CRUCiFER^. (mustard familt.) 39 



16. CAPSEIir.A, Vent. Shepherd's Pdksb. 



Pouch inversely lieart-shaped-triangular, flattened contrary to tlie narrow par- 

 tition; the Talves boat-shaped, wingless. Seeds numerous. Cotyledons incum- 

 bent. — Annuals : flowers small, white. (Name a diminutive of capsula, a pod.) 



1. C. BuKSA-piSTOBis, Moench. Root-leaves clustered, pinnatifid or 

 toothed; stem-leaves arrow-shaped, sessile. — Waste places ; the commonest of 

 weeds. April -Sept. (Nat. from Eu.) 



17. S1JBUL.AKIA, L. Awlwoht. 



Pouch oval, txxrgid, somewhat flattened contrary to the broad partition. Seeds 

 several. Cotyledons long and narrow, incumbently folded transversely, i. e. 

 the cleft extending to the radicular side of the curvature. Style none. — A 

 dwaif stemless perennial, aquatic ; the tufted leaves awl-shaped (whence the 

 name). Scape naked, few-flowered, 1'- 3' high. Flowers minute, white. 



1. S. aqitutica, L. — Margin of lakes in JVIaine. June, July. (Eu.) 



18. SEIVS:Bi:f:RA, DC. Waet-Cress. Swine-Cress. 



Pouch flattened contrary to the nan-ow partition ; the two cells indehiscent, 

 but falling away at maturity from the partition as closed nutlets, strongly wrin- 

 kled or tuberculate, 1 -seeded. Cotyledons as in the last. — Low and diffuse or- 

 prostrate annuals or biennials, "with minute whitish flowers. Stamens often only 

 2. (Dedicated to Senebier, a distinguished vegetable physiologist.) 



1. S. didyma, Pers. Leaves 1 - 2-pinnately parted; pods notched at the 

 apex, raugh-vrrinJded. (S. pinnatifida, DC. Lepidium didymum, L.) — Waste 

 places, at ports, &c., Virginia and Carolina : an immigrant from farther South. 



2. S. Cok6n6pus, DC. Leaves less divided, with narrower lobes ; potfe no* 

 notched at the apex, tuberded. Virginia, Pursh. Rhode Island, Robbins. (Adv. 

 from Eu.) 



19. CAKil.,E, Toum. Sea-Rociust. 



Pod short, 2-jointcd across, angulai-, fleshy, the upper joint flattened at the 

 apex, separating at maturity; each indehiscent and 1-celled, 1-soeded; the lower 

 sometimes seedless. Seed erect in the upper, suspended in the lower joint. 

 Cotyledons rather obliquely accumbent. — Sea-side, branching, fleshy annuals. 

 Flowers purplish. (An old Ai-abic name.) 



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

 vate, sinuate and toothed ; lower joint of the fniit 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 ; tho 

 upper one 4-angled and appearing more beaked when dry. 



30. RAPHATVUS, L. Radish. 



Pods linear or oblcng, tapering upwards, 2-jointed; the lowfir joint often seed 

 less and stalk-like ; the upper necklace-form by constriction bet^vecn the seeds. 



