30 CRUCIFERiE. (mustard FAMILY.) 



11. CAMELINA, Crantz. 



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

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

 Flowers small, yellow. 



1. C. sativa, Crantz. Leaves altematc, sagittate; silicic large. — Fields, 

 North Carolina, and northward. Introduced. Q). 



12. SENEBIERA, Toir. 



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

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

 tition. Cotyledons incumbent. — Annual or biennial ditTuse strong-scented herb.s, 

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

 cemes, opi)ositc the leaves. Stamens 2, 4, or 6. 



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

 the numerous lobes tootlied on the npper edge ; silicic ])ittcd, cmarginate at both 

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

 many-flowered. 



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

 the lobes entire, toothed, or pinnatifid ; siliclcs not cmarginate, the margins 

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



13. LEPIDIUM, L. Peppergrass. 



Silicic rounded or obcordatc, compressed contrary to the nan-ow partition ; 

 valves carinate : cells 1-scedcd. Cotyledons accumbent and incumbent. Petals 

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

 divided. Flowers minute, in terminal racemes. 



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

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

 base ; silicic orbicular, wingless ; cotyledons accumbent ; stamens mostly two. 

 — Waste places, very common. March -June. (1) — Stem \°-2° high. 



14. CAPSELLA, Vent. Siikpherd's Purse. 



Silicic triangular-wedge-shaped, flattened contrary to the narrow partition, 

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

 with the radical leaves clustered and i)innatifid ; those of the stem clasping and 

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

 Flowers white. 



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

 March and April. Iiilruduced. 



15. CAKILE, Tonm. 

 Silicic 2-jointed ; the joints thick, l-cellcd, l-.sceded. Seed of the upper joint 

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

 als, with pinnatifid or lobed leaves, and wliite or pinplc (lowers in racemes op- 

 posite the leaves. 



