CHORIPETALAE 



35 



386. Leaves opposite, undivided. Ovules ascending or horizontal. Seeds 



exalbuminous 149. Guttiferae. 



Leaves alternate 387 



387. Sepals 2. Petals 4 — 5, imbricate in bud. Filaments free. Anthers 2- 



celled. Disc cup-shaped. Ovary 2-celled. Ovules ascending. Style 



I, two-cleft Talinella, 73. Portulacaceae. 



Sepals 5. Disc wanting. Ovary 3 — 5-celled. Ovules pendulous. Styles 

 3 — 5, free or united at the base 388 



388. Flowers unisexual, in glomerules. Petals in the male flowers 3, \-alvate 



in bud. Anthers 4-celled. . . . Junodia, 122. Euphorbiaceae. 



Flowers hermaphrodite, in panicles. Petals 5, imbricate in bud. Anthers 



2-celled 148. Theaceae. 



389. (319.) Style I, undivided, with a single stigma or with two or more stig- 



mas contiguous at the base, or one sessile stigma 390 



Styles 2 or more, free or united below, but not to the base of the stigmas, 

 or two or more free sessile stigmas 439 



390. Stamens fewer than twice as many as the petals 391 



Stamens twice as many as the petals or more 404 



391. Petals and stamens hypogynous 392 



Petals, and usually also the stamens, more or less perigyiious. Leaves 



undivided. 399 



392. Stamens 7 — 9, free. Sepals 3 or 5, petals 5, both with contorted 



aestivation. Flowers regular. Leaves entire. . . 154. Cistaceae. 

 Stamens 2 — 6 393 



393. Ovary 2-celled. Stamens 6, rarely 2 or 4. Sepals 4, petals 4. Recep- 



tacle with glands. Leaves simple, without stipules, but often with 



auricles at the base 88. Cruciferae. 



Ovary 3- or more-celled. Stamens 4 — 5 394 



394. Sepals valvate in bud, united below. Filaments usually united. Disc 



wanting. Leaves stipulate 395 



Sepals imbricate or open in bud, free or nearly so, rarely evidently united, 

 but then leaves exstipulate. Filaments free ; anthers sometimes 

 united. 396 



395. Anthers opening by i slit. Leaves palmately compound. Trees. 



Ceiha, 143. Bombacaceae. 

 Anthers opening by 2 slits or pores. Leaves simple. 



144. Sterculiaceae. 



396. Anthers united, opening at the apex. Stamens 5. Disc wanting. 



Petals 3 or 5. Sepals 3 or 5, one of them spurred. Herbs. Leaves 



undivided, exstipulate. . . Impatiens, 136. Balsaminaceae. 



Anthers free, opening lengthwise 397 



397. Flowers irregular. Stamens usually fewer than the petals. Disc present. 



Ovary 4 — 5-celled. Albumen abundant. Shrubs or trees. Leaves 

 alternate, pinnate Melianthus, 135. Melianthaceae. 



