BOTANY OF LA SALLE COUNTY. 51 



oblong, entire. 

 A. Canadensis. Leaves narrow, long-, drooping; 



pods 3 to 3^ in. long, curved like a sickle. 



Bluffs. ' 

 Jh. A. levigata. Stem leaves sessile, flowers small, 



Y. partly clasped; pods long, sessile and re- 

 curved, Y. 

 A. dentata. Roughish, slender, 1 to 2 ft. high; 



leaves oblong, obtuse, very unequally toothed, 



those of tem numerous, somewhat clasping, of 



the root broader and petiolate. 

 DRABA. Whitlow grass. 



D. Caroliniana. Leaves obovate, mostly entire, 



flowers in small racemes on leafless stems; Ito 5 



in. high; sandy lands. 

 ALYSSUM calycinum. Small, hairy; leaves narrow, 



pale Y., broadest at outer end. 

 NASTURTIUM. Water cresses. 



Small plants growing in damp places. 

 N. officinale. W. In brooks and about springs, 4 in. 



Escaped from gardens. 



N. palustre. Leaves much divided, Y. Ju. to Sep. 

 N. Armoracia. Horse raddish. Armoracia rusti- 



cans of Wood. 

 BARBAREA. A strong growing plant with deeply 



toothed leaves and small spikes of bright Y. 



flowers. M. Ju. ; wet places. 

 Order 15. CAROPHYLLA CEAE. Pinks. 



Plants with opposite leaves, stems with swollen 



joints and 5 to 10 parted flowers. 

 SAPONARIA. P. Bouncing Bet. 



S. officinalis. Stems in clusters, nearly erect; leaves 



lanceolate, acute, paleG.; flowers 1 in. dia., pale 



Pi,, in clusters. About old buildings. River 



roadside S. Ottawa. 



