Olacaceae
鐵青樹科
特徵描述
作者
YANG, YUEN-PO and LU, SHENG-YOU
型態特徵
Evergreen or deciduous trees or shrubs. Leaves simple, alternate, entire, petiolate, estipulate. Flowers in spikes, racemes, panicles, or cymes, bisexual, actinomorphic; calyx connate into a tube, the tube cup- or disc-like, accrescent or not in fruit, slightly lobed or truncate; petals usually 4–5, free or connate, valvate; disc various, often annular; stamens as many as and opposite the petals, reduced stamens sometimes present, anthers 2-locular, opening lengthwise by pore-like slits; ovary slightly immersed in the disk, 1–3(5)-celled, each cell with 1–5 ovules, placenta axile, free central or pendulous. Fruit a nut or drupe, enclosed by the enlarged calyx tube or not; seed 1, embryo straight, endosperm copious.
屬
About 26 genera with about 260 species in the tropics or subtropics. Two genera and two species in Taiwan.
參考文獻
Olax 鐵青樹屬
作者
YANG, YUEN-PO and LU, SHENG-YOU
型態特徵
Shrubs. Leaves alternate, entire, petiolate. Flowers in axillary racemes or panicles; pedicels bracteate, short; calyx cup-like, truncate or slightly toothed, enlarged when fruiting; petals 3–5, free or somewhat connate at base; stamens 3, opposite the petals; staminodia 6; ovary superior, 1-celled above, 3-celled below, 3-ovuled, stigma 3-lobed.
About 55 species in tropical and subtropical regions of the world. One species in Taiwan.
