GENUS i. 



GOOSEFOOT FAMILY. 



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 by or not longer than the calyx or bractlets. 



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

 Calyx 2-s-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. Chenopodium. 



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



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

 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. Alriple.r. 



Bractlets silky-pubescent, conduplicate. 8. Eurotia. 



Calyx of both kinds of flowers 3~s-parted ; fruit ebracteolate. 9. Axyris. 



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



Leafless fleshy herbs with opposite branches; endosperm none. n. 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. Salsola. 



i. CHENOPODIUM [Tourn.] L. Sp. PL 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 2-5-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 rubrum 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. 

 Pericarp readily detached from the seed ; stem low. 

 Sepals not keeled in fruit ; stem decumbent. 

 Leaves mostly entire. 



Leaves linear to oblong, short-petioled. 

 Leaves broadly ovate, long-petioled. 



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

 Leaves oblong or ovate-oblong, entire. 

 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. 

 Leaves triangular-hastate ; calyx-lobes keeled. 

 Pericarp firmly attached to the seed. 



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



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



10. C. murale. 



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



Leaves very coarsely 2-6-toothed. n. C.hybridum. 



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



** 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. 



1. C. album. 



2. C. incanum. 



3. C. glaucum. 



C. leptophyllum. 

 C. Vulvaria. 



6. C. polyspermum. 



C. Boscianum. 

 C. Fremontii, 



9. C. urbicum. 



