28 CHORIPETALAE 



297. Filaments free. Anthers opening by two longitudinal slits. Petals 5, 



perigynous. Style i ; stigmas 3. Climbing herbs. 



Tropaeolum, 109. Tropaeolaceae. 



Filaments united. Anthers opening by an apical pore. Petals hypogy- 



nous 120. Polygalaceae. 



298. (294.) Stamens as many as the petals or fewer or more numerous, but less 



than twice as many, 2 — 6 299 



Stamens twice as many as the petals or in greater number, rarely {Thy- 

 melaeaceae) as many as the petals, but then 8 — 10 305 



299. Filaments all united below. Fertile and sterile stamens together as many 



as the petals, 4 — 6. Disc not distinctly developed. Leaves un- 

 divided 300 



Filaments free or united in pairs 301 



300. Stamens all fertile. Seeds albuminous 110. Linaceae. 



Stamens partly sterile (2 fertile, 3 sterile). Seeds exalbuminous. 



Cottsia, 119. Malpighiaceae. 



301. Anthers opening by apical" pores. Petals and stamens 5, slightly perigy- 



nous. Ovary 3-celled. Style simple ; stigma 3-lobed. Seeds with 

 abundant albumen. Undershrubs. Leaves rolled inwards when young, 

 undivided, bearing glandular hairs. . . Roridula, 147. Ochnaceae. 

 Anthers opening by longitudinal slits. Seeds with scanty albumen or 

 without any 302 



302. Stamens 6, rarely 2 or 4. Style i. Sepals 4. Petals 4. Embryo curved. 



Herbs or undershrubs, rarely shrubs. Leaves simple. 88. Cruciferae. 



Stamens 5, rarely 4, but then styles 4 and leaves pinnate. Shrubs or 



trees 303 



303. Flowers 4-merous. Disc within the stamens. Leaves pinnate. 



116. Simarubaceae. 

 Flowers 5-merous 304 



304. Disc within the stamens. Ovary 3- or 5-celled. Styles or sessile stigmas 



3 or 5. Leaves simple 127. Anacardiaceae. 



Disc outside the stamens. Ovary 2-celled. Style simple. Leaves pinnate. 



Filicium, 134. Sapindaceae. 



305. (298.) Filaments free. Shrubs or trees, rarely underslu-ubs. . . 306 

 Filaments united into a tube, at least at the base 312 



306. Disc present, more or less ring-, cushion-, or cup-shaped. . . . 307 

 Disc wanting. Leaves undivided 310 



307. Flowers polygamous, 4 — 5-nierous. Leaves compound, exstipulate. 



127. Anacardiaceae. 

 Flowers hermaphrodite, rarely polygamous, but then 3-merous. . . 308 



308. Leaves with glandular dots, compound, exstipulate. Ovary 3 — 5-celled. 



Style simple 115. Rutaceae. 



leaves without dots 309 



