xxii INTRODUCTION 



m. Ovary superior 



(m) Stamens and pistils in different 



flowers; plants with tendrils SMILACACEAE 312 

 (n) Stamens and pistils usually in 



the same flower 



r. Sepals and petals greenish, tiny 

 (r) Ovaries 3-6, separating, at 



least when ripe JUNCAGINACEAE 303 



(s) Ovary 1, of 3 carpels JUNCACEAE 312 



s. Sepals and petals typically 



colored 

 (r) Stamens 3 PONTEDERIACEAE 



314 



(s) Stamens 6 LILIACEAE 304 



n. Ovary inferior 



(m) Flowers perfect ; stamens 3 ; 



plants terrestrial IRIDACEAE 316 



(n) Flowers imperfect; stamens 



3-9 ; plants aquatic HYDROCHARITACEAE 



315 



(y) Flowers irregular 



m. Stamens many RANUNCULACEAE 1 



n. Stamens 1-8 



(m) Sepals 3 ; petals 3, 1 large and 



lip-like ORCHIDACEAE 316 



(n) Sepals 5, 2 petal-like ; petals 3 POLYGALACEAE 30 

 (2) Petals 4 



(a) Flowers regular 

 x. Stamens 3-5 



(x) Leaves of 3 leaflets RUTACEAE 40 



(y) Leaves simple 

 m. Shrubs 



(m) Ovary superior 



r. Leaves opposite CELASTRACEAE 211 



s. Leaves alternate LEDUM IN ERICA- 



CEAE 86 



(n) -Ovary inferior CORNACEAE 222 



n. Herbs 



(m) Pistils separate CRASSULACEAE 188 



(n) Pistils united 



