284 



CEREUS 



CEROPEGIA 



with pink, nocturnal. W. Ind. and Mex. The plant 

 much resembles C. grandiflorus, but is easily distin- 

 guished by its smaller and different colored fls. 



53. Martianus, Zucc. Of bushy growth, branching, 

 reaching a height of 3 ft. and more ; branches slender, 

 provided here and there with aerial, roots, cylindrical, 

 about %in. in diam : ribs commonly 8, straight, sepa- 

 rated by sharp grooves, very low : areolse %-% in. 

 apart, small, white : radial spines 6-10, bristle-form, 

 spreading, clear honey-yellow, at base brownish, later 

 whitish and becoming gray, about %in. long ; centrals 

 3-4, similar, only somewhat stouter and darker : fls. 

 usually abundant, straight or slightly S-shaped, 4-5 in. 

 long, scarlet-red : fr. spherical, reddish green, covered 

 with bristles. Southern Mex. B.M. 3768. 



BB. fiibs of stem 3-5. 



54. nycticalus, Link. NIGHT-BLOOMING CEREUS. Sub- 

 erect, very long- jointed, %-l in. in diam. : joints vari- 

 able, some cylindrical, others 4-6-angled : ribs acute 

 at first, obtuse later : spines 1-4, and very small : fls. 

 white and fragrant, about 7 in. long. Mex. The com- 

 monest Night-blooming Cereus. 



55. inermis, Otto. Sts. branching, climbing, branches 

 4-5-angled, sharp-winged, yellowish green, later darker, 

 slightly crenate : areolae in the depressions, small, 

 bearing a few bristles when young, but soon naked. 

 Venezuela. 



56. hamatus, Scheidw. (C. rostratus, Lem.). Stems 

 slender, weak, climbing, bright green, less than 1 in. in 

 diam., reaching a length of 10ft. : ribs remotely serrate, 

 the serrations repand, and bearing on their anterior 

 edge the small areolee: spines 5-6, bristle-form, whitish 

 to brown, very short and partly deciduous : fls. large, 

 10-16 in. long and nearly the same in diameter, white, 

 nocturnal. Central Mexico. 



57. Regelii, Hort. This form is very common in the 

 trade ; is a very excellent plant, with good, fixed char- 

 acters ; is a slender climbing plant. Its origin is ob- 

 scure, but, from its vegetative characters, as well as 

 floral, it is apparently closely related to either G. hama- 

 tus or C. MacDonaldice, with one of which it may be a 

 hybrid. 



58. Napoleonis, Graham. Suberect and long- jointed, 

 the joints 3-angled and with flat sides, 12 in. or more 

 long, %-l in. in diam. : spines 3 or 4, subulate, unequal, 

 black; sometimes a few white bristles: fls. snowy white, 

 8 in. long and 6 in. broad: fr. bluish and spiny, 3 by 4 

 in. W. Ind., Mex. B.M. 3458. 



59. ext6nsus, Salm-Dyck. Climbing : stems richly 

 branching, about 3 ft. long by about %in. in diam., dark 

 green, soon becoming covered with gray-yellow, corky 

 flakes : 3-angled, angles blunt, later becoming depressed, 

 so that the older stems are cylindrical : areolae K-2% 

 in. apart, white, becoming gray: spines 2-4, very short 

 and strong, straight or very slightly curved, dark brown, 

 becoming gray with age : fls. from the sides of the 

 branches, 8-9 in. long, rose-red. Trinidad. B.M. 4066. 



60. triangnlaris, Haw. Stems jointed, long and slen- 

 der, climbing : ribs 3, compressed, thin, and about 1 in. 

 or more high, crenate, with a corneous margin connect- 

 ing the areolse : areolae about 1-1% in. apart : radial 

 spines 2-4, bristle-form, short, soon deciduous ; centrals 

 1-3, conical from a bulbous base, dark colored : fls. 

 large, about 1 ft. long by about the same diameter when 

 fully open, white, nocturnal, tube covered with large, 

 leaf -like scales : fr. large, covered with the persistent 

 large scales. Mexico and West Indies. B.M. 1884 Mn. 

 6:5. The fruit is edible and very refreshing, and is 

 common in the Mexican markets. ' 



BBB. Ribs inconspicuous or wholly absent. 



61. MacD6naldiae, Hook. Climbing, and of rapid 

 growth, richly branching, branches very long, cylindri- 

 cal or with here and there very obtuse and not continu- 

 ous angles, dark green : areolae elevated on tubercles 

 which are arranged spirally on the branches, small : 

 spine solitary (or rarely 2), short, porrect, brown or 

 black, inconspicuous : fls. lateral, about 14 in. long, white, 



nocturnal. Honduras. B.M. 4707. 



The following horticultural names, in the Amer. 

 trade, are not accounted for in the foregoing synop- 

 sis: C. Chlldsii, C. diversispina, C. erectus, C. fari- 

 nbsus, C. frdgilis, C. Gebseri, C. Guadalupdnus , C. 

 Zaucacdri. 



The following names, in the Amer. trade, belong 

 to Echinocereus : C. Berlandi&ri, C. ccespitbsus, C. 

 chlordnthus, C. coccineus, C. conoideus, C. ctenoldes, 

 C. dasyacdnthus, C. dubius, C. Engel- 

 manni, C. enneacdnthus, C. Fendleri, C. 

 gonacdnthus, C. longisetus C. Moja- 

 vensis, C. paudsplnus, C. pectindtus, 

 C. phoenice^, C. prociimbens, C. Roet- 

 teri, C. Scheeri (Schlini), C. stramineus, 

 C. tuberosus, C. viridiflbrus . 



C. cylindricus is Opuntia. C. Nickelsii 

 and C. senilis are Pilocereus. 



JOHN M. COULTER and 

 C. H. THOMPSON. 

 CERlNTHE (Greek, keros, wax; 

 anthos, flower : the ancients be- 

 lieved that the bees visited the 

 flowers for wax). Boraginacece. 

 About 6 species of annual or per- 

 ennial herbs from Europe and Asia 



Minor, with alternate, glaucous Ivs. and showy purple 

 bracts. The best species is C. retorta, which has a unique 

 appearance in the garden, and is strongly recommended 

 for more general cultivation. It is a hardy annual of 

 easy culture. For a garden review of the other Honey- 

 worts, see Gn. 41, p. 212. 



retdrta, Sibth. & Sm. HONEYWORT. Fig. 415. Height 

 l%-2 ft. : Ivs. glaucous, often spotted white or red ; 

 lower Ivs. obovate-spatulate ; upper Ivs. amplexicaul, 

 with 2 round ears, on the flowering branches gradually 

 becoming smaller and closer together until they pass into 

 purple bracts, which form the chief attractive feature of 

 the plant : fls. when full-blown protruded beyond the 

 bracts : corolla tubular-club-shaped, yellow, tipped pur- 

 ple, with 5 small, spreading teeth. Greece. B.M. 5264. 

 Gn. 41:847. W. M. 



CEROPEGIA (Greek, wax and fountain, the flowers 

 having a waxy look ) . A sclepiadacece. Greenhouse vines 

 of Africa and Asia, not in the Amer. trade. A dozen spe- 

 cies are known in Old World collections. Many of them 

 have tuberous roots, and need a season of rest and dry- 

 ness. Prop, by cuttings. Odd and handsome. 



