228 Karl M. Wiegand and Arthur J. Eames 



[R. sativus L. Radish. 



Springing up occasionally from scattered seeds and roots, but not established. 

 A common garden plant, native of Eurasia.] 



[R. Raphanistrum L. Wild Radish. Jointed Charlock. 



Not yet reported in the Cayuga Lake Basin, though it occurs in adjacent Cortland 

 Co. A weedy species, naturalized from Eu.] 



[Eruca (Tourn.) Adans.] 



[E. sativa Mill. Garden Rocket. 



Waste grounds near the Ithaca Gun Works, 1916 (Miss A. G. Mekeel) ; doubt- 

 fully established. 



Ont. to Pa. and Mo. Adventive from Eu.] 



9. Erucastrum Schimp. & Spenn. 

 1. E. gallicum (Willd.) Schulz. ('£. Pollich'ri Schimp. & Spenn.) 



A weed in waste places ; rare. 



South Ave., w. of baseball field, a few plants, 1918 (L. F. Randolph), since which 

 time it has persisted; library slope, 1923 (IV. C. Muenscher) ; railroad near Barge 

 Canal Terminal, 1925 (Muenscher) ; dump, lighthouse road, 1925 (Muenscher) ; w. 

 of bridge, Montezuma, 1925 (Muenscher) . 



Known in N. A. heretofore from e. Mass. and Wis. Adventive from Eu. 



10. Conringia (Heist.) Adans. 

 1. C. orientalis (L.) Dumort. Hare's-ear Mustard. 



A weed of rich soil about farm buildings, and in waste places elsewhere; becoming 

 occasional. June-Aug. 



Recently introduced, probably with feed : near Dwyer Pond ; about the farm 

 buildings of the Agricultural College ; Myers Point. 



N. B. and N. S. to Man. and Oreg., southw. to Del., Mo., and Colo. Native of Eu. 



11. Sisymbrium (Tourn.) L. 



a. Leaves mostly cauline, pinnate or pinnatifid. 



b. Stigmas 2-lobed; pubescence, when present, simple; leaves 1-pinnatifid, the teeth 

 sharp. 

 c. Pods 1-1.6 cm. long, appressed; petals 2-3 mm. long, bright yellow. 

 d. Pods and foliage puberulent. 1. S. officinale 



d. Pods and foliage glabrous. la. S. o., var. leiocar pum 



c. Pods 6-10 cm. long, spreading; petals 5-8 mm. long, pale yellow; leaf seg- 

 ments usually longer and narrower. 2. S. altissimum 

 b. Stigmas not lobed ; pubescence stellate ; leaves finely and crenately bipinnatifid ; 

 pods 0.7-1 cm. long. 3. S. brachycarpon 

 a. Leaves mostly in a basal rosette, entire or slightly toothed ; plant low. 



4. S. Thalianum 

 1. S. officinale (L.) Scop. Hedge Mustard. 



A weed of yards, waste places, and roadsides, mostly in dry gravelly soil ; rare. 

 June-Sept. 



C. U. campus, w. of athletic field and near Rockefeller Hall; railroad tracks, 

 McLean. 



Local in n. e. II. S. and Canada. Adventive from Eu. 



