LILY FAMILY 305 



bulbs or corms, or sometimes from root-stocks, often with long, grass-like 

 leaves. 



1. Styles distinct 



a. Leaves broad, ovate to oblanceolate ; stems 



leafy; flowers greenish \ kratrum 



b. Leaves linear or grass-like; flowers yellow or 

 . white 



(1) Flowers yellow; stems sticky-hairy Tofieldia 



(2) Flowers white; stems not sticky-hairy 



(a) Leaves needle-shaped, 2 mm. wide or 



less ; rare Xerophyllum 



(b) Leaves linear, 4-15 mm. wide; common Zygadenus 



2. Styles united 



a. Flowers axillary, solitary or 1-few in a cluster 

 (^ 1 ) Parts of the perianth separate ; leaves 



heart-shaped and clasping at base Streptopus 



(2) Parts of the perianth united into a cylind- 

 ric tube ; leaves not heart-shaped and 

 clasping Polygonatum 



b. Flowers terminal 



(1) Flowers on a leafy stem 



(a) Flowers white or whitish to lilac 



x. Flowers in a raceme or panicle Wagnera 



y. Flowers solitary or 2-3 in an umbel 



(x) Flowers nodding; leaves ovate to Disporum 



lance-oblong 

 (y) Flowers erect; leaves linear, grass- 

 like 

 m. Flowers 1-3 in. wide ; petals 



fringed at base Calochortus 



n. Flowers 1-2 cm. wide; petals not 



fringed Lloydia 



(b) Flowers yellow to orange or purple 



x. Flowers erect, orange, 2-3 in. wide Lilium 



y. Flowers nodding, purple or yellow and 



purple-dotted, 1 in. wide or less Fritillaria 



(2) Plants stemless 



(a) Leaves stiff, spiny-pointed, 1-3 ft. long; 



flowers white in a long raceme Yucca 



(b) Leaves not stiff and spiny-pointed 



x. Flowers yellow, nodding Erythronium 



