purple or purplish-green flowers with separate segments. 

 It blooms in early summer, from North Dakota and 

 Wyoming westward. 



PLATE VII, A 



NUTTALL'S MARIPOSA LILY, Calochortus Nuttallii. 

 Root. A corm. Stem. Branched, slender, 3'-! 5' high. 

 Leaves. Grass-like, alternate. Flowers. Large, 

 showy, white. Perianth. The three outer segments (or 

 sepals) are lanceolate, greenish- white; the three inner 

 (or petals) are rather wedge-shaped and recurved, white 

 or lavender, with a yellowish base, above which is a 

 purple spot. Stamens (c). Arrow-shaped. Pistil (d). 

 With a three-lobed stigma. 



So graceful and ethereal is this fair flower, swaying 

 on its slender stalk among the tall grasses, that it seems 

 almost unearthly. It blooms from South Dakota west 

 to California, from June to August. 



PLATE VII, B 



GUNNISON'S MARIPOSA LILY, C. Gunnisoni. Root. 

 A corm. Stem. Often simple, as above. Leaves. As 

 above, with incurved edges. Flowers. Large, showy, 

 white. Perianth. The sepals as above, the petals white 

 or lavender, with a purple band across the centre within, 

 yellowish and hairy below. Stamens (a). With oval 

 anthers. Pistil (b). With a three-lobed stigma. 



This plant is much like its Mariposa sister. It grows 

 as far south as New Mexico and blooms in midsummer, 

 as does the other. I found it in a meadow in the Canyon 

 of the Grand, near Glenwood Springs, Colorado. 



Another Western genus is the YUCCA, which has hollow, 

 spike-like leaves, with fibrous threads hanging from their 

 margins. The flowers are large, creamy-white, have 

 separate segments, and droop from a tall, dense, terminal 

 cluster. They bloom in spring and early summer. 



SPANISH BAYONET, Yucca baccata, is the largest. It 

 is sometimes 8 high. Its flowers are very large and its 

 fruit edible. 



