CLASS V. ORDER II. 113 



A stiff, prickly plant of the sea shore. Stems much branched, 

 angular, smooth. Leaves cylindrical while young, tipt with a 

 spine, sessile. The lower leaves are deciduous, so that when 

 the fruit is ripe, only the floral leaves remain. These are three 

 in number to each flower, resembling the other leaves, but short- 

 er, their base dilated and perfectly entire, not repand as in Sal- 

 sola Kali. The calyx is externally compressed into a broad, 

 membranous margin, flattish, but rising in the centre. Seed en- 

 closed in the calyx, cockle-shaped from its spiral cotyledons. — 

 Salt marshes. — July, August. 



Plants of this genus are used in the manufacture of Soda. 



Salsola salsa. Mich. Smooth Salt Wort. 



Herbaceous, decumbent, smooth ; leaves linear, 

 unarmed, fleshy; fructification crowded, somewhat 

 spiked. 



Stem somewhat erect with numerous spreading branches nearly 

 smooth, furrowed. Leaves linear, fleshy, semicylindric, some- 

 what of a glaucous hue, not prickly. Flowers obscure, sessile, 

 two or three together in the axil of each leaf. Calyx leaves ob- 

 tuse, connivent. Stamens slightly projecting. Seed small, spi- 

 ral. — Salt marshes. — August. — Annual. 



120. CHENOPODIUM. 

 Chenopodium album. L. JVJtite Goosefoot. Hog-weed. 

 Leaves rhomboid-ovate, eroded, entire behind, the 

 upper ones oblong, entire: seeds smooth, ^m. 



A common weed in cultivated and waste ground. Stem chan- 

 nelled, branched ; leaves mealy, the lower ones unequally tooth- 

 ed above, the upper ones smaller, entire. Bunches of flowers 

 erect, green or mealy. — July. — Annual. 



Chenopodium rubrum. L. Red Goosefoot. 



Leaves triangular, approaching to rhomboid; deep- 

 ly toothed, and somewhat siniiated; ckisters upright, 

 compound, leafy, ^^m. 



More green, fleshy, and compact than the last. Leaves sinu- 

 10* 



