296 Key to the System of 



1344. Pappus longer than the fruit. 



Branched, somewhat beset Vith hairlets ; lower leaves 

 elliptic-cuneate, somewhat indented, the upper narrow 

 and entire; headlets of flowers comparatively small; 

 spinules of the pappus four to eight, short, unequal, 

 barbed. C. lappulacea. 



Pappus shorter than the fruit. 



Branched, somewhat beset with hairlets ; leaves small, 

 mostly elliptic-cuneate, often denticulated ; headlets of 

 flowers minute ; spinules of the pappus six to eight, 

 exceedingly short, barbed. C, niicrocephala. 



1345. Expansions of the marginal corollas minute. 



Annual, dwarf or prostrate, much beset with short rigid 

 hairlets ; leaves small, from obovate- to lanceolar-cuneate, 

 entire or at the summit indented ; headlets of flowers 

 small, on short stalks or almost sessile ; spinules of the 

 pappus four to eight, very short and thin, barbed, mostly 

 alternating with cleft scales. C. hispichila. 



Expansions of the marginal corollas conspicuous ... 1346 



1346. Fruits beset with cottony vestiture. 



Annual ; leaves from elliptic- to lanceolar-cuneate, entire 

 or somewhat denticulated ; headlets of flowers small ; 

 expansions of the marginal flowers violet or white ; 

 pappus of several or numerous minute capillary barbed 

 bristlets. C. plumulifera. 



Fruits except their spinules glabrous ... ... 1347 



1347. Leaves entire or indented. 



Almost glabrous; off-shoots rooting; leaves nearly all 

 radical, in tufts, from linear to narrow-lanceolar, entire 

 or somewhat denticulated; headlets of flowers small, 

 singly terminal ; expansions of the marginal flowers 

 violet or white ; spinules of the pappus several, alter- 

 nately strong and much thinner, almost barbed with 

 reversed hairlets. C. scapigera. 



Leaves deeply cleft into very narrow segments. 



Almost glabrous; off-shoots rooting; leaves nearly all 

 radical, in tufts, pinnatisected, the lobes linear and 

 partially subdivided; headlets of flowers small, singly 

 terminal ; expansions of the marginal flowers violet or 

 white ; spinules of the pappus six to eight, short, unequal, 

 barbed. C. ant hem aides. 



