LILIACEAE. 93 



mostly perfect, regular; perianth not glumaceous, of 6 separate 

 or united segments free from the ovary; stamens 6, opposite 

 the perianth-segments; ovary 3-celled; fruit a few to many- 

 seeded 3-celled capsule or berry. 



Plants with bulbs or corms. 

 Flowers in umbels. 



Perianth-lobes united, funnelform; stamens 



on the throat. 107. HOOKERA, 94. 



Perianth-lobes not at all or but slightly 



united ; stamens on the bases of the lobes. 108. ALLIUM, 95. 

 Flowers solitary, or in racemes, cymes, or pan- 

 icles. 



Perianth-segments unlike, the outer nar- 

 rower. 109. CALOCHORTUS, 96. 

 Perianth-segments all alike or nearly so. 

 Leaves or some of them on the stem. 

 Bulbs scaly; anthers versatile. 



Nectary a linear groove; perianth 



not campanulate. 110. LILIUM, 96. 



Nectary a shallow pit; perianth 



campanulate. 111. FRITILLARIA, 97. 



Bulbs corm-like; anthers not ver- 

 satile. 



Leaves only two, rather broad. 112. ERYTHRONIUM, 97. 

 Leaves several, narrow, grass- 

 like. 113. LLOYDIA, 98. 

 Leaves all linear, basal. 



Flowers large, blue or white. 114. QUAMASIA, 98. 



Flowers small, greenish- white or 



purplish. 

 Flowers erect; perianth-segments 



gland-bearing at base. 115. ZIGADENUS, 99. 



Flowers nodding; perianth- 

 segments glandless. 116. STENANTHIUM, 99. 

 Plants with rootstocks. 



Leaves reduced to scales; branches thread- 

 like, green. 117. ASPARAGUS, 99. 

 Leaves not reduced to scales; branches normal. 

 Leaves all basal. 



Leaves equitant. 118. TOFIELDIA, 100. 



Leaves not equitant. 119. CLINTONIA, 100. 



Leaves cauline, at least in part. 



Leaves in whorls of three below the 



flower. 120. TRILLIUM, 100. 



Leaves not in whorls. 



Leaves opposite. 121. SCOLIOPUS, 101. 



Leaves alternate. 

 Flowers axillary. 



Perianth rotate. 122. KRUHSEA, 101. 



Perianth narrowly campanu- 

 late. 123. STREPTOPUS, 101. 

 Flowers terminal. 



Leaves linear, rigid. 124. XEROPHYLLUM, 102. 



Leaves broader, not rigid. 

 Flowers umbelled or soli- 

 tary terminal. 125. DISPORUM, 102. 



