Genus i. GOOSEFOOT FAMILY. 9 



horizontal; endosperm mealy, fleshy or wanting; embryo partly or completely 

 annular or conduplicate, or spirally coiled. 



About 75 genera and 550 species, of wide geographic distribution. 



* Embryo annular or conduplicate, not spirally coiled; endosperm copious 

 (except in Salicorma and Kochia). 

 Leafy herbs ; endosperm copious. 



Fruit enclosed Ijy or not longer than the calyx or bractlets. 



Flowers perfect or some of them pistillate; calyx herbaceous or fleshy. 

 Calyx 2-5-lobed or 2-5-parted ; stamens 1-5. 



Fruiting calyx wingless, its segments often keeled. 



Calyx herbaceous or but slightly fleshy in fruit ; flowers mostly in panicled spikes. 



I. Clienopodium. 

 Fruiting calyx dry, strongly reticulated ; leaves pinnatiiid. 2. Roubieva. 



Calyx very fleshy and bright red in fruit ; flowers densely capitate. 3. Blitiim, 

 Fruiting calyx horizontally winged. 



Endosperm mealy ; leaves sinuate-dentate. 4. Cycloloma. 



Endosperm none ; leaves linear, entire, 5, Kochia. 



Calyx of I sepal ; stamen i. 6. Monolepis. 



Flowers monoecious or dioecious. 



Calyx of pistillate flowers none ; fruit enclosed by 2 bractlets. 



Bractlets flat or convex, not silky. 7. Atriplex, 



Bractlets silky-pubescent, conduplicate. 8. Eitrotia. 



Calyx of both kinds of flowers 3-5-parted ; fruit ebracteolate. 9. Axyiis. 



Fruit much exserted beyond the i-sepaled calyx; flowers perfect. 10. Corispermum. 



Leafless fleshy herbs with opposite branches; endosperm none. 11. Salicornia. 



** Embryo spirally coiled; endosperm little or none. 



Shrub ; flowers monoecious, not bracteolate. 12. Sarcobatus. 

 Herbs ; flowers perfect, bracteolate. 



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



Fruiting calyx bordered by a thin horizontal wing; leaves very spiny. 14. Salsota. 



I. CHENOPODIUM [Toum.] L. Sp. PI. 218. 1753. 



Annual or perennial, green and glabrous, white-mealy or glandular-pubescent herbs, with 

 alternate petioled entire sinuate-dentate or pinnately lobed leaves. Flowers very small, 

 green, perfect, sessile, bractless, clustered in axillary or terminal, often panicled or com- 

 pound spikes. Calyx 2-5-parted or 2-s-lobed, embracing or enclosing the utricle, its seg- 

 ments or lobes herbaceous or slightly fleshy, often keeled or ridged. Stamens 1-5; filaments 

 filiform or slender. Styles 2 or 3 ; seed horizontal or vertical, sometimes in both positions 

 in different flowers of the same plant, firmly attached to or readily separable from the 

 pericarp; endosperm mealy, farinaceous; embryo completely or incompletely annular. 

 [Greek, goose-foot, from the shape of the leaves.] 



About 60 species, mostly weeds, of wide geographic distribution. Besides the following, some 

 5 others occur in the western parts of North America. Type species : Chenopodium ntbnim L. 



* Embryo a complete ring; plants not glandular. 



Leaves white-mealy on the lower surface (except in some races of No. i). 

 Leaves or some of them mostly sinuate-toothed or lobed. 

 Sepals strongly keeled in fruit. 



Pericarp firmly attached to the seed ; stem erect, tall. i, C. album. 



Pericarp readily detached from the seed ; stem low. 2. C. incanum. 



Sepals not keeled in fruit ; stem decumbent. 3. C. glaiictim. 



Leaves mostly entire. 



Leaves linear to oblong, short-petioled. 4. C. leptophyUum. 



Leaves broadly ovate, long-petioled. 5. C. Vulvaria. 



Leaves green and glabrous or nearly so on both surfaces when mature. 



Leaves oblong or ovate-oblong, entire. 6. C. polyspermuin. 



Leaves, at least the lower, sinuate, toothed or incised. 

 Stamens 5 ; calyx not fleshy. 



Pericarp readily separable from the seed. 



Leaves oblong or lanceolate; calyx-lobes scarcely keeled. 7. C.Boscianum. 



Leaves triangular-hastate; calyx-lobes keeled. 8. C. Fremonlii. 



Pericarp firmly attached to the seed. 



Flower-clusters, at least the upper, longer than the leaves. g. C. urbicum. 



Spikes loosely panicled in the axils, the panicles shorter than the leaves. 



10. C. nntrale. 

 Stamens only i or 2 ; calyx slightly fleshy, red. 12. C. rubntm. 



Leaves very coarsely 2-6-toothed. 11. C.hybridnm. 



Leaves broadly triangular-hastate, entire or merely undulate. 13. C. Bonus-Henrictis. 



** Embryo an incomplete ring; plants glandular aromatic. 

 Leaves ovate or oblong, pinnately lobed; flowers in long loose panicles. 14. C.Botrys. 



Leaves lanceolate ; flowers in continuous or interrupted spikes. 15. C. ambrosioides. 



