LILIACEA (LILY FAMILY.) 347 



** Stems from* short or creeping rootstock: fruit a reddish lobed berry: seeds 



pendulous. 



15. Streptopus. Flowers apparently axillary, greenish-white or purplish. Anthers 



sagittate, cuspidate, on short deltoid on subulate filaments. Leaves clasping. 



16. Prosartes. Flowers in fascicles (1 to 6-flowered) terminating the branches, white or 



greenish. Anthers oblong, obtuse, on slender filaments. Leaves with reticulated 

 veinlets. 



in. Like the last, but perianth persistent with nerved segments, styles distinct, and cap- 



sule septieidal (loculicidal in XerophyUum). 



♦Flowers usually polygamous : anthers 1-celled, peltate on opening: stems leafy: leaves 



not rigid nor equitant 



17. Veratrum. Stem tall and stout, from a thick rootstock. Inflorescence paniculate, 



pubescent. Leaves broad, strongly nerved and plicate. 

 IS. Zyg-adenus. Stem from a coated bulb. Inflorescence a raceme or subpaniculate, 

 glabrous : perianth-segments glandular at base. Leaves linear. 



* * Flowers dioecious, on naked pedicels, in a simple elongated raceme : stem very leafy : 



leaves thin, oblanceolate. 



19. Cliamselirium. Flowers white : segments narrowly linear-spatulate, equalling the 



stamens, which are shorter and abortive in the pistillate flowers. Seeds margined, 

 and winged at each end. 



* * * Flowers perfect, on bracteolate pedicels, in a simple raceme : anthers 2-celled, in- 



trorse : seeds numerous : stem leafy : leaves equitant. 



20. Tofieldia. Flowers involucrate with 3 scarious united bractlets. Styles short. 



Seeds appendaged. 



* * * * Flowers perfect, on naked pedicels, in a simple dense raceme : styles reflexed : 



seeds few : stem very leafy : leaves very narrow.-rigid and rough-edged. 



21. Xerophyllum. Flowers white, on long pedicels ; segments 5 to r-nerved. Seeds 



not appendaged. 



L ALLIUM, L. Onion. ' 



Perianth-segments 1-nerved, usually somewhat spreading. Ovules 2 at the 

 base of each celL Capsule often crested. Seeds obovoid and wrinkled. 

 § 1. Bulbs eespitose, narrowly oblong and drowning a more or less persistent rhi- 

 zome : spathe mostly 2-valved : leaves several, linear : scape terete. 

 * Leaves terete, hollow. 



1. A. Schoenoprasum, L. Scape stout : umbel subcapitate : flowers 

 rose-color ; segments 4 or 5 lines long, acuminate : stamens included : capsule 

 not crested. —From Canada and the Great Lakes to the Wind River Moun- 

 tains of Wyoming, Oregon, and Alaska. 



* * Leaves flat or channelled. 



2. A. cernuum, Roth. Scape slender, \ to 2 feet high, from a bulb: 

 leaves 1 to 4 lines wide : 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 New Mexico to Oregon, 

 British Columbia, and the Alleghany Mountains. 



3. A. brevistylum, Watson. Scape 1 to 1J feet high, from a stout rhi- 

 zome: leaves 2 to 4 lines wide: spathe 1-valved : umbel erect, few-flowered ; 

 pedicels 6 to 12 lines long : flowers deep rose-color ; segments i to 5 lines long, 

 narrow, long-acuminate, nearly twice longer than the stamens and style : capsule 

 not crested. — Bot. King Bxped. v. 350. N. W. Wyoming to S. Utah. 



