37G CHENOrODIACE^E. (goosefoot family.) 



Synopsis. 



Tribe T. C YCLOIiOBEJE. — Embryo curved like a ring around the albumen. 

 1 CHENOPODIUM. Calyx 3- 5-parted, the lobes commonly keeled in fruit. Seed horizontal, 

 rarely vertical. 



2. ATUIPI.EX. Flowers monoecious. Calyx of the sterile flowers 5-parted, of the fertile 



flower none. Ovary enclosed in a pair of separate at length coriaceous bracts, Radicle 

 inferior. 



3. OBION K. BracH of the fertile flower united. Radicle superior. 



4. SALICOUNIA. Flowers 3 together, lodged in excavations of the thickened joints of the 



leafless stem. 



Tribe II. SPIROLOBEiE. — Embryo spirally coiled, with little or no albumen. 

 Seed horizontal. 

 6. CI1KNOP0DINA. Calyx 5-parted, not keeled. Leaves terete, fleshy. 

 6. SALSOLA. Calyx at length transversely wiuged. Leaves spiny. 



1. CHENOPODIUM, L. Pigweed. Goosefoot. 



Calyx 5- (rarely 3-4-) parted, bractless, the lobes mostly keeled. Stamens 



5. the filaments filiform. Styles 2-3, distinct, or united at the base. Utricle 

 depressed, enclosed in the globose or 5-anglcd calyx. Seed horizontal (rarely 

 vertical), lenticular. Embryo forming a more or less perfect ring around the 

 copious mealy albumen. — Glandular or powdery-coated herbs, with alternate 

 [eaves, and clusters of small greenish flowers disposed in panicled spikes. 



* Annuals. 



1. C. Boscianum, Moq. Stem erect, with angular branches ; leaves 

 small, spreading, lanceolate-linear, very acute, entire, or the lower ones some- 

 what toothed, more or less mealy and whitened beneath; spikes loose, leafy; 

 seed acute on the margins, slightly roughened, shining, enclosed in the acute- 

 angled calyx. — Carolina, Bos<-. — Stem slender, 2° high. Leaves 5"- 12" long, 

 on petioles 2"- 3" long. Calyx-lobes elliptical-ovate, acutish. 



2. C. album, L. Stem erect, branched, slightly furrowed , leaves ascend- 

 ing, rhombic-ovate, acute at the base, toothed; the upper ones lanceolate and 

 entire, more or less coated with a white powder; spikes panicled; the small 

 clusters scattered or crowded, nearly leafless ; seed enclosed in the 5 angled 

 calyx, acute on the margins, smooth and shining — Varies (C viride, / ..) with 



entire and less mealy leaves, and the larger clusters more scattered.— 

 ( iultivated grounds, Florida, and northward. July- Sept. — Stem 2°-G° high. 



I '. tides long and .-lender. 



3. C. muralo, L. Stem ascending, branched ; leaves long-petioled, ovate- 

 rhombic, acute, unequally and sharply toothed, bright green on both -ides ; spikes 

 slender, spreading, corymbose, scarcely exceeding the leave-: seed nol Bhining, 

 acute on the margins, nearly enclosed in me Blightly angled calyx. — Waste 



Florida, and northward. — Stem (>'- 18' high. 



4. C. Botrys, L. Stem erect, branched'; leave- oblong, somewhat pinna- 

 tifid-lobed, wiili the lobes obtuse and glandular-pubescent, the upper ones 

 minute; racemes numerous, axillary, spreading, cymose; seeds with rounded 



