310 CHENOPODIACE^E. (goosefoot family.) 



4- -t- Bracts small, ovate-oblong, truncate, usually few-toothed. 



3. A. saeearia, Watson. Low (3 to 5 inches high), diffusely branched, 

 densely scurfy : leaves subcordate-ovate, very shortly petioled or sessile : flowers 

 axillary : bracts pedicelled and often deflexed, the truncate summit entire or 

 suberose. — Loc. cit. 112. S. Wyoming (Dr. Gray). 



4. A. Wolfli, Watson. Low, branching, scurfy-canescent and reddish : 

 leaves linear, sessile: flowers very small, in androgynous axillary clusters: 

 bracts sessile, 3-toothed. — Loc. cit. Central Colorado ( Wolf). 



-t- 4- 4- Bracts orbicular, tooth-crested, with an acuminate foliaceous apex. 



5. A. Powellii, Watson. Erect, slender, grayish : leaves lanceolate, 

 entire or subdenticulate : flowers androgynous, axillary : bracts with a broad 

 terminal entire lobe, the margin below it gash-toothed, the sides doubly or 

 triply tooth-crested. — Loc. cit. S. W. Colorado and Arizona. 



4-4-4-4- Bracts rhombic-orbicular, indurated, usually conspicuously appendaged 

 and the foliaceous margin toothed and undulate: leaves triangular and subhas- 

 tate, the lower opposite. 



6. A. argentea, Nutt. Diffusely branched and leafy, grayish scurfy or 

 nearly glabrous : leaves petioled: male spikes short and dense : bracts shortly- 

 pedicelled. — Obione argentea. From Colorado to the Upper Missouri and N. 

 E. California. 



7. A. expansa, Watson. Like the last, but stouter, more divaricately 

 and distantly branched, with thinner leaves, sessile, and the male spikes elongated, 



slender and leafless toward the apex Loc. cit. 116. S. Colorado and New 



Mexico to S. California. 



# * * Perennials, shrubby, densely appressed-scurfy. 

 *■■ Bracts with a toothed margin and the sides muricate. 



8. A. Nuttallii, Watson. Branching from the shrubby base : leaves 

 oblong-spatulate to narrowly oblanceolate, entire : bracts ovate, strongly con- 

 vex, united, the sides more or less crested. — Loc. cit. 116. A. canescens, 

 Nutt. Obione canescens, Moq. From Colorado to N. Nevada and the Sas- 

 katchewan. 



4- 4- Bracts with free dilated entire margins, thick and scurfy, and the sides not 



muricate. 



9. A. confertifolia, Watson. Diffusely-branched, somewhat spinescent: 

 leaves ovate to obovate, cuneate at base, entire : flower clusters small, axillary : 

 bracts cnneate-orb'cular, united at base. — Loc. cit. 119. Obione confrrtifolia, 

 Torr. From S. Idaho and Wyoming to New Mexico and southward. 



4-4-4- Bracts connate and indurated, not scurfy or muricate, with 4 distinct 

 broadly dilated wings. 



10. A. canescens, James. Leaves oblanceolate to narrowly oblong oi 

 linear, entire : flowers mostly dioecious, in panicled spikes : the bracts form- 

 ing a thick and indurated body, shortly pedicellate and with a narrow bifid 

 apex, the broad wings somewhat decurrent upon the pedicel. — Watson, loc 

 cit. 120. From N. Nevada to Colorado, New Mexico, and S. California. 



