28 Key to the System of 



128. Radicle turned to the sides of the cotyledons. 



Herbs, often beset with branched hairlets ; sepals erect, 

 almost equal ; petals white, purplish or yellow ; fruit 

 nearly cylindrical, rarely almost ellipsoid ; seeds several 

 or numerous, forming one or two irregular rows in each 

 cell ; funicle rigid. Figure 8. Erysimum, 635 



Radicle turned to the edges of the cotyledons ... 129 



129. Fruit almost quadrangular. 



Herbs, mostly glabrous ; leaves usually much lobed ; sepals 

 generally erect, almost equal; petals yellow; fruit narrow; 

 seeds several or numerous, forming one row in each cell. 



Barbarea. 639 



Fruit almost compressed. 



Herbs, either glabrous or beset with branched hairlets ; 

 leaves usually beyond their base lobeless ; sepals often 

 unequal, generally erect ; petals white or purplish ; fruit 

 narrow-cylindrical ; seeds several or numerous, forming 

 one or two rows in each cell, with a prominent margin. 



Arabis. 640 



130. Stigma pointed. 



Herbs, beset with simple or branched hairlets ; sepals erect, 

 two often with turgidly enlarged base ; petals white or 

 purplish ; fruit usually cylindrical and somewhat com- 

 pressed ; seeds numerous, forming one or two irregular 

 rows in each cell ; radicle turned to the sides of the 

 cotyledons. Wilckia* 641 



Stigma blunt. 



Herbs, either glabrous or beset with simple hairlets ; sepals 

 erect or spreading, almost equal ; petals white, purplish 

 or yellow; fruit narrow- cylindrical, rarely for maturation 

 buried and then comparatively short and broad (Geo- 

 coccus) ; funicle capillary ; seeds numerous, forming one 

 or two irregular rows in each cell ; radicle turned to the 

 sides of the cotyledons. Sisymbrium. 642 



CAFF ABIDE A B. 



131. Petals four; fruit indehiscent. 



Shrubs, erect or climbing, or trees ; leaves simple ; sepals 

 four, free or the two outer quite connate ; stamens dis- 

 connected; ovulary on a stalk -like prolongation (stipes) ; 

 stigma sessile. Figure 7. Capparis. 645 



