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LILIACEiE. 



11. LILIACE>E. Lily Family. 



Ours perennial herbs. Stems from bulbs, corras or rootstoeks, 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. Maianthemum 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 bulb, some of the leaves often whorled, or in 2 

 species mostly at base. 

 Flowers less than iy 2 , 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. Fritillaria. 



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

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



2. Lii.ium. 



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. Erythronium. 



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 glandular 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 subulate; perianth 

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



5. Odontostomum. 

 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. Brevoortia. 



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. Hookera. 

 Perianth-segments distinct or nearly so. 

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

 Filaments not appendaged, sometimes dilated at base. 

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



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-cleft, at least slightly; capsule loculicidal, 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. 



12. Chlorogalum. 



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

 panicle, the perianth segments with green glands at base. 



13. Zygadenus. , 



Plants with vertical rootstoeks. 

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



3-lobed, septicidal 14. Veratrum. 



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

 reduced; stamens 6. 



