376 CHENOPODIACEiE. (GOOSEFOOT FAMILY.) 



Synopsis. 



Tribe I. CYCIiOIiOBEj^E. — 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. ATRIPLEX. flowers monoecious. Calyx of the sterile flowers 5-parted, of the fertile 



flower none. Ovary enclosed in a pair of separate a,t length coriaceous bracts. Badicle 

 inffrior 



3. OBIONE. Bracts of the fertile flower united. Radicle superior. 



4- SALICORNIA. Flowers 3 together, lodged in excavations of the thickened joints of Ihe 

 leafless stem. 



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

 Seed horizontal. 



5. CIIEXOPODIXA. Calyx 5-parted, not kee!ed. Leaves terete, fleshy. 



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



1. CHENOPODIUM, L. Pigwekd. Goosefoot. 



Calyx .5- (rarely 3-4-) parted, braetless, 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-angled 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 

 leaves, 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, Bosc. — 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, L.) with 

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

 Cultivated grounds, Florida, and northward. July - Sept. — Stem 2° - 6° high. 

 Petioles long and slender. 



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

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

 slender, spreading, corymbose, scarcely exceeding the leaves ; seed not shining, 

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

 places, Florida, and northward. — Stem 6'- 18' high. 



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

 tifid-lobcd, with the lobes obtuse and glandular-pubescent, the upper ones 

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



