. Carnegie Institution of Washington publication. 218 THE CACTACEAE. 1. Aporocactus leptophis f De Candolle) Britton and Rose, Contr. U. S. Nat. Herb. 12: 435. 1909. 1'i-ri-ii* li'f'ln/ili/s IV Caiidollc, Mi'-in. Mu«. Hist. Nat. Paris 17: 117. 1828. <'f7v;o flagelliformis li'l'lnfhis Schumann, Gesamtb. Kuktccn 143. 1897. (Jften creeping; branches cylindric, 8 to 10 mm. thick, rather strongly 7 or 8-ribbed; ribs obtuse, somewhat repand; areoles velvety, with 12 or 13 rigid setaceous spines; flower-tube curved just above the ovary; perianth-segments narrowly oblong, 2 to 3 cm. long, about 6 m
. Carnegie Institution of Washington publication. 218 THE CACTACEAE. 1. Aporocactus leptophis f De Candolle) Britton and Rose, Contr. U. S. Nat. Herb. 12: 435. 1909. 1'i-ri-ii* li'f'ln/ili/s IV Caiidollc, Mi'-in. Mu«. Hist. Nat. Paris 17: 117. 1828. <'f7v;o flagelliformis li'l'lnfhis Schumann, Gesamtb. Kuktccn 143. 1897. (Jften creeping; branches cylindric, 8 to 10 mm. thick, rather strongly 7 or 8-ribbed; ribs obtuse, somewhat repand; areoles velvety, with 12 or 13 rigid setaceous spines; flower-tube curved just above the ovary; perianth-segments narrowly oblong, 2 to 3 cm. long, about 6 mm. wide. Type locality: Mexico. /Distribution: Mexico. Illustrations: De Candolle, Mem. Cact. pi. 12; Korster, Handb. Cact. ed. 2. f. 96; Riimplcr, Sukkulenten f. 68, all as Cereus leptophis. Plate XL, figure i, shows a flowering plant in the collection of the New York Botanical Garden. Figure 297 is reproduced from the first illustration above cited. 2. Aporocactus flagelliformis (Linnaeus) Lemaire, Illustr. Hort. 7: Misc. 68. 1860. Cactus flagelliformis Linnaeus, Sp. PI. 467. 1753. Cereus flagelliformis Miller, Card. Diet. ed. 8. No. 12. 1768. Cereus flagelliformis minor Salra-Dyck in Pfeiffer, Enum. Cact. in. ; Stems at first ascending or erect, but weak and slender or pendent, i to 2 cm. in diameter; branches often prostrate and creeping or even pendent; ribs 10 to 12, low and inconspicuous, a little tuberculate; areoles 6 to 8 mm. apart; radial spines 8 to 12, acicular, reddish brown; central spines 3 or 4, brownish with yellow tips; flowers 7 to 8 cm. long, opening for 3 or 4 days, crimson; outer perianth-segments narrow, more or less reflexed; inner perianth-segments broader, only slightly spreading; fruit globose, small, 10 to 12 mm. in diameter, red, bristly; pulp yellowish. Type locality: At first supposed to be from South America. Distribution: Reported from Mexico, Central America, and South America; nowhere known to us in the wild state. Said to have bee
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