29 



5a. Principal leaves with a broad truncate, rounded, or hastate base 



6. 

 5b. Principal leaves narrowed to the base 12. 



6a. Leaves broadly ovate, with 1 4 large sharp projecting teeth 

 on each side Goosefoot, Chenopodium hybridum. 



6b. Leaves hastate or triangular-ovate, entire or with many 

 teeth 7. 



7a. Leaves entire or merely undulate 8. 

 7b. Leaves sharply or sinuately toothed 9. 



8a. Stem erect, simple or sparingly branched 



Good King 1 Henry, Chenopodium bonus-henricus. 

 8b. Stem diffuse or ascending, freely branched 



Orache, Atriplex patula* 



9a. Flowers in small heads, in the axils or in terminal spikes; leaves 

 sinuately toothed or nearly entire 



Strawberry Blite ? Chenopodium capitatum. 



9b. Flowers in terminal panicles; leaves sharply toothed (Goose- 

 foot) 10. 



lOa. Panicles short, not as long as the subtending leaves 



Goosefoot, Chenopodium murale. 



lOb. Panicles long, exceeding the subtending leaves 11. 



lla. Calyx green Goosefoot, Chenopodium urbiciim. 



lib. Calyx red Goosefoot, Chenopodium rubrum. 



12a. Foliage glandular and strongly aromatic 13. 

 12b. Foliage not glandular nor aromatic;, sometimes ill- 

 scented 15. 



13a. Flowers in large loose open spreading panicles; leaves deeply 

 pinnatifid Jerusalem Oak, Chenopodium botrys. 



13b. Flowers clustered in slender axillary or terminal spikes 14. 



14a. Spikes dense, leafy 



Mexican Tea, Chenopodium ambrosioides. 

 14b. Spikes open, nearly leafless 



Wormseed, Chenopodium ambrosioides yar. anthelminticum. 



15a. Stem erect, 5 20 dm. tall; leaves frequently white-mealy 



Lamb's Quarters, Chenopodium album. 



15b. Stem , prostrate or ascending, succulent; leaves glaucous-white 

 beneath Goosefoot, Chenopodium glaucum. 



15c. Stem widely and diffusely branched; leaves green, soon decidu- 

 ous Cycloloma, Cyeloloma atriplicifolium. 



