Publication Date:
2015-04-20
Description:
Trees or shrubs, buds with many perules. Leaves decussate, petiolate, entire, palmate or pinnate, appearing simultaneously with the flowers or later, exstipulate. Inflorescence racemose, corymbose or spicate, terminal with 2-4 leaves, or rarely terminal or axillary without leaves. Monoecious or dioecious, flowers actinomorphic, ♂ and ♀, ovary in the ♂ fls more reduced than stamens in ♀ fls. Calyx and corolla 4-5-merous. Stamens 4-10, mostly 8, hypogynous or perigynous. Disc extraor intrastaminal. Ovary superior, 2-celled, laterally flattened, each cell with 2 ovules. Fruit a samara, splitting into 2, rarely 3, winged usually 1-seeded parts. Seed without endosperm, radicle elongate, cotyledons foliaceous, or thickened, plicate, involute or flat.
Distr. Ca 200 spp. in the N. hemisphere, only in Malaysia crossing the equator.
Repository Name:
National Museum of Natural History, Netherlands
Type:
Article / Letter to the editor
Format:
application/pdf
