GOOSEFOOT FAMILY 241 



margined, green on the back, slightly carinate; seeds black, shining, about 1 5 

 mm. in diameter. Sandy soil, fields and waste grounds: Neb. Mo N M 

 Ariz. Wash.; n Mex. Plain. Jl-S. 



4. C. desiccatum A. Nels. Stem 2-5 dm. high; leaves short-petioled; 

 blades obtuse or acutish, 1-4 cm. long, 4-10 mm. wide, thick, mealy on both 

 sides; sepals slightly carinate; seeds black, shining, 1.5 mm. broad. C. oblongi- 

 folium (S. Wats.) Rydb. C. desiccatum was described from a depauperate form 

 Arid ground: N.D. Mo. Tex. Calif. Wash. Plain Submont. Jl-S. 



5. C. aridum A. Nels. Stem erect, 3-4 dm. high; leaves moderately thick, 

 dark green; blades 1-3 cm. long, oblong to ovate-lanceolate, entire or rarely 

 slightly hastately toothed, obtuse; seeds scarcely 1 mm. in diameter, black, 

 shining. C. Wolfii Rydb. Arid ground: Colo. Wyo. Submont. Mont. Jl-Au. 



6. C. incanum (S. Wats.) Heller. Stem divaricately branched, 1-3 dm. 

 high, mealy, obtusely angled; leaf -blades rhombic or broadly ovate, hastately 

 lobed, 3-ribbed, 1-2 cm. long and nearly as broad; flowers in dense clusters; 

 sepals very mealy, slightly carinate; seeds black, shining. Dry ground, especially 

 in " prairie-dog towns:" Neb. Kans. N.M. Ariz. Utah. Plain Son. 

 My-Au. 



7. C. albescens Small. Stem erect, 5-12 dm. high, mealy when young, 

 angled; leaf -blades 2-4 cm. long, sharply acute or bristle-tipped, hastately 

 lobed or toothed, 3-ribbed; inflorescence rather lax; sepals mealy, barely keeled; 

 seed 1-1.5 mm. broad, black, shining. Dry soil: Tex. N.M. Colo. Son. 

 Submont. Je-Jl. 



8. C. Fremontii S. Wats. Stem 2-8 dm. high, with slender branches, 

 green; leaf -blades broadly triangular or rhombic, sinuate-dentate, 1-5 cm. long 

 and nearly as wide, rounded and mucronate at the apex; sepals strongty carinate, 

 nearly covering the fruit-; seed black, shining, fully 1 mm. broad. In canons 

 and among bushes: Sask. N.M. Ariz. Nev. B.C.; n Mex. Plain Mont. 

 Jl-S. 



9. C. atrovirens Rydb. Stem 3-5 dm. high, striate and obtusely angled; 

 leaf -blades broadly ovate, the upper mucronate at the apex, 3-ribbed, 1-3 cm. 

 long, 5-15 mm. wide; flowers in short dense spikes, sparingly mealy; seeds black, 

 shining, 1 mm. broad. Foot-hills: Mont. -Wyo. Nev. Submont. Jl-Au. 



10. C. inamoenus Standl. Stem erect, 1-8 dm. high, much branched; 

 petioles very short; leaf -blades 1-3 cm. long, 1-5 mm. wide, obtuse, 1-nerved, 

 thick, densely farinose, becoming glabrate above; flowers in large glomerules 

 in dense erect paniculate spikes; sepals ovate, slightly carinate; seeds 0.8 mm. 

 broad, black, shining. Dry places: Wyo. N.M. -Nev. Ore.; n Mex. Au-S. 



11. C. hians Standl. Stem 4-8 dm. high, copiously mealy; petioles half 

 as long as the leaf-blade or shorter; blade 1.2-3 cm. long, rounded and short- 

 apiculate at the apex, green above, densely white-mealy beneath; flowers in large 

 glomerules in paniculate spikes; sepals rounded-oblong or ovate, obtuse, obtusely 

 carinate, mealy; seeds black, 1 mm. broad, shining. Dry hillsides: N.M. 

 Wyo. Au. 



12. C. Watsoni A. Nels. Stem stout, 2-6 dm. high; leaf-blades 1-2 cm. 

 long, oval, ovate, or oblong, obtuse, dark green and sparingly mealy; inflorescence 

 narrow, dense; seed 1.25-1.5 mm. in diameter. C. olidwn S. Wats. Dry places: 

 Mont. N.M. Ariz. Son Mont. Au-O. 



13. C. Berlandieri Moq. Stem erect, 3-9 dm. high, much branched; leaf- 

 blades lanceolate, oblong, or ovate, sometimes somewhat rhombic, 1.5-4 cm. 

 long; inflorescence open, interrupted, lax; sepals barely keeled; seeds black, 

 punctate. Dry soil: N.C. Fla. Tex. Colo.; n Mex. Plain Mont. Jl-S. 



14. C. lanceolatum Muhl. Stem 4-12 dm. high, branched, blunt-angled; 

 lower leaf-blades ovate or lanceolate, coarsely toothed, those of the inflorescence 

 linear-lanceolate, entire; inflorescence open and interrupted; sepals merely 

 keeled; seeds black, shining. C. viride Auth., not L. Waste places and fields: 

 Mass. Fla. La. Sask.; B.C. Plain. Jl-S. 



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