ORDER 106. CHEXOPODIACEiE. 



285 



1. Flower of Chenopodium 

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

 moved, showing the ovary and 

 2 stamens. 3. Seed cut across, 

 showing the coiled embryo. 

 4. Branch of SaMcornia herba- 

 cea. 5. Two joints magnified. 

 6. Ovary of a flower. 



$ l.evp Hnt. neither Hshy imr spiny. Embryo a rinjj around copious albumen ... (o 



I [,e ves none, or linear nnd fleshy or spinescent. Embryo a spiral or folio. Albumen 0. ..(y) 



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



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



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



h Seed horizontal. r Pericarp rough and corky. Calyx ribbed BETA. J 



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



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



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



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



d Frnit axillary to a hract, no calyx. Leaves linear OORISPKRMUM. 10 



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



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



y Embryo folded, not spiral. Stems jointed, leafless SAI.ICOR.MA. 11 



y Embryo a flat spiral, horizontal. Leaves acnte OHENOPODINA. 12 



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



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

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

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

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



H. BASELLOIDES. Leaves broadly cordate-ovate, acuminate, y. 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. vnlgaris. Glabrous ; leaves large, wavy, acnte both ways ; spikes in a large pan! 



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



p.&cla. Scarcity. Leaves ronghish ; root slender, whitish ; flowers in JTs. 



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



S.JUang'el-uiurtfel. 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. 

 Sla. 5, styles 3. Utricle depressed, enclosed. With furrowed stems, 

 alternate lobed leaves, and small sessile flowers. 



r. platj pliyllum Moq. Banks of the Mississippi, 111., and W. 1 IJf, white-downy 

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

 small 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 



