280 LILIACEAE (LILY FAMILY) 



Corthotropous in Smilax). Flowers not from a spathe, except in Allium; the 

 outer and inner ranks of the perianth colored alike (or nearly so) and generally 

 similar, except in Trillium. 



Tribe I. NARTHECiEAE. Flowers perfect, small, spicate-racemose. Perianth of 6 distinct seg- 

 ments. 8tyle none ; stigma small, slightly lobed or undivided. Fniit a loculicidal capsule. 



1. Narthecium. Filaments woolly. Perianth-segments linear-lanceolate, yellowish. Capsule 



short-cylindric, attenuate, many-seeded. 



Tribe II. HELONIeAE. Flowers (small) jierfect or dioecious, racemo-spicate. Perianth of 6 



distinct segments. Styles 3, distinct. Fruit a loculicidal capsule. 



2. Xerophyllum. Flowers perfect. Seeds 2 in each cell. 



3. Helonias. Flowers perfect. Seeds many in each cell, linear and with a tapering appendage 



at each end. 



4. Chamaelirium. Flowers dioecious. Seeds numerous, somewhat wing-appendaged at the 



ends. 



Tribe III. VERATREAE. Flowers perfect or polygamously monoecious. Perianth of 6 nearly 

 or quite distinct segments. Styles 3, distinct. Fruit a septicidal capsule. 



5. Tofieldia. Flowers perfect. Anthers 2-celled. Leaves 2-ranked, equitant. 



6. Amianthium. Flowers perfect. Anthers confluently 1-celled. Leaves several-ranked. 



Perianth-segments glandless. 



7. Stenanthium. Flowers polygamous. Perianth-segments lanceolate, acuminate, glandless. 



Stem from a bulbous base. 



8. Zygadenus. Flowers perfect or monoecious. Leaves several -ranked, linear. Perianth- 



segments glandular at the base, ovate or oblong. Stem glabrous. 



9. Melanthium. Flowers polygamo-monoecious. Stem pubescent above, from a running root- 



stock. Perianth-segments free from the ovary, their long claws adnate to the filaments. 



10. Veratrum. Flowers polygamo-monoecious. Stem pubescent above, from a running root- 



stock. Perianth- segments without claws, slightly adnate to the ovary. 



Tribe. IV. UVULARIeAE. Flowers perfect. Perianth-segments distinct. Style 3-cleft to below 

 the middle. Fruit a loculicidal capsule. Flowers terminal or axillary. Stem leafy. 



11. Uvularia. Stem terete. Leaves perfoliate. Flowers terminal. Capsule truncate, 3-lobed. 



12. Oakesia. Stem angled. Leaves sessile but not perfoliate. Flowers appearing opposite the 



leaves. Capsule rounded or more or less pointed at the summit, acutely 3-winged. 



Tribe V. ALLIeAE. Flowers perfect, umbellate. Perianth-segments 6, nearly or quite distinct, 

 l-nerved. Style single, long ; stigma uncleft, or only slightly 3-lobed. Fruit a locuUcidal 

 capsule. Seeds few (1-T) in each cell, 



13. Allium. Seeds 1-2 in each cell. Plants with a strong odor. 



14. Nothoscordum. Seeds several in each cell. Plants without strong odor. 



Tribe VI. HEMEROCALLfDEAE. Flowers perfect. Perianth-segments united below the middle 

 into a funnel-shaped tube, not conspicuously roughened. Style single, long, declined, not 

 cleft. Fruit a loculicidal capsule. 



15. Hemerocallis. Flowers large. Perianth yellow or brownish-red. 



Tribe VII. LILIeAE. Flowers perfect. Perianth-segments distinct, petaloid. Style single, 

 elongated, uncleft. Fruit a locnlicidal capsule. Seeds numerous in each cell. Stem from a 

 scaly bulb or from a corm. 



16. Lilium. Stem leafy, from a scaly bulb. Seeds flattened. 



17. Erythronium. Stem a scape from a sohd bulb. Leaves 2, basal. Seeds obovoid. 



Tribe VIII. SCfLLEAE. Flowers perfect. ' Perianth-segments distinct and 3-several-nerved, or 

 united into an urceolate short-toothed tube, not roughened external!}'. Style single, slender, 

 uncleft. Fruit a loculicidal capsule. Stem scapose from a tunicate bulb. 



18. Camassia. Flowers light blue, long-racemose. Filaments filiform. Perianth-segments 



distinct. 



19. Ornithogalum. Flowers greenish-white, subcorymbose. Filaments dilated. Perianth-seg- 



ments distinct. 



20. Muscari. Flowers blue. Perianth gamophyllous, globose-urceolate ; limb short-toothed. 



