WOOTON AND STANDLEY FLORA OF FEW MEXICO. 



207 



Seeds of the different species of Chenopodium were formerly collected by the Indiana, 

 ground or parched, and used in making cakes or porridge. 



C. botrys. 

 C. cornutum. 



KEY TO THE SPECIES. 



Leaves glandular, sweet-scented, pinnately lobed; embryo not 

 forming a complete ring. 

 Lobes of the leaves rounded or broadly oblong, more or less 



toothed L 



Lobes of the leaves lanceolate, entire 2. 



Leaves never glandular or sweet-scented, sinuately lobed to en- 

 tire; embryo forming a complete ring, 

 lifeaves large, 7 to 20 cm. long, with large divergent acute 



lobes; seeds 2 mm. in diameter; leaves bright green. . 3. C. hybridum 

 Leaves smaller, less than 7 cm. long, with small, obtuse or 

 acute, never divergent lobes, or entire; seeds 1.5 mm. 

 or less in diameter; leaves pale or bright green. 

 Calyx lobes not carinate; inflorescence mostly axillary, 

 shorter than the leaves; stems usually prostrate; 

 leaves elliptic-lanceolate, coarsely toothed, con- 

 spicuously whitish beneath 4. C. glaucum. 



Calyx lobes carinate ; at least the upper panicles exceed- 

 ing the leaves; stems never prostrate; leaves va- 

 rious. 

 Plants with a very strong unpleasant odor when 

 crushed; leaves triangular -hastate, like the 



stems densely mealy 5. C. watsoni. 



Plants with no strong nor disagreeable odor, odor- 

 less or nearly so; leaves various. 

 Leaves entire, linear to oblong. 



Leaves linear to narrowly oblong, acute. . . 



Leaves oblong or broadly so, obtuse 



Leaves more or less toothed, hastate, ovate or 

 triangular-ovate. 

 Plants densely mealy, appearing whitish. 

 Plants tall and stout, little branched 

 below, erect; leaves conspicu- 

 ously sinuate-toothed 



Plants low, 30 cm. high or less, densely 

 and diffusely branched, the 

 branches spreading; leaves 

 small, entire except for the has- 

 tate lobes at the base 



Plants only very slightly mealy, bright 

 green. 

 Plants stout, erect; leaves thick, con- 

 spicuously sinuate-toothed 10. C. 2)aganum. 



Plants lower, weak, often somewhat 

 decumbent; leaves thin, entire 

 except for the pair of hastate 

 lobes at the base 11. C. fremontii. 



C. leptophyllum. 

 C. oblongifolium. 



8. C. album. 



9. C. incanum. 



