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Spines small, usually inconspicuous: fls. nocturnal, usually very large, with red or greenish sepals, white or pinkish petals: fr. large, spineless, covered with numerous If .-like bracts.—Some 16 species of this genus are known, but only 1, and that under a wrong name, is grown to any extent in this country. The species are easily grown in hothouses, especially if given a wall to climb upon. A very curious small-fld. species, H. minuliflorus, has recently been described by Britton & Rose. It flowers freely in Washington and New York, but as yet has not been very widely distributed.
Spines small, usually inconspicuous: fls. nocturnal, usually very large, with red or greenish sepals, white or pinkish petals: fr. large, spineless, covered with numerous If .-like bracts.—Some 16 species of this genus are known, but only 1, and that under a wrong name, is grown to any extent in this country. The species are easily grown in hothouses, especially if given a wall to climb upon. A very curious small-fld. species, H. minuliflorus, has recently been described by Britton & Rose. It flowers freely in Washington and New York, but as yet has not been very widely distributed.
H. extensus, Brit. & Rose (Cereus extensus, Salm-Dyck). Sts. creeping, perhaps also sometimes climbing, bearing aerial roots, green, rather slender, 3-sided, with obtuse angles: fls. large and handsome; sepals tipped and margined with red; petals rose-colored; style thick, longer than the stamens. This species was described by De Candolle in 1828, but it is unknown in cult, and in a wild state. A species under this name was figured in B. M. for 1844, but this may or may not be the plant described by De Candolle.— H. napoleonis, Brit. & Rose (Cereus napoleonis, Graham). Sts. much branched, with 3 acute angles; spines 4-5, rigid, 4-5 lines long; fls. 8 in. long; sepals yellow; petals pure white. This species is not in cult, and is not known in the wild state. It was described and figured from a plant which flowered in Edinburgh about 1836. It is occasionally reported in cult.; but all such material seems to be wrongly identi6ed. J. N. Rose.
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