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 S-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 Ireely 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 created. A. Schoenoprasum. — Wet 

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



2. Allium reticulatum Fraser, Hook. PI. 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 : flowerdJfOse-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. AlUum 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 inidnerve, 

 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 NuttaUii Wats. Proc. Am. Acad. 14: 227. 1879. Bulb usually 

 smallor, 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. 13; 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^ 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. Alliixm brevistylimi 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, 



