132 Key to the System of 



648. Flower one 649 



Flowers more than one ... 651 



649. Leaves orbicular, very minute. 



Minute plant ; stipules scarious ; leaves inserted above their 

 base, rosulate- arranged ; flower on a capillary glabrous 

 stalk, minute ; sepals, petals, stamens and styles four ; 

 seeds ovate. D, pygmaea. 



Leaves elongated ... ... 650 



650. Leaves obovate-cuneate. 



Root tuber-bearing ; leaves comparatively large, rosulate- 

 arranged ; flowers large ; their stalks hardly longer than 

 the leaves ; styles three, penicillar-multifid ; seeds nearly 

 ovate. Figure 11. D. Whittakeri. 



Leaves linear-elliptical. 



Alpine plant ; root somewhat creeping ; leaves alternate but 

 crowded ; flower-stalk from hardly longer than the leaves 

 to twice as long ; styles usually three, undivided ; stigmas 

 renate ; outer seed-membrane bluntly protracted. 



D. Arcturi. 



651. Leaves roundish. 



Dwarf plant ; root fibrous ; leaves rosulate-arranged, very 

 small ; racemes dense, beset with glandule-bearing hair- 

 lets ; flowers small ; petals crimson ; stigmas three, bifid ; 

 seeds ovate-globular. D. glanduligera. 



Leaves spatular. 



Root fibrous ; leaves rosulate-arranged ; racemes on rather 

 long stalks, beset with glandule-bearing hairlets ; flowers 

 small ; styles three, bifid ; seeds ellipsoid. 



D. spatulata. 



652. Leaves very much longer than broad. 



Root fibrous; leaves scattered, long-linear, acute, undivided; 

 racemes lateral, slightly beset with glandule-bearing hair- 

 lets ; styles three, bifid ; seeds ovate. D. Indica. 



Leaves about as long as broad ... ... ... 653 



