ECIIIXOCACTUS 



23. Echidne, DC. {f. r.nulr, , r,ji. Leni.). Dc-pressed- 

 globose, 5-1 in. Ill di;i]ii.,:(-4 in. Iiit,-h: riljs l.l.afute: 

 radial spine.s 7, broad, rii^id, spii-adiiig, yidlowisli, 1 in. 

 or more long; ceiifral spiin- solitary and 'si-arcely long-t-r 

 than the others: Howers iirlKht vellow, 1 in. or more 

 long. Mexico. 



2t. Textosis, Hopf. Mostly depressed (sometimes 

 gl(.liose), S-12 in. in diani., i-ti in. high, simple: ribs 

 mostly 21 (sometimes 27, and in smaller specimens IM 

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

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

 ish or curved, une(iual, I., to four-tiftlis in. long in some 

 cases, one and one-tifth to 2 in. in others, much shorter 

 than the solitary and stout recurved cintial, which is 

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

 tifth in. long, parti-colored (scarlet an. I ..range bel.nv 

 t.. white above). Texas and uortheasteru Mexico. 



2.'). fimoryi, Engelm., var. rectispinus, Engelm. Fig. 

 74.J. Globose, at length cylindrical: ribs l:!-21, obtuse 

 and strongly tuberculafe : radial spines 7-U, very unequal, 

 the :! upper ones 4-.i in. long, the lower i;.j-:! in. long 

 and iniler; the central very long (12-i:i in.), straight or 

 slightly decurve.l. Southwestern United States and 

 imrthern Mexico. 



2G. reciirvus, Liidict (">tto. Rnb:.d..bose an. 1 verv stout : 

 ribs about 1.5, covereil with l.r..ad. .lark r.'.l spin. -s, the 

 radials spreading, the central ..ne recurve. 1 an. I very 

 stout. Mexico ( f ). 



27. setispintis, Engelm. Subglobose, 2 fo thn-e and 

 one-tifth in. in ili;ini.: ribs l:i,"ni..re or l.-ss olili.pie, 

 often undulate or somewhat interrupted: radial spines 

 14-16, setiform and H.'xiVde, two-lifths to f.iur-tittbs in. 

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

 lowish brown, the laterals white; central siiin.'s i-3. 

 setiform and flexuous, dark, 1 to one ami .no' tifth in. 

 long: flowers fnnneltorm, one and three-tifths to I! in. 

 long, yellow, scarlet within. Texas and Mexic... 



28. hel6phoru3, Lem. Depressed globose, light green, 

 with purple-red veins: ribs ab.nit 20, compresse.l, ob- 

 tuse: radial spines 9-12, \"ery sb.ut and ]iorre<'t; central 

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

 gray. Mexico. 



ei'.'. J,'ihs rJO or man:. 



29. obvallatus, DC. ob.ivate-globose, depressed : ribs 

 very numerous, vertical: spines most abundant towards 

 the apex, unequal, spn-adini;-, st.jut, whitish; the H up- 

 per radials ami solitary ccinr;d strong, the otliers (espe 

 cially the lowest) small : flowers purple, with whitish 

 margin. Mexico. — The luime was suggesteil by the ap- 

 jH-arance of the terminal clu>ter of flowers surr.iunde<l 

 by a f('rtif]cation of str.uig spines. 



311. crispatus, DC. ( A', i/rr/./.ii.s. Link), (ll.ibose, 5 in. 

 ttv more high: ribs 3(I-G0, coin|n-essed ami sharp, more 

 or less undulate-crispe.l : spines 7-11, widely s]n-eading, 

 more or less flattened, the upper larger and brown at 

 tip, the lower shorter and white, or all of them lu'own : 

 flowers purple, or white with purple stripes. Mexic.j 

 and Central America. 



.:'(•.■("'. Tnherrtfhitf . r/,s' h\ JIam iti illnri'i . 



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

 gray: ribs deeply tuberculate, giving the appearance of 

 a Mammillaria, with hexagonal tubercles: radial spines 

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

 longer; all the spines annulate, reddish brt.wn: flowers 

 white, tinted with rose. Mexico. 



32. lopothele, Salm-Dyck. Globose, strongly tubercu- 

 late, after the manner of Mammillaria: tubercles .;iua.l- 

 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. 



EBB, Central spine.^ 4 {3 or o in Silcri n ml smnctiiHes 



d ill iSccj-i'i ) . 



c. I?ihs iess than 1.^,. 



33. robiistus, 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, l>2-3 in. long: flow- 

 ers golden yellow. iMexieo, 



ECHIXOCACTL'S 



515 



34. Ottdnis, Link & Otto. Depresse.l-globose or ovate, 

 3-4 in. high: ribs 10-12, obtuse: radial spines 10-18, 

 slender, yellowish, more or less straight and spreading, 

 about K 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, IS— t in. in 

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

 and obtuse, compressed, tuberculate-interrnpted : lower 

 radnils an.l centrals variegated reil and white; radials 

 y-li, spreailing and recurved, slemler an.l rather rigid, 

 the lowest one 'o-l in. long, the hit.-rals 1-2 in. long 

 and about e.iualing the 2-4 flat Ih-xnous ashy upper 

 ones; centrals 4, flat and flexuous, 1 \,-3 in. hjng, 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 i\lexico. 



cc. Eihs lJ-37. 



30. orthacinthus, Link & Otto, {E. flnvorlrenx, 

 Scheidw.l. Gloliose, yellowish gn-.'n: ribs 12 or 13, 

 vertical, acute: radial spines 14, uio-qual. straight an.l 

 spreading; central spines 4, str.uig.T. the i.iwest the 

 largest; all the spines rigid, annulate, and grayish 

 white. I\lexic..i. 



37. intertSxtus, Engelm. Ovate-globose, 1-4 in. high: 

 ribs 1.'!, acut.-, somewhat oldbju.-, tuberculate-inter- 

 ruide.l, th.' tubercles with a woolly groove ; spines 

 sh.irt an.l rigid, reddish from a whitish base and with 

 tluskv'tips; ra.lial 16-25, closel}' a]tpressed and inter- 

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

 one-tifth to ^2 in. long, the laterals more rigid and a 





746. Echinocactus myriostigma. 



little lunger, the lowest stout and siiiu-t, a little re- 

 curved; Centrals 4. tlie 3 upper ones turnt-d upward and 

 exceeding tin- radiaN and interwoven witli them, the 

 lower one v»-ry .short, stout and porrct: tlowers about 

 1 in, long and wide, ]'urplish. Te.xas and northern 

 3Iexico. 



38. Crcuttii, Engelm. Cylindrical, 2-3?^ ft. high, 1 ft. 

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

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

 tremely variable, angled to tlat, H~3 in. wide; radials 

 11-13, unequal, lowest and several laterals thinnest; cen- 

 trals 4: liowers about 2 in. long, deep crimson in center, 

 bordered by light greenish yeUow. Lower California. 



39. J6hiisoili, Parry. Oval. 4-G in. high : ribs 17-21, 

 low. rounded, tuberculately interrupted, close set, often 

 ol.dique, densely ct:)vered with stout ish reddish gray 

 spines: radial spines 10-14. three-tifths to one and one- 

 third in. long, the upper longest; centrals 4, stouter, 

 recurved, about Po in. long: tlowers 2 to two and three- 

 fifths in. long and wide, from di.-ep red tct pink. Ctah, 

 Nevada, California. 



40. polycephalus, Engelm. & Bigel. Globose (G-10 in. 

 in diatn. ] to uvate ( 10-1(1 in. high. .^-10 in. in diam.) and 

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



