LILlACEJfi. 179 



Flowers rose-purple to white: bracts broad: odor of onions ...* 1 



Flowers greenish white: bracts narrow: slender leaves several 8 



Flowers yellow: pedicels jointed at top: leaves one or several 8 



6. Perianth not parted to the base: stamens on the throat. 



Perianth-tube thin, somewhat inflated and angular or saccate: stamens on the throat in 



one row; anthers basi fixed, 3 alternating with petaloid staminodia or smaller anthers : 



ovary nearly or quite sessile 4 



Perianth-tube thicker, opaque, not inflated or saccate: anthers basifixed, 3 alternating 



with petaloid staminodia: filaments deourrent to base: ovary sessile 5 



Perianth-tube not inflated or saccate: filaments in two rows (except sp. 11); anthers 



versatile 6 



Perianth-tube snbcylindrical, 6-saccate at base, scarlet or crimson, the short segments 



yellowish: stamens 3 alternating with broad staminodia 7 



* Flowers on short scape-like pedicels, umbellate on an underground peduncle. 



Perianth salver-form; tube slender, 1-2 in. long; lobes half as long 8 



* * * Flowers in racemes or panicles', perianth segments distinct and anthers versatile 



(except No. 12.) 

 a. Stems scape-like or sparingly leafy, arising with many leaves from a bulb. 



Flowers blue or white, &-! in. long, slightly one-sided, in a simple raceme 9 



Flowers white or whitish, 2-5 lines long in a dense nearly simple raceme 10 



Flowers white or pinkish, scattered on branches: withering perianth twisted 11 



Flowers white or yellowish, paniculate: perianth-tube equaling reflexed lobes. ...... 12 



6. Stems not scape-like, simple: rootstock slender: white flowers small. 



Leaves 2-ranked, sessile, often clasping, lanceolate to ovate 13 



Leaves 2, rarely 3, petioled, cordate: perianth-segments 4: stamens 4 14 



c. Stems rigid: lower bracts and rigid leaves spine-tipped: flowers 1-3 in. long 15 



2. Floral bracts none or leaf -like: perianth segments distinct, deciduous: anthers 



extrorse or opening on the sides. In No. 24 the perianth is persistent: anthers 



introrse. 



a. Stem simple, from a scaly bulb: leaves often whorled: perianth segments similar: 

 anthers versatile: style long: fruit a capsule: seeds flat, horizontal. 



Segments oblanceolate, with a groove: style entire: stigma large, 3-lobed 16 



Segments broader, not groved: style entire or 3-cleft; stigmas small .. 17 



b. Stem from a coated corm: anthers basifixed. 



Leaves a pair at the base, broad: perianth-segments similar, lanceolate, recurved.... 18 

 Leaves few, linear-lanceolate: perianth -segments unlike, the inner (peials) broad.... 19 



c. Stem branching, leafy above: rootstock slender: flowers nodding or hanging. 



Flowers apparently axillary : anthers 1-2-awned or pointed above, sagittate 2O 



Flowers white or greenish, terminal, in clusters or solitary, beneath the leaves 21 



d. Stem a scape or scape-like from a rootstock: large leaves basal: flowers umbellate or 

 solitary, red or white: filaments hairy: ovary 2-celled: fruit a many-seeded berry. 22 



