106 LILIACE^. 



11. LILIACE/E. Lily Family. 



Ours perennial herbs. Stems from bulbs, corms or rootstocks, either 

 scape-like and the leaves all radical, or more or less leafy and fre- 

 quently branching. Flowers regular and perfect; perianth with 6 

 segments or lobes, consisting of 3 sepals and 3 petals, usually colored 

 alike. Stames 6, sometimes 3 or 4. Ovary superior, 3-celled; style 

 or stigmas 3. Fruit a capsule or berry. Maianthelnum has a 

 2-merous flower and Scoliopus a 1-celled ovary. The flowers in 

 Veratrum are polygamous. Trillium has netted-veined leaves. 



A. Fruit a capsule. 

 Plants with bulbs or corms. 

 Stems leafy from a scaly bnlb, some of the leaves often whorled, or in 2 

 species mostly at base. 

 Flowers less than 1%, mostly less than 1 in. long; style often 3-cleft; 

 perianth-segments with a more or less circular nectar-bearing area 



towards the base 1. Fbitillaeia. 



Flowers much larger, always showy; style one; perianth-segments not 

 bearing nectaries, but with a nectar-bearing groove towards the base. 



2. LiLIUM. 



Stems from corms; leaves all at base and the stems either scapes or scape-like, 



but with few or reduced cauline leaves in no. 5 and in some species of 



no. 4. 



Flowers solitary or racemose, bractless, borne on a scape-like stem; 



perianth segments equal or nearly so; leaves 2, at the base of the stem, 



broad 3. Erythkonium. 



Flowers solitary on a simple stem, terminal on the branches or umbellately 

 fascicled but without involucre or circle of bracts; outer perianth seg- 

 ments commonly greenish and much smaller than the inner showy 

 ones which usually bear a conspicuous gl'andular pit near the base; 

 leaves few, narrow and elongated, all radical or 1 or 2 cauline. 



4. Calochortus. 

 Flowers in racemes terminating the branches; bracts subulnte; perianth 



with a narrow tube and refiexed segments; stamens 6; staminodia 6. 



5. Odontostomck. 

 Flowers in umbels, always with 2 or more bracts; leaves all radical. 



Perianth-segments united.below into a tube. 

 Perianth-tube scarlet, the short segments chrome-green. 



6. Bkevooetia. 

 Perianth of one color, blue, purple, white, or yellow; stamens 6, often 



with appendaged or winged filaments or 3 of the stamens replaced 

 by dilated sterile filaments or staminodia . ... 7. Hookbea. 

 Perianth-segments distinct or nearly so. 

 Filaments arising from a cup-like appendage .... 8. Bloomeeia. 

 Filaments not appendaged, sometimes dilated at base. 



Leaves semi-terete; bracts 4 to 6 9. Mcilla. 



Leaves plane or convolute-filiform; bracts 2 or 3. . 10. Allium. 

 Stems from tunicated bulbs; perianth segments' distinct; leaves all or 

 mainly radical. 

 Style 3-olefl, at least slightly; capsule looulicidal, as in all the preceding. 



Flowers in a simple raceme borne on a scape 11. Camassia. 



Flowers racemose in a widely branching very ample panicle. 

 „^ , „ J. ^. ^ , 12. Chloeogalum. 



Styles 3, distmct; capsule deeply 3-lobed, septicidal; flowers in a raceme or 

 panicle, the perianth segments with green glands at base. 



r,!.. 1 .It 1= , i i , 13. Zygadenus. 



Plants with vertical rootstocks. 



Stem simple, tall, and leafy; panicle pubescent; styles 3, distinct; capsule 

 3-lobed, septicidal 14. Vebatkum: 



Stem simple; leaves numerous, sedge like, mostly radical, those of the stem 

 reduced; stamens 6. 



