MUSTARD FAMILY. 67 



23. SENEBIERA, WART CRESS, SWINE CRESS. (For J-. Senehirr, 

 a distinguished pliy.siologist.) Prostrate ® and (2), with minute whit- 

 ish flowers. Weeds from Eu. 



S. didyma, Pers. Pods rough-wrinkled, notched at apex. Waste places. 

 Mass. and S. near seacoast. 



5. Coronopus, DC. Pods warty, not notched at the apex. R. I. to 

 Va. at seaports. 



24. IBERIS, CANDYTUFT. (Iberia, an old name for Spain.) The 

 2 petals on the outer side of the flower much larger than the others. 

 Pods scale-shaped, roundish or ovate, notched at the wing-margined 

 top. Low garden plants, from Europe, nmch cultivated for orna- 



* Perennial, looody at the base. 



I. sempervirens, Linn. Evkugheen C. Rather woody-stemmed, tufted, 

 witli briglit green, lanceointe or linear-spatulate, thicliish, entire leaves, 

 and flat clusters of pure wliite flowers, in spring. " 



/. Gibraltdrica, Linn., witli large, rose-purple flowers in early spring, and 

 wedge-sliaped leaves, is occasionally seen ; not hardy N. 



* * Annual. 



I. umbellata, Linn. Common _C. Lower leaves lanceolate, the upper 

 linear and entire; flowers purple-lilac (or pale), in flat clusters in sum- 

 mer. Eu. 



/. coronaria, Don. Rocket C. Jjeaves lanceolate, coriaceous, sparingly 

 toothed. Flowers pure white in dense, spilie-like racemes in summer. 

 Nativity uncertain. 



25. ISATIS, WOAD. (Name of obscure derivation.) (g) One com- 

 mon species of Eu. 



/. tinctbria, Linn. Dyer's Woad. Rather tall, glabrous and glaucous, 

 the stem-leaves lanceolate and entire, sessile and somewhat sagittate ; 

 racemes of small yellow flowers panicled, succeeded by the hanging 

 samara-like closed pods ; flowers in early summer. Old gardens ; formerly 

 cult, for a blue dye. 



26. CAKILE, SEA ROCKET. (An old Arabic name.) (1) 



C. Americana, Nutt. Amekicax S. A fleshy herb, wild on the shore 

 of the sea and Great Lakes, with obovate wavy-toothed leaves, and pur- 

 plish flowers. 



27. RAPHANUS, RADISH. (Greek: to appear qniclchj, referring 

 to the viTV rapid germination of the seeds.) (2) From tiie Old 

 World. 



/?. Raphani strum, Linn. Wild R. or Join'ted CiiAnLOCic. Leaves 

 rough lyrate ; petals yellow, changing to whitish or purplish, and pods 

 narrow, long-beaked, divided across between the several seeds, so as to 

 become necklace-form. Troublesome weed in cult, fields.' 



/?. sailvus, Linn. Radish. Lower leaves lyrate ; flowers purple and 

 whitish, and closed pods thick and pointed ; the seeds separated by ir- 

 regular fleshy false partitions ; cult, for the tender and flesliy pungent 

 root ; inclined to run wild. 



R. caudatus, Linn. Rat-tail Radish. Probably a form of the last, 

 with small wikmIv root and pods (used for pickles) (j'-l'i' long. 



