24 TWELFTH ANNUAL EEPORT. 



N. siimatiim, Nutt. Water-Cress. 



Upper Mississippi river, Garrison; New Ulni, Juni; Pipestone county, Lciherg; 

 lower Minnesota river. Parry; lake PepiU: Miss Manning. 



X. sessilifloruiii, Nutt. Water-Cress. 



Lapham. Winona county, Holzinger. South. 



N, palustre, DC. Marsh Cress. 



Common, or frequent, throughout the state. 



N. palustre, DC, var. liispiduin, Fisch. & Mey. 



Kedwood Falls, Pemherton. Perhaps the prevailing form of the species in this state. 



N. lacustre, Gray. Lake Cress. 

 Lapham. Southeast. 



N. Armoracia, Fries. Horse-radish. 



Adyentive, Mankato, ieiber-fif; Northfield, Chaney. 



DENT ARIA, L. Toothwort. Pepper- root. 



D. dipliylla, Michx. Two-leaved Pepper-root. 



Freeborn and Blue Earth counties, Upham; lake Superior, Whitney. East. 



D. laciniata, Muhl. Toothwort. 



Frequent southeastward ; extending northwest to Saint Paul, Miss Cathcart, Mar- 

 tin county, Cratty, and Fergus Falls, Leonard. 



CARD AMINE, L. Bitter Cress. 



C. rlioinboidea, DC. Spring Cress. 

 Frequent, or common, throughout the state. 



C pratensis, L. Cuckoo Flower. 



Lake Superior to the sources of the Mississippi, Houghton. North. 



C. hirsiita, L. Small Bitter Cress. 



Common through the north half of the state ; less frequent or rare southward. 

 Glabrous specimens are sent by Mr. Cratty from Emmet county, Iowa. "A peculiar 

 form grows on the height of land west of lake Superior, which seems to connect the 

 species with the following variety," Macoun. 



C hirsuta, L., var. sylvatica, Gray. 



Lake Minuetonka, i?oZ>er(8, Herrick; Martin county (in woods), Cra^ij/, determin- 

 ed by Watson. 



ARABIS, L. Rock Cress. 



A. lyrata, L. Rock Cress. 



Common, or frequent, through the north half of the state ; extending thus south to 

 Red Wing (common), Sandhcrg, and Winona, Holzinger; wanting southwestward. 



A. deiitata, Torr. & Gray. Rock Cress. 



Woods, Blue Earth county, Leiberg; Martin county (plentiful), Cratty. South. 



A. hirsuta, Scop. Hairy Rock Cress. 

 Frequent throughout the state. 



