226 PROCEEDINGS OF THE AMERICAN ACADEMY 
1. ALLIUM, Linn. 
§ 1. Bulbs cespitose, narrowly oblong and crowning a more or less persistent 
rhizome; coats membranous, without peculiar reticulation: spathe mostly 
2-valved : scape terete. 
* Leaves (2 or 3) elliptic-lanceolate: ovules solitary. 
1. A. rricoccum, Ait. Bulb-coats fleshy-membranous, the outer 
becoming fibrous: scape 4 to 12 inches high: flowers greenish white, 
on short suberect pedicels ; segments two or three lines long, the outer 
channelled, the inner flat: stamens short, hypogynous, with nearly 
distinct subulate filaments: capsule deeply lobed, not crested. — A. 
triflorum, Raf. New England to Wisconsin, and south to North 
Carolina and Kentucky. 
* * Leaves (several) linear: ovules a single pair. 
+ Leaves terete, hollow. 
2. A. Scua@noprasum, Linn. Scape stout: umbel subcapitate : 
flowers rose-color ; segments 4 or 5 lines long, acuminate: stamens in- 
cluded: capsule not crested. — A. campanuleflorum, Geyer. From 
Canada (New Brunswick) and the Great Lakes to the Columbia and 
Peace Rivers and N. Alaska; Europe and N. Asia. 
+ + Leaves flat or channelled. 
3. A. cERNUUM, Roth. Outer bulb-coats sometimes finely fibrous : 
scapes slender, } to 2 feet high: leaves 1 to 4 lines broad: umbel 
open, nodding: flowers numerous, on very slender pedicels, rose- 
colored or white; segments 2 or 3 lines long, broad and acutish: 
stamens and style exserted: capsule crested. — From the Alleghany 
Mountains to British Columbia, Oregon, Utah, New Mexico and 
Texas. 
4, A. VALIDUM, Watson. Scape very stout, 1 to 2} feet high, 
from a stout rhizome: leaves 2 to 8 lines broad: umbel often slightly 
nodding, with 2 to 4 bracts, densely many-flowered ; pedicels short : 
flowers rose-colored or nearly white; segments 3 or 4 lines long, 
narrowly acuminate: stamens and style usually slightly exserted : 
capsule not crested, subglobose. — King’s Rep. 5. 850. Oregon to N. 
California and N. Nevada. 
5. A. BREVISTYLUM, Watson, 1. c. Scape 1 to 14 feet high, from 
a stout rhizome: leaves 2 to 4 lines wide: spathe 1-valved: umbel 
erect, few-flowered ; pedicels 6 to 12 lines long: flowers deep rese- 
color; segments 4 or 5 lines long, narrow, long-acuminate, nearly 
twice longer than the stamens and style: capsule not crested. — 
Northwestern Wyoming to S. Utah. 
