WOOTON AND STANDLEY FLORA OF NEW MEXICO. 



207 



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

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



( '. botrys. 

 C. cornutum. 



:'>. < '. hybridum. 



KEY TO THE SPECIES. 



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

 forming a complete ring. 

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



toothed 1. 



Lobes of the leaves lanceolate, entire 2. 



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

 tire; embryo forming a complete ring. 

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



lobes; seeds 2 mm. in diameter; leaves bright green. 

 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 



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 6 



Leaves oblong or broadly so, obtuse 7 



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, out ire except for the has- 

 tate lobes at the base 



Plants only very slightly mealy, bright 

 green. 



Plants Btoul 



< '. watsoni. 



( '. leptophyllum. 

 ( '. oblongifolium. 



8. C. album. 



. '.). < '. ineanw 



ereel ; leaves thick, con- 

 [ picuously sinuate-toothed 1". C. paganum. 



Plants lower, Weak, often Somewhat 



decumbent; leaves thin, entire 



except for tho pair of ha > 



lobes at the base 11. < '.fremontii. 



