ECHINOCACTUS 



ECHINOCACTUS 



1091 



mostly 21 (sometimes 27, and in smaller specimens 13 

 or 14) and undulate: spines stout and fasciculate, red- 

 dish, compressed; the exterior 6 or 7 radiant, straight- 

 ish or curved, unequal, K-^in. long in some cases, 

 1K-2 in. in others, much shorter than the solitary and 

 stout recurved central, which is sometimes ^~M m - 

 broad: fls. about Kin. l n g> parti-colored (scarlet and 

 orange below to white above). Texas and N. E. Mex. 



25. rectispinus, Brit. & Rose. Fig. 1372. Globose, 

 at length cylindrical: ribs 13-21, obtuse and strongly 

 tuberculate: radial spines 7-9, very unequal, the 3 

 upper ones 4-5 in. long, the lower 13^-3 in. long and 

 paler; the central very long (12-13 in.), straight or 

 slightly decurved: fls. about !K m - long) pinkish; ovary 

 bearing a few ovate, scarious, naked scales. Low. Calif. 



26. Emoryi, Engelm. Becoming large, globular to 

 cylindrical plants, 1-4 ft. high: ribs 13-21, obtuse: 

 radial spines 7- 



9, nearly equal, 

 stout, 1-2 in. 

 long; central 

 spine single, por- 

 rect, hooked: 

 fls. red, tipped 

 with yellow: fr. 

 1-2 in. long, 

 covered with 

 thin bracts. S. 

 Ariz, and N. 

 Sonora. 



27. recur vus, 

 Link & Otto. 

 Subglobose and 

 very stout: 

 ribs about 15, 

 covered with 

 broad, dark red 

 spines, the ra- 

 dials spreading, 

 the central one 

 recurved and 

 very stout. Mex. 



28. setispinus, 

 Engelm. Sub- 

 globose, 2-3K 

 in. diam. : ribs 

 13, more or less 



1372. Echinocactus rectispinus. No. 25. 



oblique, often undulate or somewhat interrupted: 

 radial spines 14-16, setiform and flexible, K-/^in. long, 

 the uppermost (the longest) and lowest ones yellowish 

 brown, the laterals white; central spines 1-3, setiform 

 and flexuous, dark, 1-1 K in. long: fls. funnelform, 

 1K-3 in. long, yellow, scarlet within. Texas and N. 

 Mex. 



29. helophorus, Lem. Depressed globose, light green 

 with purple-red veins: ribs about 20, compressed, 

 obtuse: radial spines 9-12, very stout and porrect; 

 central spines 1-4, stronger and annulate; all the spines 

 pearl-gray. Mex. 



ccc. Sis. with 80 or more ribs. 



30. obvallatus, DC. Obovate^-globose, depressed: 

 ribs very numerous, vertical: spines most abundant 

 towards the apex, unequal, spreading, stout, whitish; 

 the 3 upper radials and solitary central strong, the 

 others (especially the lowest) small: fls. purple, with 

 whitish margin. Mex. The name was suggested by 

 the appearance of the terminal cluster of fls. surrounded 

 by a fortification of strong spines. 



31. crispatus, DC. (E. drrigens, Link) Globose, 5 in. 

 or more high: ribs 30-60, compressed and sharp, more 

 or less undulate-crisped: spines 7-11, widely spreading, 

 more or less flattened, the upper larger and brown at 

 tip, the lower shorter and white, or all of them brown: 

 fls. purple, or white with purple stripes. Mex. 



cccc. Sis. luberculale, as in Mammillaria. 



32. hexaedr6phorus, Lem. More or less globular, dark 

 gray: ribs deeply tuberculate, giving the appearance of 

 a mammillaria, with hexagonal tubercles : radial spines 

 6 or 7, radiating like a star; central spine solitary, erect, 

 longer; all the spines annulate, reddish brown: fls. 

 white, tinted with rose. Mex. 



