ECHINOCEREU! 



Var. conoideus, Eugelm. lErhinocereus conoideits, 

 Riimpl. Cereus conoideus, Engelm.). Central spine 

 long and robust : fls. large, red. Southern Calif, and 

 northwest Mex. 



18. polyac&nthns, Engelm. (Cereits polyacdntlnis, 

 Engelm.). Stems clustert-d, fniniing tliick masses, cy- 

 lindrical to ellipsoidal: ril.- '.i-l.i : la.lial spines 8-12, 

 robust, subulate, stiff and v1kii]i. mi.l. r "iif the longest, 

 nearly 1 In., upper ones s.;,n-.ly ' ■. in., white to red- 

 dish gray with dark tips : r, ntral- :;-t, Inilbose base, 

 stronger, about the length "t tli' railiaU "i- the lowest 

 sometimes reaching 2 ii... li"riir,.|.,, .-1 ; later all the 

 spines become grav: fls. lati lal. al. mt I '4-"-'4 in. long, 

 dark scarlet to blood-red: fr. spin riral, al.ont 1 in. long, 

 greenish red, spiny. Tex. to Calif, and northern Mex. 



19. 4cifer, Lem. {Cereiis dcifer. Otto). Stems 

 thickly clustered, 0-8 in. high by lK-2 in. in diam., 

 becoming grav and c.rky with age : ribs 9-11, usually 

 10: radial ^|iin.- ii-iiall> il, spreading, under pair long- 

 est, abi.ut ' ,. )ii.. Ill i.iin'ig growth white, later horn-col- 

 ored to -ia\. 111.- n]i|ii 1- lines brownish; central soli- 

 tary, strai:;lit, ]"iiriri. at first ruby red, later brown, 1 

 in. long: fls. lateral. 2 in. and more long, clear scarlet- 

 red, with a yellow throat and sometimes a carmine bor- 

 der. Northern Mex. 



BBB. Bibs of stem IS or more. 



20. chlorAnthus, Eiimpl. {Cereus clilordnihus, 

 Engelm.). Fig. 747. Stems in small clusters, cylindri- 

 cal, slightly tapering above, 4-9 in. high by 2-2}4 in. in 

 diam. : ribs 13-18, straight or rarely spiral : radial 

 spines 12-20, horizontally spreading and appressed, 

 sharp, the shortest one about %in. long and %vhite, the 

 lower laterals a little longer and have purple tips; cen- 

 trals 3-5, or in young pLints absent, bulbose at the base, 

 the upper ones shortest, about the length of the radials, 

 and darker colored, with purplish tips, the lower ones 

 stouter, about 1 in. long, deflexed, white: frequently all 

 the spines are white: fls. lateral, little more than 1 in. 

 long: ovary and tube white bristly; petals green : fr. 

 ellipsoidal, about J^in. long, spiny. Texas and New 

 Mexico. 



21. viridiSldrus, Engelm. (Cerena viridiflM-iis, 

 Engelm.). Stems solitary or onlv in age forming -imall, 

 loose clusters, cylindrical "i- .•l.mi.'ai. ,| , lli|,v,,iiial. :;-7 

 in. high by 1-2 in. in diam.: iil.-l,;: i iHiial -piii.- IJ- 

 18, horizontally radiate, pirtinat.-. -irai^lit .-r -om. v> liat 

 curved, subulate, the lower lati ral-; tin- JMiiizi-^r. aln.iit 

 ^ in., translucent ruby red, the others white ; centrals 

 usually absent, rarely 1, strong, about % in. long, 

 curved upward, red with brown point: fls. lateral, from 

 just below the crown, broad funnel-form, little more 

 than 1 in. long: ovary and tube spiny: corolla green, with 

 a broad darker olive green to pink stripe down the mid- 

 dle of each petal : fr. ellipsoidal, about }4 in. long, 

 gr«enish. Wyo. and Kans. to Tex. and New Mex. 



