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CHENOPODIACEAE. 
Flowers monoecious or dioecious; the pistillate inclosed in two accrescent 
bractlets. 
Pericarp not hairy. 
Bracts compressed, i. e., with one side towards the axis; leaves more or 
less farinose; testa mostly coriaceous. 5. Atriplex. 
Bracts ob-compressed, i. e., with one edge towards the axis; testa mem¬ 
branous. 
Pericarp hastate with crested margins, 2-toothed apex; more or less 
farinaceous herbs with toothed leaves. 6. Suckleya. 
Pericarp obovate or orbicular, entire; undershrubs with entire leaves. 
7. Grayia. 
Pericarp densely hairy, conical; low and tomentose shrubs. 
8. Eurotia. 
Stems and branches fleshy, jointed; leaves scale-like. 11. Salicornia. 
Embryo spirally coiled. 
Shrubs with monoecious bractless flowers; staminate flowers in spikes, without 
perianth; pistillate ones solitary, axillary; fruiting calyx transversely winged. 
12. Sarcobatus. 
Herbs with perfect bracteolate flowers. 
Fruiting calyx transversely winged; leaves spiny. 14. Salsola. 
Fruiting calyx not winged; leaves fleshy, not spiny. 13. Dondia. 
1. CHENOPODIUM L. Goosefoot, Lamb’s Quarters, Pig-weed. 
Leaves more or less mealy or glabrate, never glandular or sweet-scented, sinuately 
lobed, dentate or entire; embryo forming a complete ring. 
Stamens 5 ; calyx not at all fleshy in fruit. 
Leaves entire or sinuately toothed, but not with large, divaricate teeth ; seeds 
1—1.5 mm. in diameter. 
Calyx lobes carinate ; at least the upper panicles exceeding the leaves. 
Pericarp easily separating from the seeds. 
Leaves linear or oblong, entire or slightly sinuately toothed. 
Leaves thin, linear; inflorescence not very dense; spikes somewhat 
interrupted below. 1. C. leptophyllum. 
Leaves thick, oblong; inflorescence dense and crowded. 
Plant densely mealy, yellowish. 
Plant tall with nearly erect branches. 2. C. oblongifolium. 
Plant low with spreading-ascending branches. 
3. C. desiccatum. 
Plant only slightly mealy, dark green. 4. C. Woldi. 
Leaves broadly ovate or triangular, more or less hastate at the base. 
Plant densely mealy ; leaves rather thick. 
Plant low and spreading. 5. C. incanmn. 
Plant tall and erect. 6. C. albescens. 
Plant sparingly mealy; leaves very thin. 7. C. Fremontii. 
Pericarp firmly attached to the seed. 
Leaves subentire or merely hastately toothed. 
Leaves thick, more or less mealy; none of them cuspidate. 
8 . C. Watsonii. 
Leaves thin, glabrate, all or the upper usually cuspidate. 
9. C. Berlandieri. 
Leaves more or less sinuately dentate; inflorescence dense. 
10. C. album. 
Calyx lobes not carinate; panicles mostly axillary, shorter than the leaves. 
11. C. glaucum. 
Leaves with large divergent acute lobes ; seeds about 2 mm. in diameter. 
12. C. hybridum. 
Stamens 1-2 ; calyx reddish and slightly fleshy in fruit. 
Plant usually over 1 dm. high, erect; leaves usually more or less toothed. 
13. C. rubrum. 
