LILIACE.E. (LILY FAMILY.) 351 



folded: raceme about an inch long, From New Mexico to Oregon and 

 Labrador. 



3. S. sessilifolia, Nutt. Rootstock slender : stem a foot or two high : 

 leaves lanceolate, acuminate, sessile, usually flat and spreading, somewhat 

 puberulent : raceme larger and pedicels longer (2 to 7 lines). Watson in 

 Proc. Am. Acad. xiv. 245. From the Wahsatch to California and British 

 Columbia. Usually referred to S. stellata. 



9. YUCCA, L. SPANISH BAYONET. 



Segments of perianth ovate-lanceolate, many-nerved. Stigmas emarginate 

 and more or less connate into a stigmatic tube. Fruit incompletely 6-celled. 

 Flowers usually solitary and nodding. In ours the caudex is short or none. 



* Fruit baccate, pendulous : seeds thick, rugose, not margined, with lobed or 



ruminated albumen. 



1. Y. baccata, Torr. Leaves coarsely filamentose on the margin, very 

 thick and rigid, l to 3 feet long by an inch or two wide, channelled or con- 

 cave, rough especially on the back, tipped by a very stout brown spine: 

 panicle pedunculate : perianth-segments narrow, 2 to 3 inches long : fruit 

 oval or cylindric, dark purple, often long-beaked. S. Colorado and W. 

 Texas to S. California and Northern Mexico. 



* * Fruit capsular, erect: seeds thin, smooth, broadly margined, with entire 



albumen. 



2. Y. angUStifoliaj Pursh. Leaves filamentose on the margin, very 

 stiff and pointed, usually 1 to 3 feet long by 3 to 6 lines wide, smooth : ra- 

 ceme usually simple, nearly sessile, 1 to 4 feet long : flowers greenish- white 

 or tinged with brown ; segments broadly ovate, an inch or two long : fruit 

 6-sided. From New Mexico to Dakota. 



10. L ILIUM, L. LILY. 



Stems leafy, simple : leaves narrow, sessile, whorled or scattered, net- 

 veiued : flowers large and showy, in ours usually solitary and erect. 



1. L. Philadelphicum, L. Bulb small, of thick fleshy jointed scales: 

 leaves linear-lanceolate, whorled or scattered : perianth-segments reddish- 

 orange, coarsely spotted on the lower half, acute, spreading, abruptly nar- 

 rowed to the claw. From Colorado to the Saskatchewan and eastward to 

 N. Carolina and Canada. 



11. PRITILLARIA, L. 



Stems erect, simple, leafy : flowers often nodding and much smaller than 

 in Lilium. 



1 . P. atropurpurea, Nutt. Bulb of numerous thick scales : stem 8 to 

 15 inches high or more, I to 6-flowered : leaves 6 to 20, scattered or somewhat 

 verticillate : flowers dull purple with more or less of yellowish green : styles dis- 

 tinct above ; stigmas linear : capsule acutely angled, broadly obovate. From 

 Wyoming to the Sierra Nevada. 



