SYMPETALAE 



53 



588. Style simple or 2-cleft , 589 



Style 3 — lo-cleft. Flowers unisexual or polygamous 603 



589. Fertile stamens fewer than the divisions of the corolla, I — 4. . . . 590 

 Fertile stamens as many as or more than the divisions of the corolla. 595 



590. Fertile stamen I, staminodes 3. Corolla-lobes 4. Stigma 2-cleft. Herbs. 



Leaves opposite, undivided 199. Gentianaceae. 



Fertile stamens 2 or 4 591 



591. Fertile stamens 2. Herbs or undershrubs. Leaves undivided. Flowers 



irregular 592 



Fertile stamens 4 594 



592. Seeds 4, with thin albumen. Fruit a capsule with a drupaceous rind 



Ovules 4 — t6. Stigma 2-parted. Staminodes 3. 



Martynia, 211. Martyniaceae. 

 Seeds numerous, without albumen. Ovules numerous 593 



593. Disc wanting. Ovary and fruit ovate. Placentas little projecting. 



Staminodes none. Small water-plants. Leaves opposite. 



Dintera, 208. Scrophulariaceae. 

 Disc rarely wanting, and then ovary and fruit linear or oblong and placen- 

 tas much projecting 213. Gesneraceae. 



594. Placentas 2. Fruit a berry or nut. Seeds exalbuminous. Shrubs or 



trees. Leaves compound 209. Bignoniaceae. 



Placentas 4. Fruit a capsule. Seeds albuminous. Herbs without 

 green colour. Leaves scale-like. Flowers irregular. 



212. Orobanchaceae. 



595. (589.) Stamens as many as the divisions of the corolla, 3 — 8. . . 596 

 Stamens more numerous than the divisions of the corolla, 7 or more. 



Shrubs or trees 600 



596. Style stigmatose beneath the thickened, often 2-lobed apex. Placentas 



2. Corolla with contorted aestivation. Flowers regular or nearly so, 



5-, rarely 4-merous. Juice milky. .... 200. Apocynaceae. 



Style stigmatose at the apex or between the apical lobes. Juice not 



milky 597 



597. Leaves and stem without green colour ; stem herbaceous, leaves scale- 



like. Flowers irregular. Stamens 4. Placentas 4. 



212. Orobanchaceae. 



Leaves green, rarely {Gentianaceae) without green colour, but then flowers 



regular, stamens 5 and placentas 2 598 



598. Leaves alternate, without stipules. Stem woody. Bark resinous. 



Flowers regular, 5-merous. Stigma i. 



Pittosporinn, 97. Pittosporaceae. 



Leaves opposite or whorled, rarely alternate or all radical, but then stem 



herbaceous 599 



599. Stem woody. Leaves opposite or whorled, usually stipulate. Flowers 



4-merous 198. Loganiaceae, 



