114 LILIACEAE (LILY FAMILY) 



terete (sometimes hollow) . Flowers in a simple terminal umbel, deep rose 

 color to white. Perianth segments 1-nerved, usually spreading. Base of the 

 style inclosed between the lobes of the capsule and jointed upon the short 

 axis. Filaments usually dilated at the base. Capsule 3-celled, loculidical, 

 several-seeded. 



Leaves hollow, terete 1. A. sibiricum. 



Leaves not hollow, flat or terete. 

 Bulb-coats fibrous reticulated. 

 Valves of capsule crested. 



Perianth-segments acute 2. A. reticulatum. 



Perianth-segments acuminate 3. A. Geyeri. 



Valves of capsule not crested. 



Bulblets freely produced in the umbel . ... 4. A. rubrum. 



Bulblets rarely produced in the umbel 5. A. Nuttallii. 



Bulb-coats thin-membranous, sometimes reticulate-veined but not 

 fibrous. 



Umbel nodding 6. A. cernuum. 



Umbel erect. 



Bulb oblong, and rhizomatous below 7. A. brevistylum. 



Bulb small, subglobose. 



Leaves longer than the short scape 8. A. Brandegei. 



Leaves shorter than the scape . . . . . . 9. A. acuminatum. 



1. Allium sibiricum L. Mant. 562. 1767. Bulbs more or less caespitose: 

 leaves terete, hollow,, shorter than the stout 3-6 dm. high scape: umbel 

 crowded, subcapitate: flowers rose-color; the segments 8-10 mm. long, acumi- 

 nate: stamens included: capsule not crested. A. SchoenoprasumWet 

 meadow-lands; northern Wyoming to Canada, and east to the Great Lakes. 



2. Allium reticulatum Fraser, Hook. Fl. Bor. Am. 2: 184. 1839. Bulbs 

 rather large, usually single, the coats strikingly fibrous-reticulate: leaves nar- 

 row, channeled: scapes 1-2 dm. high: flowers white or pinkish; the pedicels 

 slender, 4-12 mm. long: bracts (spathe) 2: perianth-segments thin, acute: 

 capsule shorter than the perianth, each valve with two short crests at sum- 

 mit. Throughout our range, and north into Assiniboia. 



3. Allium Geyeri Wats. Proc. Am. Acad. 14: 227. 1879. Resembling the 

 preceding but taller and stouter, 2-4 dm. high: flowers rose-colored, 6-8 mm. 

 long; the segments broad, acute or acuminate, strongly nerved and rigid in 

 fruit; pedicels rather stout, 10-20 mm. long: stamens and style usually but 

 little shorter than the perianth: capsule crested. (A. dictyotum Greene, PI. 

 Baker. 1: 52. 1901.) From Colorado to Montana and west to Washington. 



4. Allium rubrum Osterh. Bull. Torr. Bot. Club 27: 506. 1900. Bulbs 

 usually single, fibrous-reticulate coated: scape 2-3 dm. high: leaves rather 

 narrow, flat or channeled: spathe 2 or 3-bracted: most of the flowers of the 

 umbel replaced by small red spherical bulblets: perianth-segments ovate to 

 lanceolate, usually obtusish, the outer often with a dark green midnerve, 

 narrowly ovate, 6-7 mm. long: pedicels about 1 cm. long: stamens and style 

 equaling the perianth. A. canadensis. (A. fibrosum Rydb. Bull. Torr. Bot. 

 Club 24: 188. 1897.) Throughout our range. 



5. Allium Nuttallii Wats. Proc. Am. Acad. 14: 227. 1879. Bulb usually 

 smaller, very fibrous: scape low, 1-2 dm. high: pedicels 8-12 mm. long, rather 

 stout: perianth-segments acute or acuminate, rose-colored or white, rather 

 rigid in fruit, 6 mm. long: capsule not crested: bulblets occasionally replacing 

 the flowers in the umbel. (A, arenicola Osterh. 1. c.) From Texas and New 

 Mexico to Wyoming. 



6. Allium cernuum Roth. Roem Arch. I 3 : 40. 1798. Bulbs mostly single: 

 leaves flat, 2-8 mm. wide: scape 1-5 dm. high: umbel open, nodding: flowers 

 numerous, on very slender pedicels, rose-colored or white; segments 4-6 mm. 

 long, broad, acutish: stamens and style exserted: capsule crested. (A. recur- 

 vatum Rydb. Mem. N. Y. Bot. Gard. 1: 94. 1900.) Frequent; throughout 

 our range and across the continent northward. 



7. Allium brevistylum Wats. King's Rep. 350. 1871. Scape 3-5 dm. high, 

 from a stout elongated bulb with rhizomatous base: leaves flat, 4-10 mm. 

 broad: spathe 1-valved: umbel erect, few-flowered; pedicels 10-25 mm. long: 

 flowers deep rose-color; segments 8-12 mm. long, narrow, long-acuminate, 



