LOASA FAMILY 575 



bf!«;ts lanccoliiU', cnmnUf. mtptiU liti(*:ir, 'i mm. Uinii, twi<'<; Jis lori^f iw the liypan- 

 tliium; fK*tul« y<;ll<jwi«l), auyut 1 cfn. lon^, lonj^-cluwcd; bl:jKl<;s HpatulaUj. Ihim-.ti 

 region: h Lttth. L. ,Sfm. 



Familv 88, CACTACEAE. Cactuh Famii-v. 



tSucculcnt shrubby phmtH, uwuully Kpiny, the Hpifuts urmnn^ from smull 

 hniry or brixtly cuHhiotU5(ur(»«Uu»); Uiavcs UKUully watitit»K, if [)n^sc»rlt, in ours 

 Hffiall Hii'l (J(;(;i<]iiou?i. Flowcrn fx'rfcfct, in ours rcj^ulur, Hc^litary. Ilypun- 

 thiurn w(;ll dcjvelopt;*!, (;n(;lo!iinj4 tlu; ovury, tScjjwlH usually many, imbricaU;, 

 the imutr often fKjtail-likt;. i'etab many, in two or more mr'ui». Stamuns 

 num<,'roUH, in w.'veral »tTi«?K. Gynoccrium of !4<;vc;ral nnil,<'<l carpels; ovary 

 inferior, l-ecilled, wiU» wiveral jKiric^tal lAiiwiiUw.. I-'niit a fleshy or rather 

 dry berry, 



lAi^vw «;vl<J<mt, but attmll and dwrUluoax; ttowtim without «J«rtnlt« tulx;; aoMtla with a 



horiy iull; i*t«frw joIt»t<xl. 1. Ol't'NnA. 



Ltjsivts* wiiiaitut: flowiTJi wfth a uwre or U»« dcflnlt*; tulw; litnttU wJthout adl; itlciru not 

 c<)f».s»pl'ruou.f>ly JolntwJ. 

 Klow«;r« hc<rn<; rutar the; iphie-heiwJnK arwjiiwi. 



I'lant-h<i<ly irioro or )<«-•> <;yl)fidr(<-; «i*l(ic« arranj<<*d on d<tfh)lt« rUw; Mowers arlishiK 



fr<jfn fiear fully d<;vi;l<<i*<;d ar<^>l;i<;, h<;n<;«; lat<;ral on thi' titwn. 2. i'>lllN<)< KKKIjs. 



I*hint-I)<)dy usually s<loliular or (jllliwold or .-ihort fyl(n<lri<:: fruit not spiny; sl<;ni 



tuh«;r»:l<»il or rll>l><;d, If rn)f«;<J th«; (low<;r!» arl.'»lnj4 near younj{ ary<jla«, 



lwm<;<; n<«irly t<;rfrtlr*ji.l on th<; !»l«m. 



Flow«;r!» lur«(j; fruit <:<>vw»;d with l>ra<rt«s; ««mj<1« smooth, 3, KcnrN'fK'Arrus, 



Klowers wnuUl; fruit riaktid or nearly so; >nnifU roiii<h«m«<l ; sUnrw tul)<;rt;l<yl, 



4. I'K0H*< A«-ri,'H. 

 I'low<;r:i home r«jmot«; from the S|>ine9>, at the hiWKi of the tuherelw of tin; stem. 



5. ("tJKVI'llA.NniA. 

 ]. OPUNTIA Mill * I'lilCKLY 1*KAU, CifOI.I>A, INDIAN VlQ, TUKK CacTUS. 



J'Lesfiy pbnts with w>ri«pi(;uoii>jly j<)inU;d aU'itiH, the joints flat or U;ret«j. 

 lAf.ivi^ w;ule-iike, eiiKlue^nw, Hj>irally urranj^ed. Areohw; axilhiry, usnally Kpino 

 bearins<. l-'lowers bit<;ral, tirmnu. fiom tlie U[)rj<;r part <^f sotne Hpin(;-b<'arins^ 

 ur<;<>lae. Hypanthiiiin b(?arjn!i ar<?ol,-w?, not pnxuK'i'A beyotxl tin; ovary, fSepal« 

 HpreiwiifiK, in several rows. Htyle eyiin<lrie; stiftma r> H-lol)e<l. Ii<;rry more or 

 l<»iH jK?ar-«haf><;d, fl<;«f)y or rather dry, Hoxubi <iisk-like and flutUjrujd, Kinbryo 

 <rurved around the c;ridoKiK;rfn, 



Int<;rno«l<« eyilndrhyil ; !»|;ln<« covered with a delicate sheath. 

 Jnt<;rnod<t«* very fhwhy, tursfld, easily d<*t:w:tijed. 

 Jnt<;rnod<i«i l<«s tUi>>Uy, not <*aslly det:ju<;h<^l. 

 Kult dry; tn'At'bi ani?ular. 

 Fruit )l<^•^^iy; s<^;<ls not a/iKular. 



I'lanUs tall () to .'J fn<;t<;rsj ttli^ii); fhjwers red. 

 J'lanu-i low .and st»re:i.dlns{ (l<«s than I nteter hli<H). 

 !Si)ln<« y<!llow; ft<jw(;rsj ollvfj-i^reen. 

 >ililn««> whlt<;; llowersi yellow. 

 Intern'Kl"^ /lat and hro.ad; spines not covered by a slmath. 

 I'ulvlnl not den.s<;ly woolly. 



Fruit <lry wiinii mature, usually very snjriy, 



Jnt<;rno<l<« very ll<«fty, often terete Tn sefitlon, the t<?nnlnal one <;.i.slly bre;ik- 



hiK lo'>.v). <). (J. fr<iijili:i. 



Int<;rn'<'l<>-j nev<;r teret<; In se<;tl<jn, but alwriys much broa/ler tlmn tlilck. 

 lni.<;rnod<« somewh,at turbid; sp'"'^'* very lonj<, 7, (J. rulHa. 



lntern<><J'^ (lat; spln<^•j »n<i'llum lenj<th. 

 Pijtals norm;jilly yellow, 



Kp!n<« st'^ut, <hirk brownish, 8. O. polt/acantha. 



Hpln<« w«jak, white. i). O. Hchu^eriniana. 



I'etaw red, 



Fllanwints n^l 10, O. rhodanlha. 



Filaments yellow, 11, (). ninlfwme.mrna. 



Fruit juicy, usiwlly nak<'/l <>r ne.arly so, 



lnU;rn<><l<« pubescent, always «plneU«!S, J 2. O. hnaHarU. 



Internodes glabrous. 



InU^rn'i'J'M </fU;n naked or som.etlm<« he-'wlnK lonif, stout sphnjs, 



JnU;rno<l<;s pale, somewluit Klau«;<ius, |;j. O. humifusa. 



Interno<I<« <le<Ji> Kr«}e«. H O dreenei. 



* Key j[>r<;i)ar«Jd by l)r J. S. Itoso. 



