Genus i. 



GOOSEFOOT FAMILY. 



horizontal ; endosperm meal)', 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 Saliconna and Kochia). 



Leafy herbs ; endosperm copious. 



Fruit enclosed by or not longer than the calyjt 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 liut slightly fleshy in fruit : flowers mostly in panicled spikes. 



1. Ckenopodiiim. 



2. Ronhieva, 



3. Bliliim. 



Fruiting calyx dry, strongly reticulated ; leaves pinnatifid. 

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

 Fruiting calyx horizontally winged. 



Endosperm mealy ; leaves sinuate-dentate. 

 Endosperm none ; leaves linear, entire. 

 Calyx of I sepal ; stamen i. 

 Flowers monoecious or dioecious. 



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

 Bractlets flat or convex, not silky. 

 Bractlets silky-pubescent, conduplicate. 

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

 Fruit much exserted beyond the i-sepaled caly.x ; flowers perfect. 

 Leafless fleshy herbs with opposite branches ; endosperm none. 



** 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. 



Cycloloiiia. 



Kochia, 



Monolcpis. 



Alriple.v, 



Eitrotia. 



Axyris. 



Corispermun 



Salicornia. 



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



Annual or perennial, grocii 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-Iobed, 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 nthrum 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 : caly.x 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. rubnim. 



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



Leaves broadly triangular-hastate, entire or merely undulate. 13. C. Boiuis-Hcitricus. 



** 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. ghiiicnm. 



C. Icptophyllum. 

 C. I'uh'ani], 



6. C. polyspeniium. 



C, Boscianum, 

 C. Fremontii. 



9. C. urbicum. 



