30 CRUCltER^. (mustard FAMILY.) 



11. CAMELINA, Grant/,. 



Silicle ovoid or pear-shaped, flattened parallel to the broad partition ; valves 

 1-nervcd. Seeds numerous, oblong. Cotyledons incumbent. Style slender. — 

 Flowers small, yellow. 



I. C. sativa, Crantz. Leaves alternate, sagittate; silicle large. — Fields, 

 North Carolina, and northward. Introduced. ®. 



12. SENEBIERA, Poir. 



Silicle didymous, compressed contrary to tlie narrow partition ; the cells glob- 

 ular, 1-seeded, crested or pitted, indchiscent, at maturity separating from the par- 

 tition. Cotyledons incumbent. — Annual or biennial diffuse strong-scented herbs, 

 with pinnatcly lobed or divided leaves, and minute white flowers, in short ra- 

 cemes, opposite the leaves. Stamens 2, 4, or 6. 



1. S. pinnatifida, DC. Stem prostrate; leaves deeply pinnatifid, with 

 the numerous lobes toothed on tlie upper edge ; silicle pitted, emarginate at both 

 ends. — Waste places, Florida to North Carolina. March - May. — Racemes 

 many-flowered. 



2. S. CoronopUS, Poir. Stem prostrate; leaves deeply pinnatifid, with 

 the lobes entire, toothed, or pinnatifid ; silicles not emarginatc, the margins 

 crested. — "Waste places. Introduced. March and April. 



13. LEPIDIUM, L. Peppergrass. 



Silicle rounded or obcordatc, compressed contrary to the naiTOW partition ; 

 valves carinate . cells 1-seeded. Cotyledons accumbent and incumbent. Petals 

 sometimes wanting. Stamens 2, 4, or 6. — Leaves entire, toothed, or pinnately 

 divided. Flowers minute, in terminal racemes. 



1. L. Virginicum, L. Smooth; stem erect, much branched; leaves 

 lanceolate, sharply toothed, the lowest tapering and mostly pinnatifid toward the 

 base ; silicic orbicular, M'ingless ; cotyledons accumbent ; stamens mostly two. 

 — Waste places, very common. March -June. ® — Stem 1° - 2° high. 



14. CAPSELLA, Vent. Shepherd's Pdrse. 



Silicle triangular-wedge-sliaped, flattened contrary to the narrow partition, 

 many-seeded ; valves wingless. Cotyledons incumbent. — An annual herb, 

 with the radical leaves clustered and pinnatifid ; those of the stem clasping and 

 often entire. Racemes elongated. Silicle shorter than the spreading pedicel. 

 Flowers white. 



1. C. Bursa-pastoris, Mcench. — Waste ground, Florida and northward. 

 Marcli and April. Introduced. 



sum. 



15. CAKILE, Tot 



Silicle 2-jointed ; the joints thick, 1-celled, 1-seeded. Seed of the upper joint 

 erect, of the lower suspended. Cotyledons accumbent. — Fleshy sea-side annu- 

 als, with pinnatifid or lobcd leaves, and white or puiijle flowers in racemes op- 

 posite the leaves. 



