387] FLORA OF COLUMBIA AND VICINITY 1 45 



173. lODANTHUS (JODANTHUS) Gray [THE- 



LYPODIUM Endl.] . Purple rocket. 



436. I. (J.) pinnatifldus (Michx.) Steud. \T. pinnatifidum 

 (Michx.) Watson]. 



Scarce in wet places. 



Pennsylvania to Minnesota; Tennessee to Louisiana 

 and Texas. 



174. NASTURTIUM R. Br. [RORIPA Scop.]. 

 Cress. 



437. N. Armoracia Fries. [R. Armoracia (L.) Hitchc.]. 

 Horse radish. 



Roadsides and yards; frequent. 

 Europe, thence to America. 



43S. N. ofiBlcinale R. Br. \R.. Nasturtium (L.) Rusby]. 

 Water cress. 

 Springs near Rocheport. 

 Europe and Asia, thence to Americ.4. 



439. N. sylvestre (L.) R. Br. \R. sylvestris (L.) Bess.]. 

 Creeping yellow water-cress. 



Waste places; rare. 



Europe, thence to eastern North America. 



440. N. sinuatumNutt. [/?. .rmw^to (Nutt.) Hitchc] Yel- 

 low cress. 



Common on the muddy banks of the Missouri. 

 Minnesota to Saskatchewan and Oregon; Arkansas to 

 Arizona and Nevada. 



441. N. palustre (L.) DC. [A', terrestre R. Br.: R. palustris 

 (L.) Bess.]. Marsh cress. 



In swamps and about streams and ponds; common and 

 variable. 



Greenland and North America: Tropical America: 

 Europe and Asia: Australia and New Zealand. 



442. N. obtusum Nutt. [/?. obtusa (Nutt.) Britton]. 

 Alluvial flats and stream-beds which are dry in summer. 



