74 CRUCIFER.E, (mustard FAMILY.) 



21. SENEBIERA, DC. Wakt-Cress. Swixe-Cress. 



Pod flattened contrary to the narrow partition ; the two cells indehiscent 

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

 wrinkled or tuberculate, 1-see^ded. Cotyledons narrow and 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. DIDT3IA, Pers. Leaves 1 - 2-pinnately parted ; jiodls votchod 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, li. 1. to Va., etc. (Adv. from Eu.) 



22. CAKILE, Tourn. Sea-Rocket. 



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

 eacJi 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, Xutt. (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. RAPHANUS, Tourn. Radish. 



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

 uous and spongv within between the .«!eeds, 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 

 cieiit Greek name from pa, (juicklj/, and (paivw, to appear, alluding to the 

 rapid germination.) 



R. Raphanistrim, L. ("Wild Radish. Joixted Charlock.) Pods 

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

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

 Penn. (Adv. from Eu.) 



Order 1L CAPPARIDACE^3E. (Caper Family.) 



Herbs (when in northern regions), ivith crvci form flowers, but 6 or more 

 not tetrad ijnamom stamens, a 1-celled pod ivith 2 parietal placentCB, and 

 lidney-sTiaped seeds. — Pod as in Cruciferce, but with no partition ; seeds 

 similar, but the embryo coiled rather than folded. LeaA'cs alternate, 

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

 of Cruciferae (as in capers, the flower-buds of Capparis spinosa). 



1 Polanisia* Stamens 8 orm ore 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. POLANi'SIA, 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 



