120 American Midland Naturalist Monograph No. 2 



6. Pericarp firmly adherent to the seed. 

 8. Leaves more or less sinuately dentate. 



9. Leaves commonly densely farinose on the lower surface; seed 

 1-L2 mm. in diameter; cult, ground and waste places, com- 

 mon; nat. from Eur. July-Sept. Lamb's Quarter 



C. album L. 



9. Leaves green and glabrous on both surfaces. 



10. Leaves lanceolate to rhombic-ovate; seeds 1.5-1.7 mm. in 

 diameter; stem 1-3 m. tall; plants often purplish in 

 autumn; fields and roadsides, common; nat. from Eur. 



June-Oct. [C. missouriense Aellen} 



C. paganum Reichenb. 



10. Leaves triangular-ovate or somewhat deltoid-hastate, often 

 truncate at base; seed 1 mm. in diameter; stem 30-90 

 cm. tall; waste places, occasional; nat. from Eur. July- 

 Sept. City Goosefoot C. urbiaim L. 



8. Leaves small, entire, or merely hastately toothed, the upper ones 

 smaller, elliptical, cuspidate; seed puncticulate, 1 mm. in diam- 

 eter; dry soil. July-Sept C. berlandieri Moq. 



5. Sepals only slightly or not at all keeled. 



11. Leaves bright green on both surfaces; seeds 1-1.5 mm. in diameter. 



12. Leaves rhombic-ovate, coarsely toothed; stem slender, erect or 

 decumbent, 30-60 cm. long; seeds sharp-edged; waste places, 



nat. from Eur. July-Oct. Nettle-leaved Goosefoot 



C murale L. 



12. Leaves broadly triangular-hastate, entire or nearly so, 5-12 

 cm. long; stem stout, erect; seeds obtuse-edged; waste 



places, nat. from Eur. July-Oct. Good-King-Henry 



C. bonus-henricus L. 



11. Leaves pale green, sinuate-margined, 1-3 cm. long, the lower sur- 

 face whitish-mealy; stem low, spreading or prostrate; seeds 

 6-0.8 mm. in diameter, sharp-edged; waste places, nat. from 

 Eur. July-Sept. Oak-leaved Goosefoot C. glaucum L. 



4. Leaves sharply divaricately lobed or coarsely few-toothed, thin, large, 

 green, glabrous; sepals slightly keeled, incompletely covering the 

 seed; pericarp firmly adherent; seed 1.5-2 mm. in diameter; fields, 

 woods, or waste ground, nat. from Eur. July-Sept. [C. gigantosper- 

 mum Aellen] C. hybridum L. 



2. KoCHiA Roth 



K. scoparia (L.) Schrad. Summer Cypress. Frequently cultivated, and 

 occasionally spontaneous in waste ground or along roads; introd. from Eur. 

 July-Sept. 



3. Cycloloma Moq. 



C. atriplicijoltum (Spreng.) Coult. Winged Pigweed. Sandy soil, local. 

 July-Aug. 



