30 CRUCIFERiE. (MUSTARD FAMILY.) 



11. CAMELINA, Crania. 



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

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

 Flowers small, yellow. 



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

 North Carolina, and northward. Introduced. Q). 



12. SENEBIERA, Poir. 



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

 ular, 1-sceded, crested or pitted, indehiscent, at maturity separating from the par- 

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

 with pinnately 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 the 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 emarginate, the margins 

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



13. LEPIDIUM, L. Peppergrass. 



Silicle rounded or obcordate, compressed contrary to the narrow partition ; 

 valves carinate : cells 1-scedcd. Cotyledons accuinbent 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, wingless ; cotyledons accuinbent ; stamens mostly two. 

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



14. CAPSELLA, Vent. Shepherd's Purse. 



Silicle triangular-wedge-shaped, 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, Moench. — Waste ground, Florida and northward. 

 March and April. Introduced. 



15. CAKILE, Tourn. 

 Silicle 2-jointed ; the joints thick, I -celled, 1-eeeded Seed of the upper joint 



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

 al-, with pinnatifid or lobed leaves, and white or purple flowers in racemes op- 

 posite the leaves. 



