CRUCIFEIUE. 27 



7. COCHLEARIA: 



Pouch sessile, ovate, globose or oblong ; valves ventricose. 

 Seeds many, not margined. Calyx equal, spreading. Petals 

 entire. Stamens without teeth. Tetra dynamia. Siliculosa. 



C. armoracea Linn. : root large, fleshy ; radical leaves oblong-cre- 

 nate ; cauline ones long-lanceolate, toothed or incised ; pouch ellipti- 

 cal. 



HAB. Waste grounds. June. If. Root large and very pungent 

 to the taste. Stem 2 feet high. Flowers white, in elongated 

 racemes. Introduced. Horse Radish. 



8. LEPIDIUM. Linn. 



Pouch ovate or somewhat cordate ; valves keeled or rarely 

 ventricose, dehiscent ; cells 1-seeded. Seeds somewhat tri- 

 quetrous or compressed. Tetr adynamia. Siliculosa. 



1. L. virginicum Linn. : stem branched ; radical leaves pinnatifid ; 

 stem leaves linear-lanceolate, serrate, smooth ; flowers with 4 petals 

 and 2 4 stamens ; pouch orbicular, flat, emarginate, shorter than the 

 pedicel. Thlaspi virginianum Poir. 



HAB. Sandy fields. Can. to Geor. W. to Miss. June Oct. 

 @. Stem a foot high, panicled above. Flowers minute, white. 

 Closely resembles L. ruderale, but the cotyledons are accumbent. 

 Hooker. Wild Pepper-grass. 



2. L. campestre Eroicn : cauline leaves sagittate, toothed ; pouch 

 ovate, winged, emarginate, scaly-punctate. Thlaspi campestre Linn. 



HAB. Hills. N. Sfc May. 0. Stem-a. foot high, erect. Leaves 

 pubescent. Flowers white. Field Pepper-grass. 



3. L. hirtum Smith : pouch ovate, winged, emarginate, hirsute ; cau- 

 line leaves sagittate, villose, sub-dentate. 



HAB. Fields, near New-Brunswick, N. J. June. $. Stem 12 

 18 inches high, very leafy. Lower leaves petioled, and somewhat 

 pinnatifid ; stem leaves sub-clasping, sagittate, toothed, covered 

 with a whitish pubescence. Flowers in dense hairy racemes. 

 Povth, in my specimens, scabrous, emarginate, with a style 

 about half its length. Perhaps introduced. 



Hairy Field Pepper- grass. 



9. CAMELINA. Crantz. 



Pouch obovate or subglobose ; valves ventricose, dehiscent 

 with part of the style ; cells many seeded. Style, filiform. 

 Seeds oblong, not margined. Tetr adynamia. Siliculosa. 



C. sativa De Cand. : pouch obovate-pyriform, margined, tipped 

 with the pointed style ; leaves roughish, subentire, lanceolate, sagit- 

 tate ; flowers numerous, in corymbs. Myagrum sativum Linn. 



