ORDER 106. CHENOPODIACE^E. 



285 



1. Flower of Chenopodinm 

 album. 2. Calyx, &c., re- 

 moved, showing the ovary and 

 2 stamens. 3. Seed cut across, 

 showing the coiled embryo. 

 4. Branch of Salicornia herba- 

 cea. 5. Two joints magnified. 

 6. Ovary of a flower. 



Leaves flat, neither fleshy nor spiny. Embryo a ring around copious albumen... (a* 



g Leaves none, or linear and fleshy or spinescent. Embryo a spiral or folio. Albumen O...(y) 



a Stems twining and climbing. Flowers white, in racemes BOUSSINGAULTIA, 1 



a Stems erect. Flowers greenish, all similar and perfect... (6) 



a Stems erect. Flowers greenish, of two sorts, monoecious or dioecious. .. (x) 



b Seed horizontal. c Pericarp rough and corky. Calyx ribbed BETA. 2 



c Pericarp thin, in a calyx bordered all around CYCLOLOMA. 3 



< Pericarp thin, in a plain, unbordered calyx CHENOPODIUM. 4 



ft Seed vertical. d Fruit smooth, sepals distinct, mostly fleshy BLITUM. 6 



d Fruit in a veiny, wrinkled calyx. Leaves pinnatifid ROUBIEVA. 5 



d Fruit axillary to a bract, no calyx. Leaves linear CORISPKKMUM. 10 



f Fruit enclosed in a hardened calyx without bracts. Cultivated SPINACIA. 9 



z Fruit naked (no calyx) between two bracts. Leaves oval or triangular. . . ATRIPLEX. 7 



y Embryo folded, not spiral. Stems jointed, leafless SALICORNIA. 11 



y Embryo a flat spiral, horizontal. Leaves acute CHENOPODINA. 12 



y Embryo a conic spiral. Sepals appendaged. Leaves spinescent SALSOLA. 13 



1. BOUSSINGAULTIA, Kunth. MEXICAN VINE. Cal. corolla-like, 

 open, 5- or 6-partecl, with several imbricated bracts. Stig. 3, club-shaped. 

 Pericarp thin. J? Twining to the right. Leaves thick, petiolate. Flow- 

 ers in many spike-like racemes. S. America. 



B. BASELLOIDES. Leaves broadly cordate-ovate, acuminate. V- Arbors. 15f. 



2. BETA, Tourn. BEET. Cal. 5-cleft, persistent. Sta. 5. Ovary half- 

 adherent. Stig. 2. Utricle depressed, corky, enclosed in and consolidated 

 with the ribbed calyx. Herbs with fleshy roots, furrowed stems, alternate 

 leaves, and greenish, spicate flowers. 



B. vulgaris. Glabrous ; leaves large, wavy, acute both ways ; spikes in a large pani 

 cle the second year. S. Eur. Cultivated for its root, which is commonly red. 



p.C'icla. Scarcity. Leaves roughish ; root slender, whitish ; flowers in 3 n s. 



y.Rapa. Turnip Beet. Root napiform, white or red, very sweet. 



6. jnang-el-tcttrtrel. Root very large, mostly white. Cultivated for stock. 



3. CYCLOLOMA, Moquin. Calyx 5-cleft, lobes strongly keeled, at 

 length appendaged outside with a circular membranous border or crown. 

 Sta. 5, styles 3. Utricle depressed, enclosed. @ With furrowed stems, 

 alternate lobed leaves, and small sessile flowers. 



C. platypliyllum Moq. Banks of the Mississippi, 111., and W. 1 Hf, white-downy 

 above. Leaves lance-oblong, sinuate-toothed or lobed, 2'. Flowers at length in 

 ernaf panicles. July Sept. 



4. CHENOPODIUM, Tourn. PIGWEED. GOOSEFOOT. Calyx bract- 

 less, 5-cleft, lobes often keeled, never appendaged, more or less enclosing 

 the fruit. Sta. 5, styles 2. Utricle depressed, membranous, seed mostly 



