332 Key to the System of 



1485. Clusters of flower-headlets whitish. 



Slender plant, scantily branched, closely beset with a greyish 

 appressed vestiture ; leaves linear, mostly opposite, often 

 blunt ; clusters of flower-headlets from ellipsoid to nearly 

 globular ; flowers two or three within each involucre ; 

 pappus -bristlets plumous only at the summit. 



(C. Lessingi, partly.) C. lacteus. 



Clusters of flower-headlets yellow ... ... ... 1486 



1486. Leaves mostly opposite. 



Slender plant, scantily branched closely beset with a greyish 

 appressed vestiture ; leaves linear, often acute ; clusters 

 of flower-headlets from ellipsoid to nearly globular ; 

 flowers two or three within each involucre ; pappus- 

 bristlets plumous towards the summit. 



(C. Lessingi, partly.) C. citreus. 



Leaves mostly scattered. 



Beset with a somewhat cottony vestiture ; leaves linear ; 

 clusters of flower-headlets from ovate to globular : flowers 

 two or three within each involucre ; pappus -bristlets 

 unequal, plumous only at the summit. C. Sonderi. 



ANCJIANTHUS. 



1487. Pappus developed ... 1488 



Pappus undeveloped or quite rudimentary ... ... 1490 



1488. Clusters of flower-headlets attenuated at their base. 



Dwarf, beset with somewhat cottony vestiture ; leaves 

 short, from cuneate- elliptical to linear ; headlets supported 

 by floral leaves, forming yellow or brownish shining 

 almost ellipsoid spikes ; involucral bracts four or five ; 

 flowers usually two within each involucre ; pappus very 

 short, consisting of a torn membrane, usually without 

 any capillary elongations. A, bracliy pappus. 



Clusters of flower-headlets almost truncate at their 

 base 1489 



1489. Clusters of headlets unsupported by floral leaves. 



Dwarf, beset with somewhat cottony vestiture ; leaves 

 short, from cuneate-elliptical to linear ; flower-headlets 

 forming yellow shining short-cylindric spikes ; involucral 

 bracts four or five ; flowers one to three within each 

 involucre ; pappus producing two or three capillary, at 

 the summit plumously dilated bristlets. 



A. tomentosus. 



