348 Key to the System of 



1543. Corolla beset with starry-velvety vestiture outside. 



Somewhat shrubby, but never tall, extensively invested 

 with branched often greyish hairlets ; branchlets hardly 

 angular ; leaves from narrow-elliptic to ovate ; flowers 

 from one to three on each stalk, rather small ; fruit very 

 small, one-seeded. D. xnarifolia. 



Corolla beset with a plumous-velvety vestiture out- 

 side. 



Somewhat shrubby ; branches hardly angular, but streaked ; 

 leaves from linear- to elliptic-lanceolar, occasionally 

 somewhat indented, slightly beset with a short vestitur-e 

 underneath ; flowers often in compound leafy racemes ; 

 hairlets of the corolla dark ; fruit very small, one-seeded. 



D. lanceolata. 



1544. Stem undeveloped. 



Alpine, dwarf, often beset with scattered spreading hairlets ; 

 leaves all crowded at the root and usually surpassing 

 the inflorescence, from elliptic- to spatular-obovate, entire 

 or slightly denticulated ; bracteoles narrow ; segments 

 of calyx three, elliptic-lanceolar; corolla small, dingy- 

 yellowish ; seeds without any marginal expansion. 



V. montana. 



Stem developed ... ... ... ... ... 1545 



1545. Bracts disconnected. 



Seldom quite glabrous; leaves all radical, from obovate 

 to elliptic- and narrow-lanceolar, often deeply incised ; 

 flowers in a dichotomous cyme ; bracts opposite, quite 

 foliaceous, the lower large and generally lobed or 

 indented ; segments of calyx five, four of them narrow- 

 lanceolar or elliptical, the fifth larger and more ovate ; 

 corolla large, yellow, with a basal conic-cylindrical 

 protrusion ; seeds brownish, surrounded by a broad 

 membranous expansion. V. paradoxa. 



Bracts connate. 



Rather tall desert-plant, glabrous and greyish -green; leaves 

 all radical, from obovate to elliptic- or elongate-lanceolar, 

 entire or indented ; flowers in a dichotomous cyme ; bracts 

 firm, opposite, large, entire, acute ; segments of calyx 

 five, from deltoid to ovate-lanceolar, the uppermost 

 largest ; corolla purplish, the expanding membranes of 

 its lobes narrow or rudimentary ; seeds brownish, 

 surrounded by a broad membranous expansion. Figure 

 95. V. conuata. 



