840 Wisconsin Academy of Sciences, Arts, and Letters. 
419. Nasturtium Armoracia, Fries. Florse Radish. 
Frequent; low ground and along streams. Rarely 
perfecting fruit. 
420. Cardamine Pennsylvania, Muhl. (C. hirsuta of Man. in 
part.) 
Occasional; ditches and low, swampy woods. 
421. Cardamine rhomboidea, DC. Spring Cress; Bitter Cress. 
Frequent; wet meadows and swampy woods. 
422. Cardamine rhomboidea, DC., var. purpurea, Torr. (C. 
purpurea, Britton.) 
Occasional; blooms a couple of weeks earlier than the 
preceding, and seems to prefer greater shade. 
423. Dentaria laciniata, L. Tootbwort; Pepper-root. 
Frequent to common; along stream-borders in rich 
woods. 
424. Capsella Bursa-pastoris, Moencb. Shepherd’s Purse. 
Common; a troublesome weed, found almost every¬ 
where. Leaves vary greatly in form, being much more 
dissected when plants grow in dry soil. Flowering from 
March to December. 
425. Camelina sativa, Crantz. False Flax. 
Rare; a few individuals gotten in a flax field on 
Racine Prairie. The only collection. 
426. Arabis hirsuta, Scop. Hairy Rock Cress. 
Rare; in crevices of limestone at Horlicksville, Racine 
Co. The only station. 
427. Arabis laevigata,Poir. Smooth Rock Cress. 
Frequent; woods and shaded, rocky hillsides. 
428. Arabis Canadensis, L. Sicklepod. 
Rare; a single plant, only, taken in woods near Mil- 
man Road. 
429. Berteroa incana, D. C. 
Rare; in hog-pasture, Burlington, Racine Co. Not 
seen elsewhere. An adventurer from Europe. 
