134 Key to the System of 



VIOLA. 



658. Stem erect or recumbent. 



Leaves cordate or somewhat renate ; petals white. 



V. Caleyana. 



Stemless or with rooting offshoots ... ... ... 659 



659. Leaves from renate to cuneate-rhomboid. 



Offshoots rooting ; petals mixedly white and lilac or bluish. 



V. hederacea. 



Leaves from elliptical to broad-oval, with a bilobed 

 or rounded base. 



Stemless ; flowerstalks much elongated ; petals violet. 



V. betonicifolia. 



FOI.YGAI.EAi:. 



FOX.1TGAX.A. 



660. Leaves from roundish-ovate to lanceolar. 



Dwarf, perennial herb ; leaves small, scattered, flat, their 

 secondary venules reticulated; flowers small, in corymbous 

 racemes ; interior sepals obovate, nearly as long as the 

 fringe-crested anterior petal and the obcordate-orbicular 

 fruit. P. Sibirica. 



COIKESFERIKA. 



661. Climbing or twining. 



Leaves from lanceolar or elliptical to linear, distant ; flowers 

 generally blue; outer sepals disunited, much shorter than 

 the inner ; fruit elliptical-cuneate, attenuated into a 

 narrow base. C. volubile. 



Erect 662 



662. Flowers blue ... ... 663 



Flowers pink ... ... ... ... ... ... 665 



663. Fruit broadly cuneate-obovate. 



A rigid, shrubby plant ; leaves distant, minute, pungent ; 

 outer sepals disunited, about half as long as the orbicular 

 inner sepals. C. SCOparium. 



Fruit much narrowed downwards ... ... ... 664 



