376 



( III.NOPODIACE^E. (GOOSEFOOT FAMILY.) 



Synopsis. 



Tribe T. CYCI1OL.OBEJE. — Embryo'curvcd like a ring around the albumen. 



1 CHINOPODIUM. Calyx 3 - 5-partcd, the lobes commonly keeled in fruit. Seed horizontal, 



rarely vt>rt'u\il. 



2. ATRIIM.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. Bracts of the fertile flower united. Radicle superior. 



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

 leafless stem. 



Tribe IT. SPIROLOBE/E. 



Seed horizontal. 



Embryo spirally coiled, with little or no albumen. 



6. CIIENOPODINA. Calyx 5 parted, not keeled. Leaves terete, fleshy. 

 6. SALSOLA. Calyx at length transversely winged. 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-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 spike's. 



* Annuals. 



1. C. Boscianum, M.oq. 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, Base. — Stem slender, 2° high. Leaves 5"- 12" long, 

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



2. C. alburn, 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 

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

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

 Petioles loni: and sIcimK r. 



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

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

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

 acute 011 the margins, nearly enclosed in the slightly angled calyx. — Waste 

 places, Florida, and northward. — Stem G'- 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, cymosc ; seeds with rounded 



