LILIACEAE (^LILY FAMILY) 



281 



fribe IX. Y&CCEAE. Flowers perfect, racemo-paniculate. Perianth campanulate ; its segmenu 

 (large) distinct or somewhat connate near the base. Fleshy 3-lobed 8tigtnatoi)hora nearly or 

 quite sessile. Fruit a luculicldal capsule. Cells many-seeded. 



21. Yucca. Leaves sword-shaped, rigid. 



Tribe X. POLYGONATEAE. Flowers perfect. Style single, entire or shortly 3-cleft at the 

 summit. Fruit a berry. 



* Proper leaves reduced to scarious scales, the apparent (phyllodiai) leaves filiform. 



22. Asparagus. Stem excessively branched. Flowers small, axillary. 



* * Leaves neither scale-like nor filiform. 

 -«- Perianth-segments distinct. 



23. Clintonia. Scapose. Flowers umbellate or subumbellate. 



24. Smilacina. Leafy-stemmed. Flowers C-j)artcd, racemose or paniculate. 



25. Maianthemum. Low ; stem 1-3-leaved. Flowers 4-parted. 



26. Disporum. Leafy-stemmed. Flowers few in terminal umbels. 



27. Streptopus. Leafy-stemmed. Flowers axillary on bent pedicels. 



-i- +- Perianth-segments connate. 



28. Polygonatum. Stem leafy. Peduncles axillary, 1-8-flowered. Perianth cylindrical. 



29. Convallaria. Leaves sheathing the scape. Flowers racemose. Perianth bell-shaped. 



Tribe XI. PARIDEAE. Flowers perfect. Perianth- segments distinct. Style-branches distinct. 

 Fruit a berry. Cauline leaves whorled. 

 80. Medeola. CauUne leaves in 2 whorls. Flowers umbellate. Styles filiform. 



31. Trillium. Cauline leaves 3 in a single whorl. Styles short, thick, the stiginatic surface 



irregular. 



Tribe XII. AL^TREAE. Flowers perfect. Perianth (small, white or yellow) gamophyllous, 

 conspicuously roughened. Style single, slightly cleft at the summit. Ovary partly inferior. 

 Fru.'t a loculicidal many-seeded capsule. 



32. Aletris. Scapose. Flowers in a spicate raceme. 



Tribe XIII. SMILAcEAE. Flowers dioecious, umbellate. Fruit baccate. Leaves net-veinea. 



Tendrils usually present. 



33. Smilax. Periant -segments distinct, deciduous, small, greenish or yellowish. 



Artificial Key to Genera 



a. Flowers dioecious. 



Inflorescence umbellate ; fruit a berry 



Inflorescence a spicate raceme ; fruit a pod ..... 

 a. Flowers perfect or monoecious b. 



b. Perianth gamophyllous, urceolate or campanulate, with a 

 toothed Umb. 

 Stem leafy ; leaves ovate, oblong, or lanceolate . 

 Stem scapoid, leafy only at the base. 

 Leaves oblong ; perianth white. .... 



Leaves very narrow, lanceolate to linear or terete. 



Perianth smooth, blue 



Perianth roughened, white or vellow 

 6. Perianth cleft at least to the middle or divided to the base c 

 C. Fruit a berry d. 

 d. Cauline leaves whorled. 



Cauline leaves 3, in a single involucre-like whorl 



Cauline leaves in 2 whorls 



d. Cauline leaves alternate or none. 



Leaves all basal 



- Leafy-stemmed. 



Eeal leaves scale-like ; apparent leaves filiform . 

 Leaves foliaceons. never filiform. 



Flowers 4-parted 



•-Flowers 6-parted. 



Flowers racemose or paniculate . 



Flowers umbellate 



Flowers axillary, solitary or in pairs . 

 C. Fruit a capsule e. , ^ , ■ 



e. Style none or very short and fleshy. (See also Tulipa, 

 Flowers small ; leaves distichous .... 

 Flowevs large ; leaves several-many-ranked . 



shortly 



2S0) 



33. Smilax. 



4. CltAMAELIRIUM. 



28. PoLYCJONATt'M. 



29. Co.VVALLARIA. 



20. MlSCARI. 



32. Aletris. 



31. Trillutv. 



80. .Medeola. 



23. Cl.INTONlA. 



22. Asi\\RA(;rP. 



25. MAIANTIlEMrM. 



24. Smilacina. 



26. Disi'oiMM. 



27. Stp.eptoims. 



L NARTIIKniM. 



51. YuocA. 