33. lopothele, Salm-Dyck. Globose, strongly tuber- 

 culate, after the manner of Mammillaria: tubercles 

 quadrangular, bearing clusters of 5-10, more or less 

 porrect, long, rigid, and equal spines; central solitary or 

 wanting: fls. white or yellowish. Mex. 



BBB. Central spines J+ (2 or 3 in E. Sileri and sometimes 



3 in E. Scopa) . 

 c. Ribs less than 13. 



34. robustus, Otto. Clavate and stout: ribs about 8, 

 compressed, vertical: radial spines about 14, the upper 

 ones slender, the lowest 3 stronger; central spines 4, 

 4-angled at base, transversely striate, the lowest one 

 largest; all the spines purple-red, 1^-3 in. long: fls. 

 golden yellow. Mex. 



35. OttSnis, Link & Otto. Depressed-globose or 

 ovate, 3-4 in. high: ribs 10-12, obtuse: radial spines 

 10-18, slender, yellowish, more or less straight and 

 spreading, about J^m. long; central spines 4, dusky 

 red, stronger, the uppermost very short, the 2 laterals 

 horizontal, the lowest longest (1 in.) and deflexed: 

 fls. lemon-yellow, becoming 2-3 in. diam. Mex. 



36. bicolor, Gal. Globose-ovate, stout, l^i-4 in. 

 diam.. sometimes becoming 8 in. high: ribs 8, oblique 

 and obtuse, compressed, tuberculate-interrupted : lower 

 radials and centrals variegated red and white; radials 

 9-17, spreading and recurved, slender and rather rigid, 

 the lowest one %-l in. long, the laterals 1-2 in. long 

 and about equaling the 2-4 flat flexuous ashy upper 

 ones; centrals 4, flat and flexuous, 1^-3 in. long, the 

 uppermost thin and not longer than the erect and rigid 

 laterals, the lowest very stout, pprrect and very long: 

 fls. funnelform, bright purple, 2-3 in. long. N. Mex. 



cc. Ribs 13-27. 



37. orthacanthus, Link & Otto (E. fiavomrens t 

 Scheidw.). Globose, yellowish green: ribs 12 or 13, 

 vertical, acute: radial spines 14, unequal, straight and 

 spreading; central spines 4, stronger, the lowest the 

 largest; all the spines rigid, annulate, and grayish 

 white. Mex. 



38. intertextus, Engelm. Ovate-globose, 1-4 in. high: 

 ribs 13, acute, somewhat oblique, tuberculate-inter- 

 rupted, the tubercles with a woolly groove: spines 

 short and rigid, reddish from a whitish base and with 

 dusky tips; radial 16-25, closely appressed and inter- 

 woven, the upper 5-9 setaceous and white, straight 

 ^j-^in. long, the laterals more rigid and a little longer, 

 the lowest stout and short, a little recurved; centrals 4, 

 the 3 upper ones turned upward and exceeding the 

 radials and interwoven with them, the lower one very 

 short, stout and porrect: fls. about 1 in. long and wide, 

 purplish. Texas and N. Mex. 



39. Orcuttii, Engelm. Cylindrical, 2-3^ ft. high, 1 

 ft. diam., single or in clusters up to 18 or more, not 

 rarely decumbent: ribs 18-22, often oblique: spines 

 extremely variable, angled to flat, J^-3 in. wide; 

 radials 11-13, unequal, lowest and several laterals 

 thinnest; centrals 4: fls. about 2 in. long, deep crim- 

 son in center, bordered by light greenish yellow. 

 Low. Calif. 



40. Johnsonii, Parry. Oval, 4-6 in. high: ribs 

 17-21, low, rounded, tuberculately interrupted, close 

 set, often oblique, densely covered with stoutish red- 

 dish gray spines: radial spines 10-14, %-lM in. long, 

 the upper longest; centrals 4, stouter, recurved, about 

 \Yt in. long: fls. 2-2% in. long and wide, from deep red 

 to pink. Utah, Nev., Calif. 



