254 Key to the System of 



JUSSIETTA. 



1165. Semi-aquatic or floating. 



Glabrous or beset with soft hairlets aud bearing cellular 

 natatory organs ; stipules glandule-shaped ; leaves from 

 obovate- to elliptical-lanceolar, narrowed into their stalk; 

 flowers comparatively large, axillary, solitary, conspicu- 

 ously stalked ; petals five, quite yellow ; stamens ten ; 

 fruit cylindrical. (J. repens, partly.) J. diffusa. 



COLLETIA. 



1166. Branchlets articularly inserted on the branches. 



Usually a low shrub, glabrous or beset with very short 

 hairlets ; branches smooth, for a long while greenish ; 

 branchlets rather robust, cylindrical, pungent ; leaves 

 scantily developed, but then crowded into clusters, small, 

 from broad -linear and cuneate to elliptical ; flowers 

 axillary, few together or solitary, on short stalklets ; 

 calyx white ; petals present, but minute ; fruit bluntly 

 somewhat trilobed. C. pubescens. 



CRYPTANDRA. 



1167. Calyx comparatively small or quite minute ... 116$ 

 Calyx comparatively large ... ... ... ... 1174 



1168. Flowers densely crowded ... ... ... ... 1169 



Flowers hardly crowded ... ... ... ... 1172 



1169. Leaves from linear to elliptical 1170 



Leaves from ovate or orbicular to cuneate-obcordate 1171 



1170. Clusters of flowers stalked. 



Vestiture to some extent velvet-like ; leaves firm, mostly 

 from linear to elliptical, revolute at the margin, some- 

 what pointed, above glabrous or somewhat beset with 

 hairlets ; floral leaves often velvety-whitish above from 

 short hairlets ; flower-clusters stalked, small ; fruitlets 

 indehiscent, their endocarp membranous. 



C. vexillifera. 



