74 CEDCIFER^. (mDSTARD FAMILY.) 



" 1. T. ARVENSE, L. {Field P. or Mithkidate Mustakd.) A smooth 

 annual, with broadly winged pod J' in diameter, several-seeded, deeply notched 

 at top ; style minute. — Waste places, shore of Lake Huron and in Lower 

 Canada; also Virginia. (Nat. from Eu.) 



17. LEPIDIUM, L. Peppekwoet. Peppebgkass. 



Pouch roundish, much flattened contrary to the narrow partition ; the valves 

 boat-shaped and keeled. Seeds solitary in each cell, pendulous. Cotyledons 

 incumbent, or in No. 1 accumbent ! Flowers small, white or greenish. (Name 

 from "KcTrlSwv, a little scale, alluding to the small flat pods.) — Oui-s are annuals 

 or biennials, except the last. 



« Leaves all with a tapering base ; the upper linear or lanceolate and entire, the lower 

 and often the middle ones incised or pinnatijid : pods orbicular or oval, with a 

 small notch at the top: the style minute or none: stamens only 2. 



1. L. Virginieum, L. (AVild Peppeegeass.) Cotyledons accumbent 

 and seed minutely margined ; pod marginless or obscurely margined at the top ; 

 petals present, except in some of the later flowers. — June- Sept. A common 

 roadside weed, which has immigrated from farther South. 



2. L. internifediuill, Gray. Cotyledons incumbent as in the following; 

 pod minutely wing-margined at the top; petals sometimes conspicuous, rarely 

 wanting; otherwise nearly as in Ko. 1. — Dry places, from Northern Michigan 

 and Illinois northward and westward. 



3. L. KUDEEALE, L. Morc diffuse, the smaller and oval pods and the seeds 

 marginless ; petals always wanting. — Roadsides, near Boston, Philadelphia, &c. ; 

 not common. (Adv. from Eu.) 



* * Stem-leaves loith a sagittate partly clasping base, rather croicded. 



4. L. CAMPESTEE, L. Minutcly so/i rfoit'n!/ ; leaves arrow-shaped, somewhat 

 toothed ; pods ovate, winged, rough, the style longer than the narrow notch. — 

 Old fields, Mass. and New York to Virginia: rare. (Nat. from Eu.) 



5. L. DeIba, L. Perennial, obscurely hoary; leaves oval or oblong, the 

 upper with broad clasping auricles ; flowers corymbose ; pods heaH-shajxd, 

 wingless, thickish, entire, tipped with a conspicuous style. — Astoria, near New 

 York, D. C. Eaton. (Adv. from Eu.) 



18. SENEBIERA, DC. Wart-Ceess. Swine-Ckess. 



Pouch flattened contrary to the narrow partition ; the two cells indehiscent, 

 but falling away at maturity from the partition as closed nutlets, strongly 

 wrinkled or tuberculate, 1-seeded. Cotyledons narrow and incumbcntly folded 

 transversely. Low and diifuse or prostrate annuals or biennials, with minute 

 whitish flowers. Stamens often only 2. (Dedicated to J. Scnebier, a distin- 

 guished vegetable physiologist.) 



1. S. didyma, Pers. Leaves 1 - 2-pinnately parted; pods notched at the 

 apex, rough-wrinkled. (S. pinnatifida, DC. ■ Lepidium didj-nium, i.) — Waste 

 places, at ports, Philadelphia to Virginia, &c. : an immigrant from farther 

 South. 



