ONION FAMILY 159 



4. A. recurvatum Rydb. Bulb oblong-ovoid, 1-1.5 cm. thick; scape 

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

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

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

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



Bulb lance-ovoid, 1-2 cm. thick, often purplish; 



Au. 



cernuum 



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 hillsuies: 

 N.Y.—W.Va.— Colo.— Wash.— Sask. Plain— Sub mouL Je-Au. 



Bulb oblong-ovoid, 1-2 cm. thick; coats 



neomexicanum 



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

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

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

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



2-6 



7. A. fi^rosSm Ilydb.\ 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.— W yo. 

 — Ida.— (? B.C.) Subtnont.—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. Submont. 



My-Jl. 



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



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

 2- or 3-leaved; petals and sepals obtuse pink or ^J^'te, 4-6 mm. long; filaments 

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



Plain. ;My-Je. 



10. A. aridum Rydb. 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 ^°'?f' 1\? 

 equaUing or surpassing the scape, about 2 mm. .^ide, channeled; bracts ova e, 



1 cm. long or less; sepals and petals about 6 mm long lanceK)vat^ acute fila- 

 ments and style shorter than the petals. Dry hills m hard clay: Wyo. Plain. 



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.-Kans.-Anz. 



—Ida. Plain. My-Je. . . o ^u- i 



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



leaf-blades about 2'^dm. long, ahnost equaUing the ^ff' 2;1°;^- ^'ide;^^^^^^ 



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

 fepSs lanceolate, long-attenuate, white, mth a purple or pink midr^; capsuk 

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



^1^ A textile Nels & Macb. Bulbs usuaUy soUtary, ovoid, 1-2 cm. thick; 

 .cane ^lender terefe 1-3 dm. high; leaf-blades 2-4 mm. ^ide, 1-1.5 dm. long; 

 Sts^Sufl cm.1ong; petals an\Wpals ovate4ance6late acut^^^^^ 

 4-6 mm long- capsule with 6 small rounded crests. A. reiiculatum 1 raser, not 

 Sesl PlS'and dry hills: Sask.-N.M.-Ariz.-Alta. Pla^nS^AmonL 



^li A Geyeri S. Wats. Bulbs usually solitary, ovoid 15-2.5 cm. thick; 



scape 3-6 din high, rather stout; leaf-blades 2-4 mm. ^^'lde 1-2 dm. long; bracts 

 scape o u um. uLyn, ^'*<- ; „.u;fp o-i/.<itfvlanceolate. acummate. 



X. 3tJ. ' 



