ONION FAMILY 159 



4. A. recurvatum Rydb. Bulb oblong-ovoid, 1-1. o cm. thick; scape 

 slender, 3-5 dm. high, almost terete; leaf-blades 1-2 dm. long, 1-3 mm. wide, 

 thick; involucre 2-leaved, almost 2 cm. long; petals and sepals elliptic-ovate, 

 obtuse, 5 mm. long, rose, with darker midvein. A. cernuum ohlusum Cockerell. 

 Drv hills and mountain-sides. Alta. — S.D. — N.M. — B.C. Plain — Mont. My- 

 Au. 



5. A. cernuum Roth. Bulb lance-ovoid, 1-2 cm. thick, often purplish; 

 scape 3-6 dm. high, stout; leaf-blades 1-2 dm. long, 3-7 mm. wide, rather thin; 

 involucre 2-leaved, rarely more than 1 cm. long; petals and sepals light pink or 

 white, with faint midrib, otherwise as in the preceding. On banks and hillsides: 

 N.Y. — -W.Va. — -Colo. — \^'ash. — -Sask. Plain — Subniont. Je— Au. 



6. A. neomexicanum Rydb. Bulb oblong-ovoid, 1-2 cm. thick; coats 

 membranous, only the outer slighth' fibrous; scape 3-4 dm. high, slender, terete; 

 leaf -blades narrow, 1-2 mm. wide, ahuost flat, slightly keeled; involucres very 

 small, scarceh' more than 5 mm. long; petals and. sepals oblong-ovate, nearly 

 white, with very faint midrib. Dry mountains: s Colo. — N.M. — Ariz. Sub- 

 •inont. Au-0. 



7. A. fibrosum Rydb. Bulb ovoid, about 1.5 cm. thick; scape 2-3 dm. 

 high, striate, slender; leaf-blades flat, thick, 3 mm. wide, 1-1.5 dm. long; bracts 

 2, ovate, about 1 cm. long; petals and sepals lance-oblong, obtuse, 6 mm. long. A. 

 Geyeri M. E. Jones, not S. Wats. Mountain sides and meadows: Mont. — Wyo. 

 — Ida.— (?B.C.) Suhmont.—Mont. Je-Jl. 



8. A. rubrum Osterhout. Bulb ovoid, 1.5-2 cm. thick; scape 2-3 dm. 

 high, terete; leaf-blades 7 mm. wide or less, concave; involucre 3-leaved; petals 

 and sepals ovate, obtuse, 6-7 mm. long, with strong midrib; stamens and styles 

 equalling the petals. In pastures and meadows: Colo. — s Wyo. Submoni. 

 My-Jl. 



9. A. canadense L. Bulbs ovoid, 1-2 cm. thick; scape 2-6 dm. high, 

 stout; leaf-blades 1-5 dm. long, 3-8 mm. wide, rounded on the back; involucre 

 2- or 3-Ieaved; petals and sepals obtuse, pink or white, 4-6 mm. long; filaments 

 as long as the petals. In meadows and fields: Me. — Fla. — La. — Colo. — Minn. 

 Plain. My-Je. 



10. A. aridum Rj^db. Bulbs ovoid, about 1 cm. thick, usually 2-4 together; 

 scape 1-1.5 dm. high, slender, striate; leaf -blades about 1-1.5 dm. long, often 

 equalling or surpassing the scape, about 2 mm. wide, channeled; bracts ovate, 



1 cm. long or less; sepals and petals about 6 mm. long, lance-ovate, acute; fila- 

 ments and stvie shorter than the petals. Dry hills in hard clay: Wyo. Plain. 

 J(-J1. 



11. A. Nuttallii S. Wats. Bulb solitary, ovoid, about 1.5 cm. thick; scape 

 1-3 dm. high; leaves 2-3 mm. wide, 1-1.5 dm. long; bracts 1-1.5 cm. long; petals 

 and sepals ovate or ovate-lanceolate, acute or acuminate, rose or white, 4-6 mm. 

 long; stamens shorter than the petals. Plains and prairies: S.D. — Ivans. — Ariz. 

 — Ida. Plain. My-Je. 



12. A. macropetalum Rydb. Bulb ovoid, soHtary, about 2 cm. thick; 

 leaf-blades about 2 dm. long, almost equalling the scapes, 2-4 mm. wide; scapes 



2 dm. high or more, stout, 3-4 mm. thick; bracts about 2 cm. long; petals and 

 sepals lanceolate, long-altenuate, white, with a purple or pink midrib; capsule 

 with 6 conspicuous oblong crests. Mountains: Colo. — X.M. Submont. Ap- 

 My. 



13. A. textile Nels. & Macb. Bulbs usually solitary, ovoid, 1-2 cm. thick; 

 scape slender, terete, 1-3 dm. high; leaf-blades 2-4 mm. wide, 1-1.5 dm. long; 

 bracts fully 1 cm. long; petals and sepals ovate-lanceolate, acute or acuminate, 

 4-6 mm. long; capsule with 6 .small rounded crests. A. reliculatum Fraser, not 

 Presl. Plains and dry hills: Sask. — ^N.M. — Ariz. — Alta. Plain — -Submont. 

 Ap-S. 



14. A. Geyeri S. Wats. Bulbs usually solitary, ovoid, 1.5-2.5 cm. thick; 

 scape 3-6 dm. high, rather stout; leaf-blades 2-4 mm. wide, 1-2 dm. long; bracts 

 1.5 cm. long or more; petals and sepals pink or white, ovate-lanceolate, acuminate, 



