30 (jRuciFERjK. (MUSTARD FAMILY.) 



11. CAMELINA, Grant/.. 



Silicic 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; silicic large. Fields, 

 North Carolina, and northward. Introduced. . 



12. SENEBIERA, Poir. 



Silicic didymous, compressed contrary to the narrow partition ; the cells glol>- 

 ular, 1 -seeded, 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 ; silicic pitted, emarginate at both 

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

 m any -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. 



Silicic rounded or obcordate, compressed contrary to the narrow 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, wingless ; cotyledons accumbent ; stamens mostly two. 

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



14. CAPSELLA, Vent. SHEPHERD'S PI;RSE. 



Silicic 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. Silicic shorter than the spreading pedicel. 

 Flowers white. 



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

 March and April. Introduced. 



15. CAKILE, Tourn. 



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 purple flowers in racemes op- 

 posite the leaves. 



