87] Cactaceae. 87 



CepJialocereus hermentianus (Monv.) Britton and Eose 1. c. p. 416 (= Cereus 



hermentianus Monv. = Pilocereiis hermentianus Lern.). — Haiti. 

 C. keyensis Britton and Rose 1. c. p. 410. — Florida (Britton n. 518). 

 C. lanuginosus (L.) Britton and Rose 1. c. p. 417 (= Cadus lanuginosus L. 



= Cereus lanuginosus Mill. — C. repandus Mill. = Pilocereus lanuginosus 



Rümpl.). — South America. 

 C- leucocephalus (Poselg.) Britton and Rose 1. c. p. 417 (= Pilocereus leuco- 



cephalus Poselg. = P. Försferi Lern. = P. HouUetii Lern, = Cereus 



Houlletii Berger). — Mexiko. 

 C. Maxonii Rose 1. c. p. 417. PI. LXIV. — Guatemala (Maxon n. 3769. 3381, 



Kellerman n. 7061). 

 C. Millspa^ighii Britton 1. c. p. 417. — Bahamas (Britton and Millspaugh 



n. 2832). 

 C. monodonos (DC.) Britton and Rose 1. c. p. 418 (= Cereus monoclonos DC). 

 C. nohilis (Haw.) Britton and Rose 1. c. p. 418 (= Cereus nobilis Haw. = Cactus 



strictus Willd. = Cereus strictus DC. = Pilocereus strictus Rümpl. = P. 



nohilis Schum. = Cactus Katvorthü Spreng. =: Cereus Haworthii DO. 



=: Pilocereus Haworthii Console = P. Consolei Lern. = Cereus Curtisii 



Otto = Pilocereus Curtisii Salm-Djck). — West-Indien. 

 C. Palnieri Rose 1. c. p. 418. — Mexiko (Palmer n. 362, Nelson n. 6665), 

 C polygonus (Lam.) Britton and Rose 1. c. p. 418 (= Cactus polygonus Lam. 



= Cereus polygonus DC. = Pilocereus Plumieri Lern.). — Santo Domingo. 

 C- polylophus (DO.) Britton and Rose 1. c. p. 419 (= Cereus polylophus DC, 



= Pilocereus polylophus Salm-Dyck). — Mexiko. 

 C Royeni (L.) Britton and Rose 1. c. p. 419 (= Cactus Royeni L. = Cereus 



Royeni Haw. = Pilocereus floccosus Lam. = Cereus armatus Otto =^ C. 



floccosus Otto ^= Pilocereiis Royeni Rümpl. — P. fouachinus Weber). — 



Amerika, St. Croix. 

 C- Sartorianus Rose 1. c. p. 419. — Mexiko (Purpus and Sartorius). 

 C. scoparius (Poselg.) Britton and Rose 1. c. p. 419 (= Pilocereus scoparius 



Poselg.). -- Mexiko. 

 C. Swartzii (Griseb.) Britton and Rose 1. c. p. 420 (= Cereus Swartzii Griseb.). 



— Jamaika. 

 C TJrbanianus (Schum.) Britton and Rose 1. c. p. 420 (= Pilocereus Urbanianus 



Schum.). — Guadeloupe. 

 Echinocactus megarrhizus Rose in Contrib. U. S. Nat. Herbarium Washington 



XII (1909). p. 290. — Mexiko (Palmer n. 107. 1907). 

 E. Palmeri Rose 1. c. p. 290. PI. XXIII. — Zacatecas (Palmer n. 324, Lloyd 



n. 12). 

 E. victoriensis Rose 1. c. p. 291. — Mexiko (Palmer n. 267). 

 Echinocereus rigidissimus (Engelm.) Rose 1. c. p. 293 (= E. pectinatus rigidis- 



simus Engelm. = E. pectinatus robustus Bauer). — Mexiko. 

 E. centralis (Coult.) Rose 1. c. p. 293 (= Cereus pectinatus centralis Coult. = 



Echinocereus pectinatus centralis Schum.). — Mexiko. 

 E. Baileyi Rose 1. c. p. 403. PI. LVI. LVII. — Oklahoma. 

 fleliocereus Britton and Rose gen. nov, 1. c. p. 433. 



Sterns usually weak, procumbent or climbing over rocks and 



bushes, in cultivation often erect; branches strougly angled, giving off 



roots irregulary; ribs usually 3 or 4, sometimes 7; spines of all areoles 



similar; flowers diurnal, large for the size of the plant, only one from 



