23l>4 



OPUNTIA 



OPUNTIA 



;U. vestita, Salin-Dyck. Asmall, uprisht, niimprously 

 br:vni'lH\l. niiiiifyiii); i>l;int :i foot or more in hoifilit : 

 joints rmluT short. l-'2.in. long and lialf as thiclv, visu- 

 ;illy liark groen: an-olos with white to grayisli wool and 

 :i nuinbor of lonsi, rather soft, grayish while hairs; 

 spines 4-S, eitlier short, flexible and grayish jellow or 

 four times as long (,'2-^4in.), stiff and red: Hs. 1-1 K in. 

 wide, mostly lateral, dark red; fr. ellipsoidal, J^-^^in. 

 long, bright ivd and eovereii with grayish wool. Bolivia. 



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

 bnuiehed. spn>ading plant, 1-1',> ft. high: joints rather 

 frjigile and slender. ' >m. thiek, eylindrieal or somewhat 

 clavato, frequently cristate, with numerous terminal, 

 slender branehes: Ivs. cxtretnely small: areoles close 

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

 times fewer, very small and appressed, white, : fls. 1-1 ' 2 

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

 '..-'lin. long; seeds with woolly hairs. Chile. Var. 

 cristata is otTered. 



36. Salmi^a, Farm. A numerously branched, 

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

 tionately slender branches: sts. about ■^:,m. diam., with 

 rough, fi.ssured or cracked, grayish brown or lead- 

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

 long and 'a-'oin. 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. spreatling, about 'sin. long, grayish: fls. 1 

 in. wiilc, red: fr. pjTiform, 1-1 3i in. long, scarlet-pro- 

 liferous, rarely fertile. Brazil. 



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

 prostrate, ramifying plant a few inches high: joints 

 globo.se to broadly obovate, 1)2 in. greatest diam., 

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

 spines rigid, 1 ? 2-2 in. long, the lower ones shorter and 

 darker: fls. only on top of terminal joints, 1-1^2 in. wide, 

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



38. diademita, Lem. (0. papyracdntha, Phil.). A 

 low, moderately branched, spreading j)lant, rarely more 

 than 4 in. high and forming dense patches several feet 

 diam.: joints 1-1 J 2 in. long and nearly as thiek, glo- 

 bose to broadly clavate, usualh' 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, 

 K CO in. long, and half as 

 wide: fls. rather small, pale 

 yellow. Argentina. R.B. 40, 

 p. 186. 



39. pulchella, Engelm. A 

 small, spreading, numerously 

 branched plant, seldom more 

 than 6 in. high : joints ascend- 

 ing, 2J2 in. long and Hin. 

 thick, obovate to clavate: 

 areoles crowded, with white 

 wool, and yellowish bristles 

 which become more numer- 

 ous and larger with age; 

 .spine.s 10-15, of variable 

 length, the central one flat- 

 t<!ned, flexible, somewhat 

 paperj', 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. Nov., 

 Ariz. 



40. clav^ta, Kngelm. P'ig. 

 2605 (adapted from Pacific 



2606. Opuntia 



acanttiocarpa. 



No. 46. 



>. 



4^ 



2605. Opuntia clavata. 



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



forming dense m.ats 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, while bristles; exterior spines 6-14, white, J^-M 

 in. long, interior 4-7, 



larger, flattened, ■ , 



scabrous and 14-^14 1 ) \l//! 



in. long, one of the I ,1 J .^' 



central spines usu- 

 ally very broad: fls. 

 yellow, 1^2 in. wide: 

 fr. long-clavate, yel- 

 lowi-sh, dry, 1.'4-1''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 Jjin. 

 thick, armed with 

 long, dark spines, 

 bright green: areoles 

 witii white wool and 

 numerous long, yel- 

 lowish brown, 

 rigid bristles 

 which become 

 very conspicu- 

 ous on old 

 joints; exterior 

 spines 4-8, 

 J gin. long, in- 

 terior 4-7, more 

 rigid and longer (1 J2-2 in.), reddish to ashy brown: fls. 

 yellow, 132""2 in. wide: fr. ellipsoidal, l?2-l/4 in. long 

 and half as wide, armed with many large, radiating 

 spine-like bristles. New Mex., Texas. 



42. Schottii, Eiigelm. 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, } 2in. long; interior usually 4, 

 flattened or irregular, l')-^ in. long, brownish red: 

 fls. greenish yellow to reddish, lJ-2 in. wide: fr. shorts 

 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 J ■> in. thick, with large, elongated tuber- 

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

 (J^in.) yellow bristles; spines numerous, exterior 10-20, 

 J^in. 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, 13'2-2 

 in. wide: fr. ellipsoidal, yellow, 2-2J2 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 3l2 in. thick, nearly cylindrical: areoles with whitish 

 wool and yellowish red bristles; spines 1.5-25, exterior 

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

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

 1^2-2 in. wide: fr. broadly obovate, dry, armed with 

 numerous reddish spines and bristles. Low. Calif. 



45. Davisii, Engelm. & Bigel. A [irocumbent, spread- 

 ing shr\ib, wilh firm, woody skeleton, 1-2 ft. high: 



