158 ALLIACEAE 



Petals and sepals abruptly acuminate, only slightly longer than the sta- 

 mens. 17. A. cuspidatum. 

 Petals and sepals obtuse, delicately denticulate below with spreading papillae. 



18. A. similUmum. 

 Petals entire, neither serrulate nor denticulate. 



Ovary and capsule crestless or indistinctly 3-crested. 

 Petals and sepals obtuse or barely acutish. 



Leaves much longer than the scape. 18. A. similUmum. 



Leaves shorter than the scape. 19. A. scillioides. 



Petals and sepals acute or acuminate. 



Stamens exserted. 20. A. incisum. 



Stamens included. 



Reticulations of the bulb-coat irregular, narrow, with curved sides; 



the outer coat in age becoming fimbrillate. 20. A. fibrillum. 

 Reticulations of the bulb-coat trapezoid, or elongated pent- or hex- 

 agonal; the sides not strongly curved: no fimbrillae. 

 Sepals and petals neither gibbous at the base, nor keeled on the 



back. 

 Involucres 3-leaved; petals and sepals little exceeding the 



stamens. 22. A. tribracteatum. 



Involucres 2-leaved; petals and sepals at least half longer 



than the stamens. 

 Petals and sepals half longer than the stamens; pedicels 



8-15 mm. long. 23. A. Diehlii. 



Petals and sepals twice as long as the stamens ; pedicels 



about 4 mm. long. 24. A. minimum. 



Sepals and petals gibbous at the base and more or less keeled 



on the back below. 

 Scape flattened; leaf-blades 5-8 mm. wide. 



Scape much exceeding the leaves in length; stamens 

 about equalling the petals and sepals. 



25. A. Douglassii. 

 Scape low, often exceeded by the leaves; stamens much 



shorter than the petals and sepals. 

 Stamens two-thirds as long as the sepals; capsule 



scarcely crested. 26. A. Tolmiei. 



Stamens half as long as the sepals; capsules with 3 



small crests. 27. A. Cusickii. 



Scape not flattened ; leaf-blades 2-4 mm. wide. 



Petals about twice as long as the stamens; capsule not 



crested. 28. A. Brandegei. 



Petals barely exceeding the stamens; capsule with minute 



thick crests. 29. A. Nivii. 



Ovary and capsule distinctly 6-crested. 



Stamens and styles exserted; petals and sepals acute or obtuse. 



30. A. stellatum. 

 Stamens and styles not exserted; petals and sepals acuminate. 



Leaves more than one. 



Reticulations of the bulb-coats sinuate; leaves shorter than the 



scape. 

 Bulb-coat thin, faintly reticulate; leaves 4-10 mm. wide. 



31. A. bisceplum. 

 Bulb-coat thick, strongly reticulate; leaves 1-3 mm. wide. 



32. A. Palmeri. 

 Reticulations of the bulb-coats straight; leaves longer than the 



scapes. 33. A. pleianthum. 



Leaves solitary, longer than the scape. 



Petals and sepals long-acuminate, nearly twice as long as the 



stamens. 34. A. cristatum. 



Petals and sepals acute or short-acuminate, slightly longer than 



the stamens. 35. A. nevadense. 



1. A. sibiricum L. Bulb small, oblong-ovoid, often oblique, about 1 cm- 

 thick; scapes 3-6 dm. high; leaf -blades 6-20 cm. long; bracts usually 2, ovate, 

 about 2 cm. long; petals and sepals bright rose-colored, with dark midrib, fully 

 1 cm. long, lanceolate, acuminate; stamens included; capsule not crested. Rich 

 soil: Me. N.Y. Colo. Ore. Alaska; Asia. Plain Mont. Je-Au. 



2. A. validum S. Wats. Bulb 2-4 cm. thick; scape 3-7 dm. high, stout; 

 leaves 2-4 dm. long, 4-12 mm. wide; bracts 2-4, ovate, about 1.5 cm. long; 

 sepals and petals dark rose-colored, 7-8 mm. long; capsule subglobose. Meadows : 

 Wash Ida Nev. Calif. Mont. Jl-Au. 



3. A. brevistylum S. Wats. Bulbs obliquely elongate, lance-ovoid, 1-3 

 cm. thick; scape 3-6 dm. high, stout; leaf-blades 1.5-3 dm. long, 4-6 mm. wide, 

 flat; bracts usually solitary, ovate, 1.5-2 cm. long; sepals and petals dark rose, 

 lanceolate, 8-10 mm. long. Rich meadows and open woods: Mont. Colo. 

 Utah. Submont. -Subalp. Je-Au. 



