Flora of the Malayan Peninsula. 375 



Order LXXXVII. BIGNONIACE^. 



Trees or climbing shrubs, more rarely herbs. Leaves opposite, 

 rarely whorled or alternate, entire or 1- 2- 3-pinnate or digitate ; 

 leaflets entire or sometimes toothed. Inflorescence of terminal racemes 

 or panicles ; bracts various ; flowers showy, usually large, hermaphro- 

 dite, irregular or regular. Calyx gamosepalous, campanulate, truncate 

 or spathaceous or 2-5-lobed, valvate. Corolla gamopetalous, tubular- 

 ventricose, mouth 2-lipped ; lobes 5, sub-equal, patent or erecto-patent, 

 bilabiately imbricate in bud. Stamens alternate with the corolla-lobes, 

 inserted on the tube, 5 or more usually 4 from the fifth being absent 

 or rudimentary ; filaments filiform, often slightly thickened and some- 

 times hairy at the base ; anthers 2 -celled, included or shortly exsert ; 

 cells oblong or linear, parallel or divergent, dehiscing longitudinally. 

 Dish hypogynous, cushion-like or annular, sometimes absent. Ovary 

 sessile or shortly stalked, superior, 1-2-celled ; style long, filiform ; 

 stigma of 2 flattened ovate or oblong lobes ; ovules numerous, usually 

 horizontal, anatropous, inserted in 2 to many rows in vertical lines along 

 the edges of the septum in each cell. Fruit generally an elongate 

 capsule, loculicidally or septicidally bivalved; the septum enlarged in 

 fruit, deciduous together with the placentas. Seeds transverse, affixed 

 by their margins to the septum or to enlarged placentas, vertically 

 compressed, discoid or trigonous, often with a broad wing, embryo 

 usually enveloped in a fine interior membrane ; exalbuminous, coty- 

 ledons flattened, sometimes folded, radicle stout, lateral. — Distkib. 

 Tropical regions of the world, a few in warm temperate regions ; 

 absent from Europe, the Mediterranean region and New Zealand. 

 Species about 50. 



Stamens 5 ; a tree with opposite 2-3-pinnate leaves and very- 

 large flat capsules . . . . . . . . 1. Oroxylum. 



Stamens 4 ; trees : — 

 Anther-cells 2, both perfect : — 

 Leaves 1-3-pinnate : — 



Calyx spathaceous, split on one side . . . . 2. Dolichandrone. 



Calyx lobed or truncate : — ■ 



Septum of the capsule cylindric, spongy : — 



Septum prominently pitted ; seeds trigonous, trans- 

 versely grooved without, inner lobe fitting into the 

 septum-pit; ovules 2-seriate in each cell. . . . 3. Stereospekmum. 



Septum only faintly pitted ; seeds flat ; ovules many- 

 seriate in each cell . . . . . . 4. Radermacheea. 



Septum flat, capsule winged ; a large tree with large 



flowers . . . . . . . . . . 5. Pajanelia. 



