CEREUS 



curly hair, about Kin. long, in new growth: radial spines 

 5-7 and a solitary central one, uniform, about %-5^in. 

 long, amber color to brown and finally gray : lis. from the 

 older growth, large, about 8 in. long, slightly curved, 

 white, nocturnal. Uruguay, Brazil, Columbia. B.M.4084. 

 — C. grandis, Haw., according to Dr. Weber, is but a 

 larger form of this species. 



43. prinoeps, PfeifiE. ( O. Baxaniinsis, Karw. C. varid- 

 6i7js, Engelm.). Erect, 3-10 ft. high, 2 in. in diam., and 

 3- or 4-angled : spines 4-6, stout and radiant, unequal, the 

 larger l-lKin. long: fls. white, long-tubular, 7-8 in. long: 

 fr. oval, spiny, 2-3 in. long, scarlet, and with luscious red 

 pulp. Lower Rio Grande, on Mex. side.— The young 

 shoots are said to have 8 ribs and more numerous slen- 

 der spines, and in cultivated forms the spines are often 

 much longer than given above. 



44. Bdnplandii, Farm. Stems at first upright, later 

 clambering over rocks and bushes, about 1-lJ^in. in 

 diam., branching and spreading, in new growth com- 

 monly of a bluish or purplish green, later gray-green : 

 ribs 4-6, sharp, compressed, crenate, separated by broad, 

 concave faces; later the ribs become much depressed, so 

 that the stem is sometimes nearly cylindrical ; the ribs 

 commonly run spirally around the axis of the stem : 

 areolae X-lKin. apart, at first considerably depressed, 

 later shallower, white, becoming gray : radial spines 

 4-6 (later 1^ more appear), straight, spreading, the 

 largest about K-1 in., stout, subulate, pointed, the under 

 one needle form and shorter ; central solitary, straight, 

 stronger, 1 in. long, deflexed or porrect ; the stronger 

 spines are white, with tips and bases brown, when young 

 beautiful ruby-red, later all are gray, with black tips and 

 bulbous bases: fls. from the lateral areolas, about 10 in. 

 long, white, nocturnal : fr. nearly spherical, about 2 in. 

 in diam., mammate, dark carmine-red. Paraguay, Brazil, 

 and Argentine Republic. 



45. tortudsus, Forbes (O. atropurpfiretis, Haage). 

 Stems slender, weak, at first upright, but later reflexed, 

 reaching a length of 3^ ft., and 1-lKin. in diam. : ribs 

 commonly 7, sometimes but 5, rounded, low, separated by 

 regular serpentine grooves : areolse about 1 in. apart, 

 large : radial spines 5-8, about %-l in. long: centrals 1-4, 

 about %-lWva. long ; all the spines slender, rigid, red- 

 brown when young, becoming ashy with age : fls. from 

 the previous year's growth, about 6 in. in length, trum- 

 pet-shaped, tube olive,- green and 

 spiny, in the axils of the reddish 

 green scales ; oiiter petals pale green, 

 tinted with brown ; inner petals 

 clear white : fr. spherical, bril- 

 liant red without and white within, 

 mammate, bearing a few spines on 

 the summits of the lower mammas. 

 Argentine Republic. 



46. Martinii, Lab. (C. monacdn- 

 thus, Hort. ). At first upright, later 

 requiring a support; freely branch- 

 ing from the base, branches long, 

 reaching nearly 5 ft., %-l in. in diam., 

 slightly tapering, dark green: ribs 

 5-6, separated by serpentine grooves, 

 contracted between the areola?; some- 

 times the ribs are not evident, when 

 the stem is cylindrical : areolae about 

 1-lK in. apart, white : radial spines 

 5-7, reddish, short, bristle-form, with 

 bulbous bases or short conical, usu- 

 ally about % in. long ; central soli- 

 tary, mostly defiexed, K-1 in. long 

 (in yoimg growth, frequently not 

 longer than the radial), subulate, 

 robust, light brown or white, with 

 bases and tips black : fls. from the 

 older growth stems, 8-9 in. long, clear white, noc- 

 turnal : fr. spherical (very similar to C. tortuosus), 

 pointed, dark carmine-red, about 2 in. in diam., mam- 

 mate, a few spines on the mammas, toward the base 

 of the fr. Argentine Republic. R. H. 1860, pp. 658-9. 

 —This species is commonly sold under the name of 

 C. platygonus. 



CEREUS 



283 



AAAAA. Stems more or less climbing, attaching them- 

 selves to trees, walls, etc., by means of aerial 

 roots. 



B. Hibs of stem 5 or more. 



47. Slagellifdrmis, Mill. Rat-tail Cactus. Creeping 

 or pendent, slender and very branching, cylindrical, 

 M-1 in. in diam. , branches 1 ft. long or more : ribs 10-12, 

 tuberculate : spines short, rather rigid ; radials 8-12, 

 reddish brown ; centrals .3 or 4, brown, with golden tip: 

 fls. funnel-form, crimson, 2-3 in. long : fr. globose, 

 i4m. in diam., reddish and bristly, the pulp greenish 

 yellow ("with the taste of a prune"). W. Ind., Mex., 

 Cent. Amer., S. Amer.— This is commonly hybridized 

 with other species. It is a very common window plant. 



Var. Wptophis, K. Sch. {C. Uptophis, DC). Of more 

 handsome appearance : new spines on the growing point 

 carmine-red : ribs at the most 8: fls. somewhat smaller 

 and lighter. 



48. Millisoni, Hort. (C. Smlthii, Lindl.). This is a 

 garden hybrid of C. flagelliformis on C. speciosus. Habit 

 of C. flagelliformis, but stouter : fls. more like those of 

 C. speciosus. B.M. 3822. 



49. Donkelieri, Salm-Dyck. A bushy epiphyte, richly 

 branching, clinging to the bark of trees by aerial roots, 

 commonly in company with orchids ; branches very 

 long and thin, scarcely %in. in diameter, cylindrical or 

 inconspicuously 6-angled, or rarely 7-8-angled : areolse 

 very close together, small, white : spines 10-15, very 

 short, snow-white ; sometimes 2-3 short, stronger 

 spines appear in the center of each cluster : fls. resem- 

 bling those of G. grandiflonis. Brazil. 



50. grandifldrus. Mill. Fragkant Night-blooming 

 Ceeeus. Fig. 414. Diffusely creeping, with very long 

 and flexuous climbing 5-7-angled branches, %-l in. in 

 diam., with bunches of white bristles associated with the 

 5-12 short spines : fls. white and fragrant, 6-8 in. broad. 

 W. Ind., Mex. B.M. 3381. — Long cultivated in gardens as 

 the "Night-blooming Cereus," and made to vary widely. 

 C. Uranos, Hort., is but a form of this species. 



51. M&ynardii, hem.iC. grandifldrus,yaT. Mdynardii, 

 Hort.). A garden hybrid of O. grandiflorus on 0. spe- 

 ciosus. Habit of O. grandiflorus, but red colors of C 

 speciosus. 



414. Cereus grandiflorus, one of the night-blooming; Cereuses (X M)- 



52. spinuldBUS, DC. Stems slender, climbing, reach- 

 ing a height of 8-10 ft., %-l in. in diam. , branches more 

 slender : ribs commonly 5, sometimes 6, sharp, becom- 

 ing obliterated with age ; areolse small, about Kin. 

 apart : radial spines about 8, very short, bristle-form, 

 brown, becoming gray ; central solitary, somewhat 

 longer ; fls. 5-6 in. long by 3-4 in. in diam.,wMte, flushed 



