KEY TO THE FAMILIES. 25. 



271. Sepals valvate in bud. Stamens twice as many as petals, 



rarely as many, and then leaves with small stipules. 



Anthers opening by longitudinal slits. 



113 OENOTHERACEAE. 



Sepals imbricate or open, or if valvate then stamens as many 

 as petals or leaves without stipules, or anthers opening 

 by apical pores. 272. 



272. Leaves opposite or whorled. 112 MELASTOMACEAE. 

 Leaves alternate. 273. 



273. Stem herbaceous or woody at base. 



146 CAMPANULACEAE. 



Stem woody throughout. 85 CELASTRACEAE. 



27+ Leaves alternate. (Barringtonia) 108 LECYTHIDACEAE. 



Leaves opposite gland dotted. Ill MYRTACEAE. 



275. (30) Stamens numerous united in a tube. Anthers 1 celled. 



95 MALVACEAE. 

 Stamens free, or if united, then not numerous or 2-celled. 276. 



276. Shrubs with ericoid leaves. Flowers 4-merous. Stamens 



usually 8, ovary 4-celled, rarely 8 celled. 



118 ERICACEAE. 

 Not as for Ericaceae. 277. 



277. Anthers adhering to a central style. Pollen in pollen masses. 



Corona usually present. Juice milky. Carpels 2. 



128 ASCLEPIADACEAE. 

 Not as in Asclepiadaceae. 278. 



278. Style thickened at apex (sometimes 2 lobed), bearing the 



stigmas on the under surface of the thickened part. 

 Anthers sometimes adhering to style, but filaments free. 

 Juice milky, mostly trees and shrubs. 



127 APOCYNACEAE. 

 Not as in Apocynaceae. 279. 



279. Ovary superior or nearly so. 28O. 

 Ovary inferior to half inferior. 346. 



280. Herbs with 10 stamens united at base, the S alternate 



shorter. Ovary 5 lobed, 5 celled. Styles 5. (Oxalu). 



71 OXALIDACEAE. 

 Not as for Oxalis. 28I. 



281. Ovary 1. 282. 

 Ovaries 2 or more, more or less distinct. 342. 



282. Ovary 1 celled. 283. 

 Ovary 2 or more celled. 305. 



283. Ovule 1. 284. 

 Ovules 2 or more. 287. 



284. Styles or style branches 5. Stamens 5 opposite petals. 



121 PLUMBAGINACEAE. 

 Style 1. 285. 



