ECHINOCACTUS 



23. Echidne, DC. {E. I'cuideiii'iji, Ijem.). Depressed- 

 globose, 5-7 in. in diam., a-4 in. liigh: ribs 13, acute: 

 radial spines 7, broad, rigid, spreading, yellowish, 1 in. 

 or more long; central spine solitary and scarcely longer 

 than the others: flowers bright yellow, 1 in. or more 

 long. Mexico. 



24. TexSnsis, Hopf. Mostly depressed (sometimes 

 globose), 8-12 in. in diam., 4-6 in. high, simple: ribs 

 mostly 21 (sometimes 27, and in smaller specimens 13 

 or 1t) and undulate: spines stout and fasciculate, red- 

 clMi. c-.uii|.rissiMl; the exterior 6 or 7 radiant, straight- 

 i-li Ml- ,111 v(, I. unequal, yi to four-fifths in. long in some 

 r;i^( s, .mr ;ind one-fifth to 2 in. in others, much shorter 

 tli:in tlii- solitary and stout recurved central, which is 

 sometimes one-sixth to K in. broad: flowers about one- 

 fifth in. long, parti-colored (scarlet and orange below 

 to white above). Texas and northeastern Mexico. 



23. fimoryi, Engelm.. var. rectispinus, Engelm. Pig. 

 745. Globose, at l.n-ili <'vliTi.lrii-iil : ribs 13-21, obtuse 

 and strongly tubfiriil:.!.: i.i.IkiI ^|,iih^ ,-'.>. very unequal, 

 the 3 upper ones I-:, in. Imh-, ihr l,i«-, r l'.S-3 in. long 

 and paler; the central vn-y loni; (lii-i:! in.), straight or 

 slightly decurved. Southwestern United States and 

 northern Mexico. 



26. reciirvus, Link & Otto. Subglobose and very stout: 

 ribs about 15, covered with broad, dark red spines, the 

 radials spreading, the central one recurved and very 

 stout. Mexico (?). 



27. setisplnus, Engelm. Subglobose, 2 to three and 

 one-fifth in. in diara. : ribs 13, more or less oblique, 

 often undulate or somewhat interrupted : radial spines 

 H-I6, setiform and flexible, two-fifths to four-fifths in. 

 long, the uppermost (the longest) and lowest ones yel- 

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

 setiform and flexuous, dark, 1 to one and one-fltth in. 

 long; flowers funnelform, one and three-fifths to 3 in. 

 long, yellow, scarlet within. Texas and Mexico. 



28. heWphorua, Lem. Depressed globose, light green, 

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

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

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

 gray. Mexico. 



ccc. Bibs 30 or more. 



29. obvallitus, DC. Obovate-globose, depressed ; ribs 

 very numerous, vertical ; spines most abundant towards 

 the apex, unequal, spreading, stout, whitish; the 3 up- 

 per radials and solitary central strong, the others (espe 

 daily the lowest) small : flowers purple, with whitish 

 margin. Mexico. — The name was suggested by the ap- 

 pearance of the terminal cluster of flowers surrounded 

 by a fortification of strong spines. 



30. crispitUB, DC. i-E.drri(/ens,h\nk). 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: 

 flowers purple, or white with purple stripes. Mexico 

 and Central America. 



cccc. Tuberculale, as in Mammillaria. 



31. hex8edr6phorus, Lem. More or less globular, dark 

 gray: ribs deeply tuberculate, giving the appearance of 



ECHINOCACTUS 



515 



al tubercles: radial spines 

 :entral spine solitary, erect, 

 te, reddish brown: flowers 



a Mammillaria, with hexag, 

 6 or 7, radiating like a star; 

 longer; all the spines annul 

 white, tinted with rose. Me 



32. lopothdle, Salm-Dyck. 

 late, after the manner of M: 

 rangular, bearing clusters of 5-10, more or less porrect 

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

 ing: flowers white or yellowish. Mexico. 



BBB. Central spines 4 (Z or 3 in Sileri and sometimet 



3 in Scopa). 



c. nibs less than IS. 



33. robtistus, Otto. Clavate and stout: ribs about 8, 

 compressed, vertical: radial spines about 14, the uppei 

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

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

 largest; all the spines purple-red, \\i-3 in. long: flow- 

 ers golden yellow. Mexico. 



34. Ottdnis, 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 H in. long; central spines 4, dusky red, stronger, 

 the uppermost very short, the two laterals horizontal, 

 the lowest longest (1 in.) and deflexed: flowers lemon- 

 yellow, becoming 2-3 in. in diameter. Mexico. 



35. bicolor, Gal. Globose-ovate, stout, \%-A in. in 

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

 and obtuse, compressed, tuberculate-interrupted : lower 

 radials and centrals varitgated red and white; radials 

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

 the lowest one J^-1 in. long, the laterals 1-2 in. long 

 and about equaling the 2-4 flat flexuous ashy upper 

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

 uppermost thin and not longer than the erect and rigid 

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

 flowers funnelform, bright purple, 2-3 in. long. North- 

 ern Mexico. 



CO. Bibs 13-27. 



36. orthacintlius, Link & Otto. (E. flavovh-ens, 

 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. Mexico. 



37. intert^xtus, Engelm. Ovate-globose, 1-4 in. high: 

 ribs 1.!. arut... somewhat oblique, tuberculate-inter- 

 rupted, tile tiilnTcIes with a woolly groove : spines 

 short and riyid. reddish from a whitish base and with 

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

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

 one-fifth to % in. long, the laterals more rigid and a 



746. Echmocactus myriostigma 



little longer, the lowest stout and short, a little re- 

 curved; centrals 4, the 3 upper ones turned upwaid and 

 exceeding the radials and interwoven with them, the 

 lower one very short, stout and porrect: flowers about 

 1 in. long and wide, purplish. Texas and northern 

 Mexico. 



38. 6rcuttil, Engelm. Cylindrical, 2-3J^ ft. high, 1 ft. 

 in diam., single or in .Init, i< up to 18 or more, not 

 rarely decumbent : ri' ' ' '■ m "l.li(|ue: spines ex- 

 tremely variable, an ^ : I :; in. wide; radials 

 11-13, unequal, lowe^ I .mi < .. i.ii i;airals thinnest; cen- 

 trals 4: flowers about :; m. b-n-. 4< i p crimson in center, 

 bordered by light greenish yellnw. Lower California. 



39. Jbhnsonl, Parry. Oval, 4-6 in. high: ribs 17-21, 

 low, rounded, tuberculately interrupted, close set, often 

 oblique, densely covered with stoutish reddish gray 

 spines: radial spines 10-14, tln-ee-tifths to one and one- 

 third in. long, the iii,|'. i- li.iii.'evt ; centrals 4, stouter, 

 recurved, about I'j in. I'ui:: il.iweis 2 to two and three- 

 flfths in. long and wid.-. lr..iii deep red to pink. Utah, 

 Nevada, California. 



40. polyc^phalus, Engelm. & Bigel. Globose (6-10 in. 

 in diam. ) to ovate (10-16 in. high, 5-10 in. in diam.) and 

 cylindrical (reaching 24-28 in. high and about 10 in. in 



