74 CRUCIFER.E. (MUSTARD FAMILY.) 



21. SENEBIEKA, DC. WART-CRESS. SWINE-CRESS. 



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 ard incumbently folded 

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

 whitish flowers. Stamens often only 2. (Dedicated to J. Senebier, a distin- 

 guished vegetable physiologist.) 



S. DIDYMA, 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. CoRON6pus, DC. Leaves less divided, with narrower lobes ; pods not 

 notched at the apex, tubercled. 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 ; 

 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 ; th* upper 

 one 4-angled and appearing more beaked when dry. 



23. RAPHANUS, 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 seeds, with no proper partition. Style long. Seeds spherical and 

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

 cient Greek name from fa, quickly, and Qaivu, to appear, alluding to the 

 rapid germination.) 



R. RAPHANf STRUM, L. (WlLD RADISH. JOINTED CHARLOCK.) Pods 



necklace-form, long-beaked j 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 11. CAPP ARID ACE JE. (CAPER FAMILY.) 



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

 not tetradynamous stamens, a l-celled pod with 2 parietal placentae, and 

 kidney-shaped seeds. Pod as in Cruciferse, 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 Cruciferae (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-stipitate. 



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



1. POLANISIA, Raf. 



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 



