32 CHORIPETALAE 



347. Leaves opposite or whorled, undivided, stipulate. Petals valvate in bud. 



Stamens perigynous. Shrubs or trees. . 177. Rhizophoraceae. 

 Leaves alternate 348 



348. Leaves simple, stipulate. Stamens hypogynous. 141. Tiliaceae. 

 Leaves compound, more rarely simple, but then, as usual, exstipulate. 



Shrubs or trees 117. Burseraceae. 



349. Stipules present, but sometimes very small and caducous. . . . 350 

 Stipules wanting, but axillary spines sometimes present. . . . 352 



350. Sepals 3, surrounded by a 6-toothed involucre. Petals 5. Disc cup- 



shaped. Trees or shrubs. Leaves alternate, undivided. 



Leptochlaena , 140. Chlaenaceae. 



Sepals 4 — 6. Disc ring- or cushion-shaped or reduced to separate scale? 



or wanting 351 



351. Stigma I, entire or lobed. Filaments usually provided with an appendage. 



Leaves usually compound 113. Zygophyllaceae. 



Stigmas 5. Filaments without an appendage. Leaves simple, but some- 

 times dissected. Fruit beaked, splitting into 5 nutlets. 



107. Geraniaceae. 



352. Flowers irregular, 4-merous. Disc outside the stamens, one-sided, 



sometimes indistinct. Ovary 2 — 3-celled. Leaves pinnate. 



134. Sapindaceae. 

 Flowers regular 353 



353. Bark resinous. Leaves rarely dotted. Ovniles pendulous or laterally 



attached. Fruit drupe-like, but sometimes dehiscing. Seeds exal- 



buminous 117. Burseraceae. 



Bark not resinous. Leaves gland-dotted. Ovules usually ascending. 



115. Rutaceae. 



354- (344-) Sepals valvate in bud, united below. Leaves stipulate. . . 355 



Sepals imbricate in bud 356 



355. Leaves opposite or whorled. Petals toothed or slit, valvate in bud. 



177. Rhizophoraceae. 

 Leaves alternate. Petals nearly always imbricate in bud. 



144. Sterculiaceae. 



356. Stigmas 5. Ovary lobed. Sepals and petals imbricate in bud. Herbs 



or undershrubs. Leaves simple, stipulate. . . 107. Geraniaceae. 

 Stigmas i — 3. Shrubs or trees 357 



357. Leaves stipulate, undivided. Petals with contorted aestivation. Disc 



wanting 110. Linaceae. 



Leaves exstipulate. Stigma i, entire or lobed 358 



358. Leaves simple, undivided. Ovary 3-celled. Disc wanting. 



Asteropeia, 148. Theaceae. 



Leaves compound, more rarely simple, but then ovary 4 — 20-celled. 



Disc usually present 118. Meliaceae. 