22. dasyac^nthus, Engelm. {Cereus dasi/acdnthus, 

 Engelm.). Stems solitary or sometimes forming open 

 clusters, ellipsoidal to short cylindrical: ribs 15-21, 

 straight or sometimes slightly spiral, obtuse : radial 

 spines 20-30. straight or sometimes sliErlitly curved, 

 subulate, stiff, sharp, pectinate, wliit.- witii ml or 

 brown tips, later gray, the laterals ].iii-'~'. 'I in., the 

 upper ones shortest, about % in., tli.i-r mI nm riuster 

 interlocking with those of the adjaci-nt cliiNtcr^ : ..ntrals 

 3-8, the lower one longest, white witli colured tips, 

 mostly with bulbose bases: fls. from near the crown of 

 the stem, large, 2/^-3 in. long: ovary and short tube 

 covered with white, reddish tipped stiff bristles ; co- 

 rolla yellow: fr. 1-lK in. long, ellipsoidal, spiny, green 

 to reddish. Tex. 



23. ctenoldes, Lem. {Cereus ctenoldes, Engelm.). 

 Stems solitary or rarely branching, cylindrical to elon- 

 gated ovoid, reaching a height of 6 in. and a diam. of 

 2H in.: ribs 15-16, usually straight : radial spines 13- 

 22, horizontally radiate, pectinate, subulate, bases bul- 

 bose and laterally compressed, stiff, straight or often 

 slightly curved, the laterals longest and about % in., 

 the upper ones very short, white or sometimes with 

 brownish tips ; centrals 2-3 or rarely 4, superposed, 

 coarser, bulbose at the base, short and conical to % in. 

 long, reddish ; later all the spines are gray: fls. lateral, 



ECHINOCYSTIS 



519 



central usuallv ab- 



from near the crown, 2K-3 in. long: ovary and short 

 tube white bristly: corolla yellow, with greenish throat. 

 Tex. and northern Mex. 



24. pectinituB, Engelm. {Cereus pecfitiAtus, 

 Engelm.). Clustered stems evlindrical or ovoid, reach- 

 ing a height of 10 in. by 3 in. diam.: ribs 13-23, 

 straight: radial spines l()-30, pectinate, horizontally 

 spreading and appressed, straight or curved, the laterals 

 longest, round, hardly -'^in 



perposed. wlilli , -. ,1|, m- .■iml li.i-. - \:,ri,,ii-li c,i!,,r..,l 



lateral, from n. :•■'.. ■• ■ , .' ;:■,:.-.: . ■. : ' ni- 

 berculate ami ^i'in\ , li^hi i" '\:n-k v^'-< umI <.f ijri'ly 

 white: fr. globose, spiny, green to reddish green. Mex. 



Var. adiistus, K. Sch. {Cereus adtistus, 'Engelm.). 

 Like the type, but with black-brown to chestnut-brown 

 spines. Mex. 



Var. rigidlssimus, Engelm. {Cereus cdndicans, 

 Hort. C.riijidissimus, Hort.). Rainbow Cactus. Fig. 

 748. Stems comparatively shorter and thicker: radial 

 spines 16-20, coarser and stiffer, straight or very little 

 curved; base thickened, white, yellow or red to brown. 



IP 



these colors commonly ananged m alternating bands 

 around the plant, the spines of adjacent clusters inter 

 locking, centrals absent T(\ to \riz ind noithem 

 Mex 



\ ar caespitosus 1 ~ i / < 



Engelm ( , u , I I II 



curved (1 a « Int I 



Mex 



Var rufisplnus, K Sch Of more robust growth ra 

 dial spines curved, red Mex 



Horticultural names uniileiitihed B polveephalus —E 

 santiutneiis —E lehii—E I'-ininkii—E jiaucupina no 

 doubt a mutdition of paucibpmu^ —E Si-hhiu=E Stheen ^ 

 C H Thompsov 



ECHINOCtSTIS {(,■>., k lull 



with weak pm kh 

 children who Lit 

 quickest growinc 

 in hiding nn-.i_t 

 shrubberT i _ 1 1 

 gourd famil 



\\ 1 



plant the 



