74 CRUCIFER^, (^MUSTARD FAMILY.) 



21. SENEBIERA. DC. Wart-Cress. SwixeCress. 



Pod flattened contrary to the narrow partition ; the ^.wo cells indehiscent 

 and falling away at maturity from the partition as closed nutlets, strongly 

 wrinkled or tuberculate, 1 -seeded. Cotyledons narrow ai:d incumbently folded 

 transversely. Low and diffuse or prostrate annuals or biennials, with minute 

 whitish flijwers. Stamens often only 2. (Dedicated to J . ISenehier, a distin- 

 guished vegetable physiologist.) 



S. Df DYMA, Pers. Leaves 1 - 2-pinnately parted ; pods notched at the apex, 

 rough-wrinkled . — Waste places, at ports, E. Mass. to Va., etc. ; an immigrant 

 from farther south. 



S. Corox6pus, DC. Leaves less divided, with narrower lobes ; pods not 

 notched at the apex, tuberc/ed. — At ports, R. 1. to Va., etc. (Adv. from Eu.) 



22. CAKILE, Tourn. Sea-Rocket. 



Pod short, 2-jointed across, fleshy, the upper joint separating at maturity j 

 each indehiscent, 1-celled and 1-seeded, or the lower sometimes seedless. Seed 

 erect in the upper, suspended in the lower joint. Cotyledons obliquely accum- 

 bent. — Seaside fleshy annuals. Flowers purplish. (An old Arabic name.) 



1. C. Americana, Nutt. (American Sea-Rocket.) Leaves obovate, 

 sinuate and toothed ; lower joint of the fruit obovoid, emarginate ; the upper 

 ovate, flattish at the apex. — Coast of the Northern States and of the Great 

 Lakes. July - Sept. — Joints nearly even and fleshy when fresh ; the upper 

 one 4-angled and appearing more beaked when dry. 



23. RAP H ANUS, Tourn. Radish. 



Pods linear or oblong, tapering upward, indehiscent, several-seeded, contin- 

 uous and spongy within between the seeds, or necklace-form by constriction 

 between the seed's, with no proper partition. Style long. Seeds spherical and 

 cotvledons conduplicate, as in Brassica. — Annuals or biennials. (The an 

 cient Greek name from pa, quickly, and (paivu, to appear, alluding to the 

 rapid germination.) 



R. Raphanistrum, L. (Wild Radish. Jointed Charlock.) Pods 

 necklace-form, long-beaked ; leaves lyre-shaped, rough ; petals yellow, turning 

 whitish or purplish, veiny. — A troublesome weed in fields, E. New Eng. to 

 Penn. (Adv. from Eu.) 



Order IL CAPPARIDACE^^. (Caper Family.) 



Herbs (when in northern regions), with cruciform flowers, hut 6 or more 

 not tetradynamous stamens, a 1-celled pod with 2 parietal i^acentCB, and 

 kidneij-shaped seeds. — Pod as in Cruciferae, but with no partition ; seeds 

 similar, but the embryo coiled rather than folded. Leaves alternate, 

 mostly palmately compound. — Often with the acrid or pungent qualities 

 of CruciferaB (as in capers, the flower-buds of Cdpparis spinosa). 



1 Polanisia. Stamens 8 or more Pod many-seeded, not or scarcely stipitate. 



2. Cleome. Stamens 6. Pod linear, many-seeded, long-stlpitate. 



3. Cleomella. Stamens 6. Pod very short, rhomboidal, few-seeded, long-stipitate. 



L POLANISIA, Haf. 



Petals with claws, notched at the apex. Stamens 8 - 32, unequal. Recep- 

 tacle not elongated, bearing a gland behind the base of the ovary. Pod linear 



