The Flora of the Cayuga Lake Basin 225 



c. Pods ovate, 1.8-2.2 mm. wide; rosette leaves 2-pinnately parted, rarely 1-pin- 

 nately parted and the lobes incised; odor of plant fetid. [L. rudcrale] 



a. Cauline leaves clasping; plant minutely soft-downy; pods larger. 



3. L. campcstre 



1. L. virginicum L. Peppergrass. 



A weed on dry waste ground and roadsides, if not too sterile ; common. June-Oct. 

 Newf. to Minn, and Colo., southw. to Fla., Tex., and Mex., including the Coastal 

 Plain. 



2. L. densiflorum Schrad. (See Thellung, Mon. Lepidium, Mitth. Mus. Univ. 



Zurich 28. 1906. L. apctalum of Amer. authors, not Willd. L. ruderale, at 



least in part, of Cayuga Fl.) Peppergrass. 

 A weed in situations and soils similar to the preceding; common. June-Sept. 

 Me. to Ont. and B. C, southw. to Va., Tex., and Nev. Naturalized from Eurasia. 



[L. ruderale L. Fetid Peppergrass. 



"With the preceding [L. virginicum] and equally common" (D.). A Dudley 

 specimen labeled by Dudley L. ruderale, in the C. U. Herbarium, is L. densiflorum. 

 L. ruderale has not been seen in the Cayuga Lake Basin in recent years.] 



3. L. campestre (L.) R. Br. Downy Peppergrass. 



A weed on roadsides, in fields, and in waste places, mostly in heavy, often pure 

 clay, soils; becoming common. June-July 15. 



"First noticed in Ithaca, 1873" (D.). 



N. B. and N. S. to Ont. and Kans., southw. to Va., and on the Pacific coast. 

 Naturalized from Eu. 



6. Capsella Medic. 



1. C. Bursa-pastoris (L.) Medic. Shepherd's Purse. 



A weed by roadsides, in waste and cultivated lands, in gravelly or loamy soils ; very 

 common. Mar.-Dec. 



Widely distributed over the world. Naturalized from Eu. 



7. Camelina Crantz 

 1. C. microcarpa Andrz. (C. saliva of Cayuga Fl.) 



Roadsides, waste places, and newly planted fields ; rare. May 10-June 20. 



Babcock farm, Inlet Valley, 1925 {W. C. Mucnschcr) ; s. w. of Connecticut Hill, 

 1924 (Muenschcr) ; C. U. campus, 1875 and 1882 (D.) ; new athletic field, 1914; 

 Interlaken, 1915; Aurora, by the railroad (D.) ; rarely elsewhere. 



Newf. to B. C, southw. to R. I., Va., Kans., and Ariz. Adventive from Eu. 



[Neslia Desv.] 

 [N. paniculata (L.) Desv. Ball Mustard. 

 A weed in gravelly waste soil ; rare. June. 



Waste place w. of intersection of Wyckoff Road and Cayuga Heights Road, 1918; 

 doubtfully established. 

 Que. to Man. and B. C, southw. in the East to Pa. Naturalized from Eu.] 



8. Brassica (Tourn.) L. 17 



a. Upper cauline leaves clasping or at least with a broad, sessile, rarely broadly 

 cuneate, base; foliage glaucous, glabrous or nearly so, more or less succulent, only 

 in the last species thinner green and setose-hispid; (pedicels, together with the 

 pods, more or less spreading; mature pods 3-11 cm. long, 3-5 mm. wide). 



17 Compare Bailey, L. H. The cultivated Brassicas. Gentes Herbarum, vol. 1, fasc. 2. 1922. 



