特徵描述
作者
CHANG, CHING-EN
型態特徵
Trees or shrubs. Leaves alternate, estipulate, mostly pinnate, usually not glandular punctate; leaflets opposite or alternate, usually quite entire and more or less oblique at base. Flowers usually unisexual (plant dioecious), rarely hermaphroditic, usually in axillary cymose panicles; calyx 3–6-lobed, or with free sepals, usually imbricate in bud; corolla contorted or imbricate, the petals 4–5 (rare 3 or 6 or more), distinct or connate, or adnate to the staminal tube and then valvate; stamens 5–10, hypogynous, mostly monadelphous by the connate filaments (distinct in Cedrela and Toona), the anthers erect, usually sessile on the tube, included or exserted, 2-celled, longitudinally dehiscing; hypogynous disc tubular, annular or obsolate, free or connate with the ovary, ovary usually free, 2–5 celled, the style single, the stigma disciform or capitate; ovules 1–2 in each cell or more, collateral or superposed. Fruit a berry, capsule, or rarely a drupe. Seeds often winged, endosperm fleshy or none.
屬
About 50 genera and 800 species, mostly tropical, widely spread over both hemispheres.
參考文獻
Chisocheton 擬檻木屬
作者
CHANG, CHING-EN
型態特徵
Trees or shrubs. Leaves pinnate with an intermittently growing terminal bud, very rarely with a termminal leaflets; leaflets with pellucid lines or dots or not. Flowers unisexual, in axillary or supra-axillary panicles, often long and narrow and thyrsiod or almost racemose, rarely 3–6-lobed to the middle; petals 3–5 in a single whorl, free, imbricate or valvate, rarely united below or fused at the base to the staminal tube; staminal tube cylindrical, sometimes expanded at the mouth, with an entire or crenate margin, or terminated by 4–10 emarginate, truncate, narrowly lanceolate or bilobed appendages, usually attached within the throat of the staminal tube and then completely included or partly exserted, rarely inserted on the margin; staminodes very slender, indehiscent, without pollen; disc narrowly or broadly stipitate, annular, or absent; ovary 2–7-celled, with 1–2 ovules in each cell; pistillode very slender, the unexpanded base of the style sunk in the disc. Fruit a 2–5-valved loculicidal capsule, often stipitate or rostrate.
