376 cnEXoroDiACEiE. (ooosefoot family.) 



Synopsis. 



Tribe I. CYCLOLiOBE^'E. — Embrjo rurved like a ring nround the albumon. 

 1 CIIEXOPODIUM. Calyx 3 -6-parted, the lobes commonly keeled in fruit. Seed horizontal, 



rarely Vfrtii-al. 

 2. ATIIII'LTX. Flowers monoerious. Calyx of the pforile flowers 5 parted, of the fertile 



fl.v.vcr I oi.o. Ovary enclosed in a pair of separate at length coriaceous bracts. Iladicle 



ii.fc: ior 

 8. OBION E. Bniet-i of the fertile flower united. Kadide superior. 



4. SALICOKNIA. Flowers 3 totjethcr, lodged in excavations of the thickened joints of the 



leafless s:em. 



Trtbe II. SPIROI.OBE.a3. — Embryo spirally coiled, with little or no albumen. 

 Sc<>d horizontal. 



5. CIIENOPODIN.V. Calyx Sparted, not keeled. Leaves terete, fleshy. 



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



1. CHENOPODIUM, L. Pigweed. Goosefoot. 



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

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

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

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

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

 leaves, and clusters of small greenish flowers disposed in pauided spikes. 



* Annuals. 



1. C. Boseianum, INfoq. Stem erect, with angular branches; leaves 

 small, spreading, lauccolato-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 acutc- 

 anglcd 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, rliombie-ovate, acute at tlie base, toothed ; the ujtper ones lanceolate and 

 entire, more or less coated with a white powder; sjjikes panidcd; the small 

 clusters scattered or crowded, nearly leafless ; seed enclosed in the ."i-angled 

 calyx, acute on the margins, smootli and shining. — Varies (C viridc, L.) with 

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

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

 Petioles long and slender. 



3. C. murale, T>. Stem ascending, branched ; leaves long-pctioled, ovato- 

 rhombic, acute, une(]ually aii<l sharply toothed, brigiit green on both sides ; spikes 

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

 aeut6 on the margins, nearly enclosed in the slightly angled calyx. — VViusto 

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



4. C. Botrys, !.<■ Stem erect, branched ; leaves oblong, somewhat pinna- 

 tifid-lobed, >*ith the lobes obtuse and ghmdular-pubesccnt, the upper ones 

 minute; rac.einea numerous, axillary, spreading, cymose ; seed.s with rounded 



