170 XIII. CRUCIFERJE. SINAPIS. 



2. C. CHEIRI. Watt-Flower. St. somewhat shrubby and decumbent at base ; 

 Ivs. entire or slightly dentate, lanceolate, acute, smooth ; branches angular ; pet. 

 obovate; siliques erect, acuminate. % From S. Europe. A popular garden 

 flower, admired for its agreeable odor and its handsome corymbose clusters of 

 orange or yellow flowers. Plant 1 2f high. Jn. 



22. MATTHlOLA. R. Br. 

 In honor of P. A. Matthioli, physician to Ferdinand of Austria, and botanic author. 



Calyx closed, 2 of the sepals gibbous at base ; petals dilated ; 

 siliques terete ; stigmas connivent, thickened or cornute at the back. 

 Herbaceous or shrubby, oriental plants, clothed with a hoary, stellate 

 pubescence. 



1. M. ANNUUS. R. Br. (Cheiranthus. Linn.} Ten-weeks Stock. St. herba- 

 ceous, erect, branched ; Ivs. hoary-canescent, lanceolate, obtuse, subdentate ; 

 silique subcylindrical, without glands. A fine garden flower from S. Europe. 

 Stem 2f high, and, with the leaves, covered with a soft, stellate pubescence. 

 Flowers variegated. Jn. j- 



2. M. INCANUS. R. Br. (Cheiranthus. Linn.} Purple July Flower. St. 

 shrubby at base, erect, branched; Ivs. lanceolate, entire, hoary-canescent; 

 siliques subcylindrical, truncate and compressed at apex, without glands. (g) 

 One of the most popular flowers of the genus, native of England, &c. Stem 

 2f high. Flowers purple. Several varieties are enumerated, as the Double- 

 flowered, Brompton Stock, and Brompton Queen. Jn. f 



3. M. FENESTRALIS. R. Br. (Cheiranthus. Linn.} Window July Flower. 

 St. sufiruticose, erect, simple ; Ivs. crowded, recurved, undulate, downy ; siliques 

 downy, without glands, broadest at base. From S. Europe. Plant If high. 

 Flowers numerous, large, purple. Jl. Aug. -f 



4. M. GRJECUS. R. Br. (Cheiranthus. Linn.} Grecian Stock. St. herba- 

 ceous, erect, branched ; Ivs. lanceolate, glabrous ; siliques somewhat compressed, 

 without glands. () From Greece. Plant about If high, distinguished from 

 the remainder of the genus by its smooth foliage. Flowers white, appearing 

 all summer, j- 



23. SINAPIS. 



Sepals equal at base, spreading ; petals ovate, with straight claws ; 

 siliques subterete ; valves veined ; style short and subulate, or ensi- 

 form ; seeds in a single series, subglobose, . Fls. always yellow. 



1. S. NIGRA. Black Mustard. 



Lower Ivs. lyrate, upper linear-lanceolate, entire, smooth ; silique smooth, 

 somewhat 4-angled, appressed to the rachis of the raceme. In cultivated 

 grounds and waste places. Stem 3 6f high, round, smooth, striate, branching. 

 Leaves all petiolate, lower ones variously lobed and dentate, upper ones pen- 

 dulous and entire. Sepals and petals sulphur-yellow. Pods very numerous, 

 nearly 1' long, beaked with the 4-sided styles. Seeds 00, small, globose, nearly 

 black, well known as a condiment. Jn. Jl. ^ 



2. S. ARVENSIS. Field Mustard. 



St. and Ivs. hairy ; silique smooth, many-angled, torose, about 3 times 

 longer than the slender, ancipital style. Naturalized in N. Y., T. fy G., 

 and in Vt., Dr. Robbins. Lower leaves large, sublyrate-pinnatifid, upper ones 

 oblong-ovate, all repand-toothed. Silique somewhat spreading, 1|' long. Seeds 

 large and black. Jn. Aug. 



3. S. ALBA. White Mustard. Lvs. lyrate, smoothish ; siliques hispid, torose, 

 shorter than the ensiform beak ; sds. large, pale yellow. Native of Europe. 

 Stem 2 5f high, thinly hirsute. Leaves all lyrately pinnate, dentate, petiolate. 

 Siliques spreading, about 4-seeded. The seeds are used for about the same 

 purposes as those of S. nigra, much esteemed in medicine. Jn. Jl. 



