soft, white, hair-like spines; tubercles not arranged in ribs, more or less conic, not grooved above, spine-bearing at apex, their axils pubescent and bristly; radial spines numerous, weak, straight; central spines 4 to 6, with yellow, hooked tips; flowers from near top of plant but apparently from axils of old areoles, with a regular, straight, slender, scaly tube and a broad, spread- ing limb; perianth-segments oblong, obtuse; stamens and style erect, long-exserted beyond tube; scales on flower-tube orbicular, obtuse. Schumann associated Mammillaria senilis Loddiges, the type of the genus, with species now referred to Cocliemiea, treating them all as a subgenus of Mammillaria, but Cochemiea has an irregular flower and otherwise is different from this genus. Morren first proposed the subgeneric name Mamillopsis, but Weber, we believe, was justified in recognizing the genus. He states, very properly, that the flowers are very unlike those of any of the species of Mammillaria. He also calls attention to the long- exserted stamens, and long and scaly flower-tube, and also to the fact that the filaments are borne in two series, one series being on the flower-tube. The ovary, too, seems to be scaly, and doubtless other differences will be recorded when the species are better known. Two species are here recognized, both from the high mountains of Mexico. The generic name, Mamillopsis, means Mammillaria-li'ke. Key to Species. Flowers 6 to 7 cm. long, orange-yellow i â M. senilis Flowers 3 cm. long, deep red 2. M. diguetii. -Mamillopsis senilis. 1. Mamillopsis senilis (Loddiges) Weber. Mammillaria senilis Loddiges in Salm-Dyck, Cact. Hort. Dyck. 1849. 82. 1850. Cactus senilis Kuntze, Rev. Gen. PI. i: 261. i8gi. Not Haworth, 1824.
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