2364 



OPUNTIA 



OPUNTIA 



34. vestita, Salm-Dyck. A small, upright, numerously 

 branched, ramifying plant a foot or more in height: 

 joints rather short, 1-2 in. long and half as thick, usu- 

 ally dark green: areoles with white to grayish wool and 

 a number of long, rather soft, grayish white hairs; 

 spines 4-8, either short, flexible and grayish yellow or 

 four times as long (^-^in.), stiff and red: fls. 1-1 H in- 

 wide, mostly lateral, dark red: fr. ellipsoidal, K~M m - 

 long, bright red and covered with grayish wool. Bolivia. 



35. clavarioides, Link. & Otto. A low, numerously 

 branched, spreading plant, 1-1 K ft- high: joints rather 

 fragile and slender, Kin. thick, cylindrical or somewhat 

 clavate, frequently cristate, with numerous terminal, 

 slender branches: Ivs. extremely small: areoles close 

 together, small, with white wool: spines 4-10, some- 

 times fewer, very small and appressed, white, : fls. 1-1 K 

 in, wide and twice as long, greenish red: fr. elliptical, 

 3^-^in. long; seeds with woolly hairs. Chile. Var. 

 cristata is offered. 



36. Salmiana, Farm. A numerously branched, 

 upright plant, about 3 ft. high, with very long, propor- 

 tionately slender branches: sts. about %in. diam., with 

 rough, fissured or cracked, grayish brown or lead- 

 colored bark, the terminal joints pencil-like, 3-10 in. 

 long and M~Kin. wide: areoles on young growth with 

 sparse white wool and few bristles, on older growth the 

 bristles are very numerous and somewhat spine-like; 

 spines 3-5, spreading, about Min. long, grayish: fls. 1 

 in. wide, red: fr. pyriform, 1-1 J^ in. long, scarlet-pro- 

 liferous, rarely fertile. Brazil. 



37. Darwinii, Hensl. A small, numerously jointed, 

 prostrate, ramifying plant a few inches high: joints 

 globose to broadly obovate, l l /% in. greatest diam., 

 olive-green: areoles with yellowish wool and few bristles; 

 spines rigid, \ 1 A~2 in. long, the lower ones shorter and 

 darker: fls. only on top of terminal joints, 1-1 K in. wide, 

 yellow; ovaries as large as the joints. S. S. Arner. 



38. diademata, Lena. (0. papyracdntha, Phil.). A 

 low, moderately branched, spreading plant, rarely more 

 than 4 in. high and forming dense patches several feet 

 diam.: joints 1-1 ^ in. long and nearly as thick, glo- 

 bose to broadly clavate, usually growing several in suc- 

 cession, one above the other, young growth bright 

 green, soon becoming grayish: areoles with abundant 



white wool and brownish 

 black bristles; spines 1-2, 

 papery, flexible, white or 

 brownish with darker tips, 

 H (?) in. long, and half as 

 wide: fls. rather small, pale 

 yellow. Argentina. R.B. 40, 

 p. 186. 



39. pulcheUa, Engelm. A 

 small, spreading, numerously 

 branched plant, seldom more 

 than 6 in. high : joints ascend- 

 ing, 2K in. long and ^in. 

 thick, obovate to clavate: 

 areoles crowded, with white 

 wool, and yellowish bristles 

 which become more numer- 

 ous and larger with age; 

 spines 10-15, of variable 

 length, the central one flat- 

 tened, flexible, somewhat 

 papery, 1 in. long: fls. from 

 the top of the joints, purplish 

 to rose-red, 1-1 ^ in. wide: 

 fr. broadly clavate, 1 in. long, 

 with long, hair-like, flexible 

 white spines, dry. Nev., 

 Ariz. 



40. clavata, Engelm. Fig. 

 2605. Opuntia clavata. 2605 (adapted from Pacific 



2606. Opuntia 



acanthocarpa. 

 No. 46. 



R. R. Report). A low, spreading plant, 4-6 in. high, 

 forming dense mats of ascending joints 4-5 ft. diam. : 

 joints 1-3 in. long and 1 in. thick, armed with numer- 

 ous short, flat spines: areoles with white wool and 

 rigid, white bristles; exterior spines 6-14, white, J^-% 

 in. long, interior 4-7, 

 larger, flattened, 

 scabrous and %-l % 

 in. long, one of the 

 central spines usu- 

 ally very broad: fls. 

 yellow, \]/2 in. wide: 

 fr. long-clavate, yel- 

 lowish, dry, 1^-1^2 

 in. long, armed with 

 many white radiating 

 bristles. Nev., New 

 Mex. 



41. Grahamii, 

 Engelm. A low, 

 spreading plant 4-8 

 in. high, with thick, 

 fusiform roots: joints 

 2-3 in. long and ^in. 

 thick, armed with 

 long, dark spines, 

 bright green: areoles 

 with white wool and 

 numerous long, yel- 

 lowish brown, 

 rigid bristles 

 which become 

 very conspicu- 



ous on old 

 joints; exterior 

 spines 4-8, 

 Hin. long, in- 

 terior 4-7, more 

 rigid and longer (1^-2 in.), reddish to ashy brown: fls. 

 yellow, 1^-2 in. wide: fr. ellipsoidal, 1J^-1% in. long 

 and half as wide, armed with many large, radiating 

 spine-like bristles. New Mex., Texas. 



42. Sch6ttii, Engelm. A wide-spreading, prostrate 

 plant, 4-6 in. high, with numerous short, curved 

 branches: joints short-calvate, rarely more than 2 in. 

 long and armed with numerous dark-colored spines: 

 areoles with white wool and very few bristles; exterior 

 spines 6-10, very variable, Kin. long; interior usually 4, 

 flattened or irregular, 1K~2 in. long, brownish red: 

 fls. greenish yellow to reddish, 1J^ in. wide: fr. short - 

 clavate, the numerous areoles covered with white wool 

 and many short bristles. Texas, Mex. 



43. Emoryi, Engelm. A prostrate and spreading 

 plant with comparatively large, long-clavate, curved 

 joints and reaching a height of 8-12 in.: joints 4-7 in. 

 long and 1-1 K in. thick, with large, elongated tuber- 

 cles: areoles remote, with white wool and a few long 

 (Kin.) yellow bristles; spines numerous, exterior 10-20, 

 Kin. or less long, very bulbous at base; interior 5-10, 

 brownish to reddish black, more or less flattened and 

 sometimes 3 in. long: fls. yellow, reddish within, lJ-^-2 

 in. wide: fr. ellipsoidal, yellow, 2-2 K in. long and 1 in. 

 wide, armed with numerous bristles and spines. S. W. 

 U. S., N. Mex. 



44. invicta, Brandegee. A numerously branched, 

 spreading plant, 10-14 in. high, bluish green and armed 

 with many rigid, erect spines: joints 4-6 in. long and 

 2-2 K in. thick, nearly cylindrical: areoles with whitish 

 wool and yellowish red bristles; spines 15-25, exterior 

 6^-12, Kin. or less long; interior 10-15, very strong and 

 rigid, 1-2 in. long, more or less flattened: fls. yellow, 

 1K~2 in. wide: fr. broadly obovate, dry, armed with 

 numerous reddish spines and bristles. Low. Calif. 



45. Davisii, Engelm. & Bigel. A procumbent, spread- 

 ing shrub, with firm, woody skeleton, 1-2 ft. high: 



