Hevea  

Tree, monoecious. Exudate present, white. Unarmed*. Indumentum present (mostly on inflorescences), hairs simple. Stipules free*, simple, unlobed, entire *, not spine-like*, not leaf-like*, without glands. Leaves distributed evenly along stem or crowded towards twig tips, alternate, compound, leaflets unlobed, base symmetrical, margin toothed or entire, leaf blade not pellucid-punctate; venation pinnate; domatia absent*; stipels absent*. Petiole present, with or without swellings or bends at base or apex*, glandular at apex. Inflorescence with axis, axillary or cauline, panicle-like, bisexual, males and females opening at different times; bracts small, entire, not leaf-like*, green; pedicels absent (sometimes in females) or present, not articulated*. Male flowers: pedicels present; sepals 5, valvate, partially fused, greenish; petals 0; disc glands 5, outside the staminal whorl (extrastaminal), free or fused; stamens 5–10, completely fused; anther without conspicuous modification. Female flowers: pedicels present or absent; sepals 5; valvate, partially fused, greenish; petals 0; disc minute, surrounding the ovary, annular, or disc 0; ovary locules 3–4, ovules per locule 1; styles 3–4, free or almost so, entire or very slightly 2-branched, styles or stigmas not flat*, surface smooth*; staminodes absent. Fruit dehiscent, not sculptured*, glabrous or hairy, greenish to brown; seed without appendage, covering or membraneous layer*, not fleshy; embryo flat, not minute, cotyledons leaf-like*.

An asterisk * indicates a state has been assumed but not yet confirmed.

World Checklist: 9 spp.