114 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, t. 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. Geayia. 

 Pericarp densely hairy, conical ; low and tomentose shrubs. 



8. EUROTIA. 



Stems and branches fleshy, jointed; leaves scale-like. 11. Salicoenia. 



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. 1 4. Salsola. 



Fruiting calyx not winged; leaves fleshy, not spiny. 13. Dondia. 



I. 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. ji. C. leptophyllum. 



Leaves thick, oblong; inflorescence dense and crowded. 

 Plant densely mealy, yellowish. 



Plant tall with nearly erect branches. 2. C. oblongi folium. 



Plant low with spreading-ascending branches. 



3. C. desiccatum. 

 Plant only slightly mealy, dark green. 4. C. WoKi. 



Leaves broadly ovate or triangular, more or less hastate at the base. 

 Plant densely mealy ; leaves rather thick. 



Plant low and spreading. 5. C. incanum. 



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 i dm. high, erect ; leaves usually more or less toothed, 



13. C. rubrum. 



