2S2 



LILIACEAE (LILY FAMILY) 



e. Style or styles flllforra /. 

 /. Style single, entire or more or less deeply parted g. 

 g. Style 3-parted to below the middle. 



Leaves perfoliate 



Leaves sessile, not perfoliate .... 

 g. Style entire or slightly 3-lobed at the summit h. 

 h. Stem rhizomatose at the base .... 

 h. Stem bulbous at the base i. 



i. Bulb solid (a corm) ; leaves 2, basal . 



*. Bulb scaly ; stem leafy .... 



i. Bulb tunicate. 



Perianth-segments 1-nerved. 

 Herbage with the odor of onion . 

 Herbage without strong odor 

 Perianth-segments 3-several-nerved. 

 Perianth blue ; filaments thread-like . 

 Perianth greenish-white ; filaments broad 

 /. Styles 3, distinct to the base j. 

 j. Stigmas hnear. 



Perianth-segments purplish ; seeds many in each cell 

 Perianth-segments white ; seeds 2 in each cell 

 j. Stigmas terminal. 



Anthers 2-celled 



Anthers confluently l-celled. 

 Stem pubescent. 

 Perianth-segments clawed .... 

 Perianth-segments essentially sessile 

 Stem glabrous. 

 Perianth-segments glandular near the base . 

 Perianth-segments not glandular. 



Flowers polygamous 



Flowers perfect 



11. TT'^TTLARIA. 



12. Cakesia. 



15. flEMEK<>0ALLI8 



17. Erythronium. 



16. LiLIUM. 



18. Allium. 



14. notiioscordum 



18. Camassia. 



19. Ornituogalum. 



8. Helonias, 



2. Xerophyllum. 



5. Tofieldia. 



9. Melanthittm. 

 10. Veratkum. 



8. Zygadenus. 



7. Stenanthium. 

 6. Amianthium. 



1. NARTHECIUM [Mohring] Juss. Bog Asphodel 



Sepals 6, linear-lanceolate, yellowish, persistent. Anthers linear, introrse. 

 Seeds ascendins:, appendaged at each end with a long bristle-form tail. — Root- 

 stock creeping, bearing linear equitant leaves, and a simple stem or scape termi- 

 nated by a simple dense bracteate raceme ; pedicels bearing a linear bractlet. 

 (Name an anagram of Anthericum, from dvdipiKos, supposed to have been the 

 Asphodel.) 



1. N. americanum Ker. Stem 2.5-4 dm. high; leaves 0.7-1.5 mm. wide, 

 7-9-nerved ; raceme dense (2-5 cm. long) ; perianth-segments narrowly linear 

 (4-5 ram. long), scarcely exceeding the stamens. {Abama Morong.) — Sandy 

 bogs, pine-barrens of N. J. June, July. 



2. XEROPHYLLUM Michx. 



Perianth widely spreading; sepals petal-like (white), oval, distinct, without 

 glands or claws, 5-7-nerved, at length withering, about the length of the awl- 

 shaped filaments. Anthers 2-celled, short, extrorse. Styles thread-like, stig- 

 matic down the inner side, persistent. Capsule globular, 3-lobed, obtuse (small). 

 Seeds collateral, 8-angled, not margined. — Herb with the stem simple, from a 

 thick tuberous rootstock, bearing a simple dense bracteate raceme of showy 

 flowers, and thickly beset with needle-shaped leaves, the upper reduced to 

 bristle-like bracts ; those from the root in a dense tuft, reclined, rough on the 

 margin, dry and rigid. (Name from ^rjpos, arid, and cpvWov, leaf.) 



1. X. asphodeloides (L.) Nutt. Stem 3-12 dm. high. (X. setifolium Michx.) 

 — Pine-barrens, N. J. to e. Tenn., and Fla. June. 



3. hel6nias l. 



Perianth of 6 spatulate-oblong purple segments, persistent, several-nerved, 

 glandless, turning green, shorter than the thread-like filaments. Anthers 

 2-celled, roundish-oval, blue, extrorse. Styles revolute, stigmatic down the 

 inner side, deciduous. Capsule obcordately 3-lobed, loculicidally 3-valved ; the 

 valves divergently 2-lobed. — A smooth perennial, with many oblong- spatulate 



