. The Cactaceae : descriptions and illustrations of plants of the cactus family. 178 THE CACTACEAE. to 7 cm. long; tube 2 cm. long; inner perianth-segments scarlet to white, oblong, obtuse to acute, reflexed; filaments white; style purple throughout; fruit obovoid, to 2 cm. long. Type locality: Brazil. Distribution: Mountains, state of Rio de Janeiro, Brazil. This species has been cultivated widely for many years under various names. It was introduced into cultivation about 1818 and, according to Edwards, flowered first in England in 1822 and has since been a great favorite as a household
. The Cactaceae : descriptions and illustrations of plants of the cactus family. 178 THE CACTACEAE. to 7 cm. long; tube 2 cm. long; inner perianth-segments scarlet to white, oblong, obtuse to acute, reflexed; filaments white; style purple throughout; fruit obovoid, to 2 cm. long. Type locality: Brazil. Distribution: Mountains, state of Rio de Janeiro, Brazil. This species has been cultivated widely for many years under various names. It was introduced into cultivation about 1818 and, according to Edwards, flowered first in England in 1822 and has since been a great favorite as a household plant, blooming freely about the end of the year, hence the name Christmas cactus. It is also called crab cactus and ringent-flowered cactus. Schumann gives as synonyms of this species Epiphyllimi salmoneum and E. spectabile, referring them to Cels's Catalogue, which, however, we have not Figs. 185 and i86.—Flowering branch and fruiting joint of Zygocactus truncatus. Cereus truncatus altensteinii (Salm-Dyck, Hort. Dyck. 65. 1834) occurs in literature, sometimes attributed to Otto, but we have seen no description. We follow Lofgren, who refers Zygocactus altensteinii to Z. truncatus. The type came from the Organ Mountains near Rio de Janeiro; in 1915, Dr. Rose visited these mountains, where he found the true Z. trujicatus. There are many garden varieties, most of which are very beautiful. Among these are Epiphyllum gibsonii, introduced in 1886, with dark orange-red flowers, and Epiphyllum guedeneyi, of unknown origin, with large flowers, the outer segments white, tinged with sulphur, and the inner ones creamy white; the variety is referred by some to Phyllocactus guedeneyi. Nicholson (Diet. Gard. i: 517) describes some of the best as follows: "Bicolor, white, edged with rose; coccineum, rich deep scarlet; elegans, bright orange-red, centre rich purple; magnijicum, flowers large, white, tips bright rose-colored; roseum, bright rose; ruckerianum, deep reddish purple,
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