26 TWELFTH ANKUAL REPORT. 



SISYMBRIUM, L. Hedge Mustakd. 



5. officinale. Scop. Hedge Mustard. 



A commou or frequent weed through the south half of the state. 



S. Thaliaiia, Gay. Mouse-car Cress. 



Minneapolis, Winchdl, Miss Butler. Rare. 



S. canescen.s, Nutt. Tansy Mustard. 

 Frequent, or common, throughout the state, 



S. canesceus, Nutt., var. bracliycarpuin, Torr. & Gray.* 

 Red river valley, Daivson. North. 



BRASSICA, Tourn. Mustaed. 



B. Sinajnstrum, Boiss. Charlock. Field Mustard, 



A common or frequent weed in grain-fields througliout the state ; so troublesome 

 in the Red river valley and southwestward that farmers allowing it to go to seed are 

 subjected to a penalty by law. 



B. alba, Gray. White Mustard. 



Lake City, Miss Manning; Goodhue county, Sandherg; Blue Earth county, Lei- 

 berg; Stearns county, Garrison. Rare. 



B. nigra, Koch. Black Mustard. 



A common or frequent weed througli the south half of the state. 



B. catnpestris, L.f Kale. 



Common in fields in Manitoba and around Winnipeg, Macoun; doubtless also in 

 the Red river valley in this state. 



DRABA, L. Whitlow-Gkass. 



D. arabisans, Michx. Whitlow- Grass. 



North shore of lake Superior, Jitrti. Infrequent. North. 



D. neiiiorosa, L., var. hebecarpa, Liadb. (D. nemoralis, Ehrh.) 

 About Rainy lake, Dmmmond {Macoun). North. 



Erysimum parviflorum, Nutt, (E. lanceolatum, Hook.) Canescently scabrous 

 with an appressed li-parted pubescence ;, stem low (about a foot high) and nearly 

 simple; leaves remarkably narrow, all linear or somewhat lanceolate, almost wholly 

 entire, densely clustered at the base of the stem ; siliques long, erect ; stigma emargin- 

 ate ; flowers small, sulphur yellow; claws of the petals longer than the calyx. Distin- 

 guished from E. cheiranthoides by its more pubescent leaves, [longer] siliques and 

 larger flowers. Torrey and Gray's Flora of N. A. 



*SiSYMBRiUK CANESCENS, Nutt., var. BRACHYCARPUM, Torr. & Gray. Lobes of the 

 leaves somewhat acute, and, with the stem, furnished with minute stipitate glands ; 

 petals rather longer than the calyx ; siliques scarcely attenuate at the base, somewhat 

 longer than the pedicels. Torrey and Gray's Flora of JV. A. 



iBrassica campestris, L. Annual weed in cultivated fields and waste places ; stem 

 VA to 3 feet high, with a few scattered, reversed hairs below ; leaves somewhat fleshy 

 and glaucous, lower lyrate-dentate, subciliate,3to7 inches long, one-third as wide, the 

 upper ones smaller, entire with rounded clasping lobes at base, tapering to an obtuse 

 point ; raceme l to 2 feet long ; sepals erect, spreading ; corolla yellow, 4 to 5 lines In 

 diameter ; siliques Vi inches long, with the style li inch ; seeds small, dark brown. 

 Wood's Class- Book. 



