180 



CONTKlBUTlONrt FKoM THK NATIONAL HKKHAUM'M. 



coiiiicctioii. Stylopodiimi wiuitiii<i'. Oil tiilx's vcit small, 4 to S in 

 the iiilci'vuls (sojitiirv in C iilohnxn.^), S to 1+ on the fomiiiissunii .side 

 ("l in ('. (//o/tiMi/.s). Svvd wvy Hat, with i>lant' face. 



Dwarf a(aiil('s<'(Mit xcropiiN tie plants, with small pinnate or hipin 

 nate leaves, no involiuTo (except occasionally in ('. /'rnif/rr/iuul 

 ('. ii> H^hrri'iji)^ usually t'oliaceous and conspicuous involucels, and whiti' 

 or yellow llowers. 



Type six'cies, SiHnain <i>'t(iilf I'ursh, Fl. 2: Su|)pl. T^Vi. 1S14. 



A ^(MMis of 7 sp»'ci(>s helonyinj;' to the arid regions of western rniteil 

 States, a sinj^le species extendinj,^ int(» Canada. 



Tlu' type iif the jreiiiw is ('. itrai(lin {Siliiiiini untiilf I'lirsh), l>iit cvciiUiiilly it wii- 

 made to iiicludt' an iiKKi't'^'ut*' of sin-cii'S very (liffiTciil Inmi lliiw tyi'r. In mir 

 Ut'vi(<ioii the jrciuis ('iilii/ilini wiiH (•stiil)lislit'(l to iiiclmlc '""riiis tlmt coiilil not 1m' uh^^p 

 cialcil witli ('i/iiiiii'ti I iin t\>i ;tciuTally iiiultTstooil. IaUi- Sir. Marcus !•',. .loiics calli'il 

 attention to the fact that certain Hpecit'H rotHine<l in C'l/inujilcniK laid the cswential 



Fni. •">;!.— Cyinoptcnis jmrryi: u. < ti; h, ■■ H. 



ciiaractcrH of ('oUiplitu, and a iccxaniination of old and new material liiw led lis to 

 tlie iliscovery tliat ('iiliijilirii represents tlr,' real ;;eniiH ' '»/»/«/y^';w( ; as estahlislied I'V 

 KaUiH'siiue. Accordiniily, the species of Culitptcrn and certain species of Ci/moiitci'i^ 

 are herein set ai)art under the jreiius < ^/moptcniH aH established, ami the other Hjiecics 

 of ('iiiiio/itrriiK, those which have heen commonly taken to represi'iit tiie jjeniis, arc 

 otherwise dispose<l of. 



The jfenus, as hert' set forth, apinnirs to l)e a very natural one. The forms :ill 

 a)pear acaulescent, .so far a.M the aerial habit is concerned, the cluster of leaves ainl 

 llowerinn stems forming a rosette which seems to Ix! usually ])rostrate. H(Mieath tl'C 

 surface the rosette arises from asit-nder stem wiiich is nioreor icsselonj^aled, depi'pl- 

 ent upon the depth of the eloiij.'ated and thick root. The whole strueturG is stronjrly 

 xeroi)bytic, the jilants jxrowin^; in dry, sandy, or j^ravelU' soil. 



The s])ecies are also remarkalily re.strictetl in range, lieinjj coiillned to the and 

 regions of New Mexico, Arizona, (^olorado, Utah, and Nevada, with the single 

 exception of ('. (tninlix, \\w tyiH) of the genus, which ha.s an extensive northern and 

 eastern range. 



The leaf habit is quite uniform, tlie blades Iwing in various states of pinnate 

 division l>etween pimply pinnate and almost thrice pinnate, so that such terms :is 



lli^iii 



