348 ULIACE.&. (LILY FAMILY.) 



§2. Bulbs mostly solitary, globose to ovate, not rhizomatous t leaves narrowly 



linear, flat or channelled: scape terete or nearly so. 



* BuUxoats more or less fibrous : leaves several. 



*- Capsule not crested! spathe usually 3-valved. 



4. A. Canadonse, Kalm. Bulb-coats somewhat fibrous : scape a foot or 

 more high : umbel mostly bulbiferous : flowers on slender pedicels (6 to 10 lines 

 long) ! white or pinkish; segments narrowly lanceolate, obtusish, equalling or some- 

 what exceeding the stamens. — Along our eastern border and eastward to the 

 Atlantic States. 



5. A. mutabile, Michx. Like the last: bulbs densely and coarsely fibrous- 

 coated : scape a foot or two high : umbel rarely or never bulbiferous : flowers 

 white to rose-color ; segments thin and lax in fruit, ovate to narrowly lanceolate, 

 obtusish or acute, a third longer than the stamens. — A. reticulatum, var. y, Watson, 

 Bot. King Exped. v. 486. From New Mexico and S. Colorado eastward to the 

 Atlantic States. 



6. A. Nuttallii, Watson. Bulb usually smaller, very fibrous: scape low 

 (4 to 6 inches high) : pedicels shorter (4 to 6 lines long) and usually stouter: 

 perianth-segments usually broader, acute or acuminate, rose-colored or white, 

 rather rigid in fruit. — Proc. Am. Acad. xiv. 227. A. mutabile, var. $, Watson. 

 From Kansas and Colorado southward. 



*- t- Capsule crested : spathe usually i-calved. 



7. A. reticulatum, Fraser. Scape 3 to 8 inches high : pedicels usually 

 short (2 to 6 lines long) ; otherwise closely resembling A. mutabile. — From 

 New Mexico and Colorado to the Saskatchewan. 



* » Bulb-coats not fibrous : some of the outer membranous coats in most species 

 marked by a peculiar reticulate venation : leaves several (2 to 4) : spathe 

 2-valved. 



*- Ovary not crested or obscurely so : scapes low. 



8. A. Brandegei, Watson. Bulbs small, the reticulation of the coats hori 

 zontally oblong : leaves 2, exceeding the angular scape : pedicels slender, equal. 

 about 4 lines long : flowers rose-colored ; the segments broadly lanceolate, acute. 

 nearly twice longer than the stamens, not serrulate. — Proc. Am. Acad, xvii 

 380. Elk Mountains, Colorado (Brandegee). 



9. A. acuminatum, Hook. Outer bulb-coats with a distinct coarse quad- 

 rate to hexagonal reticulation: pedicels 6 to 12 lines long: flowers deep rose- 

 color; segments lanceolate, with acuminate recurved tips, rigid in fruit, a 

 third longer than the stamens, the inner ones undulate-sermlate. — From 

 S. W. Colorado to the Wasatch and Uinta Mountains, N. California and 

 Washington. 



+- 4- Ovary conspicuously 6-crested: perianth-segments not serrulate, mostly rose- 

 colored. 



10. A. stellatum, Fraser. Outer bulb-coats reddish, with a very close 

 linear longitudinal reticulation: scape 6 to 18 inches high: pedicel 4 to 9 lines 

 long : perianth-segments broad, acute : stamens and style exserted. — From Wyo- 

 ming to the Saskatchewan. 



11. A. bisceptrum, Watson. Bulbs light-colored ; reticulation indistinct : 

 scapes lower, frequently in pairs : perianth-segments oblong-lanceolate, acuminate, 



