Chenopodium. . CHENOPODIACE^. 133 



Division 2, SpiKOLODEiE. Embn/o spiral. 

 Tribe 4. SUEDINEiE. Embryo in a flat spiral. Sceils with a double integument. 



8. SciD*. Calyx urceolate, 5-parted, usually baccate in fruit, not appcndiculate. Styles united. Seed vertical or 



horizontal. 



Tribe 5. SALSOLE.^. Embryo in a conical ejiiral. Seeds with a single integument. 



9. Salsola. Calyx with a winged border when in fruit. Stamens inserted into a hypogynouB disk. Scales none. 



Seed horizontal. 



Division 1. CYCLOLOBEjE. C. A. Meyer. 



Embryo curved into a mure or less complete ring, around a copious {seldom scanty) central 



albumen. — Leaves usxially dilated, flat. 



Tribe I. ANSERINEjE. Moq.-Tand. 



Flowers perfect, without bracts. Fruit an utricle or achenium, rarely somewhat baccate. 

 Seed vertical or horizontal, with a double integument. Embryo nearly or quite annular, 

 — Leaves usually more or less triangular-rhomboid. 



I. CHENOPODIUM. Linn.; Moq.-Tand. Chenop. p. 20. GOOSEFOOT. PIGWEED. 



[So named from the Greek, chcn, chcncs, a goose, and pons, a foot ; in allusion to the shape of the leaf in some species.] 



Calyx 5-parted, not becoming succulent, closed upon the fruit but not wholly covering it, 

 without appendages. Utriculus depressed. Stamens 5. Seed horizontal, lenticular. 

 Embryo perfectly annular. — Herbs or rarely undershrubs, often sprinkled with a mealy or 

 scaly powder. Leaves mostly petiolate and triangular-rhomboid or hastate, toothed or entire. 



1. Chenopodium album, Linn. Goosefoot. LainU s-quarters. 



Stem herbaceous, erect, branched; leaves rhomboid- ovate, entire and obtusely cuneate 

 at the base, coarsely sinuate-toothed, pale underneath , the uppermost oblong or narrowly 

 lanceolate, and nearly or quite entire ; racemes paniculate, somewhat spiked, often nearly 

 leafless ; segments of the calyx prominently keeled ; seeds smooth and shining, acute on the 

 margin.— Xmn. sp. 1. p. 219 ; Engl. bot. t. 1723 ; Pursh, fl. \. p. 198 ; Ell. sk. \.p. 330 ; 

 Bigel. fl. Bost. p.\(n ; Torr. fl. 1. p. 294 ; Beck, bot. p. 29G ; Darlingt. fl. Cest. p. 17G; 

 Moq.-Tand. Chenop. j). 29. 



Annual. Stem 2-5 feet high, pyramidally or paniculately branched, angular and grooved. 

 Leaves 2-3 inches long, rather fleshy, strongly 3-nerved ; the under surface (and partly also 

 the upper) covered with very minute whitish cup-hke scales. Flowers in roundish clusters, 

 which are collected in spiked panicles. Calyx green, depressed, 5-angled ; the segments 

 roundish, inflexed. Seeds nearly black. 



Gardens, waste grounds, etc. Introduced from Europe. July - September. Sometimes 

 the leaves are more entire, when it appears to be the C. viride of Linnaeus. 



