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Neotropical Euphorbiaceae s.l.
Conceveiba
SUMMARY
Trees, shrubs or scramblers, dioecious or rarely monoecious. Exudate absent*. Unarmed*. Indumentum present, hairs stellate (at least in part). Stipules 0 or present, small, or large and conspicuous, free*, simple, unlobed, entire *, not spine-like*, sometimes leaf-like*, without glands. Leaves distributed evenly along stem, alternate, simple, unlobed, base symmetrical, margin entire to toothed, teeth glandular, blade not pellucid-punctate; glands at leaf base and/or throughout blade absent or present; venation pinnate or with 3 veins from base; domatia often present; stipel-like appendages absent*. Petiole present, without swellings or bends at base or apex*, without glands. Inflorescence with axis, axillary or terminal, racemose, spicate or corymbose; in female inflorescence bracts and bracteoles with or without glands at base, not leaf-like*, green; pedicels present or absent, not articulated*. Male flowers: sepals 2–4, valvate, partially fused, greenish; petals 0; disc 0; stamens 8–15 with 3–35 staminodes also present, or 20–60 all fertile, free or fused at base; anther with conspicuous modification (thecae), thecae bud introrse or latrorse; pistillode absent. Female flowers: sepals 4–9; valvate, imbricate or neither, free to completely fused; with or without glands near base; greenish; petals 0; disc 0; ovary locules 2–3, ovules per locule 1; styles 2–3, free or fused at base, 2-branched (i.e. ultimate divisions per locule 2), styles or stigmas flat or not flat*, surface papillose; staminodes absent. Fruit dehiscent, smooth, warty, tuberculate or wrinkled, glabrous or hairy, greenish to brown; seed carunculate, with no other covering or membranous layer; embryo flat*, not minute*, cotyledons leaf-like*.
An asterisk * indicates a state has been assumed but not yet confirmed.
World Checklist: 14 spp. See: Secco, R. S. (2004) Alchorneae (Euphorbiaceae) (Alchornea, Aparisthmium, Conceveiba), Flora Neotropica Monograph 93. Organization for Flora Neotropica. New York Botanical Garden, Bronx, New York, U.S.A.