生活型

tree-shrub

形態特徵

• Shrubs or arborescent.
• Leaves simple, alternate, coriaceous, lanceolate or linear-lanceolate, 6–12 cm long, 0.5–1.5 cm wide, acute to acuminate at apex, attenuate at base, entire, glabrous on both surfaces, green above, paler beneath, the lateral veins over 20 pairs, inconspicuous; petiole short, 4–6 mm long, glabrous.
• Inflorescence shortly terminal paniculate about half as long as leaf. Flowers dioecious or monoecious, unisexual or hermaphroditic, small, yellowish green to about 4 mm across; sepals 5; petals absent; stamens 8 in the male flowers, filaments very short, anthers rather large; ovary ovoid in female flowers, 3-celled, style slender, stigma 2-lobed.
• Fruit a samara, compressed, 2-winged, the wings about 1 cm long, 1–1.2 cm wide. Seeds ovoid or rounded, black, shining.

分布

• 台灣 : from seashore to 1500 m high in altitude throughout the island on exposed field or riverside.
• 世界 : Pantropic.

引證標本

TAIPEI: Neihu, Lee s. n. 1970. TAICHUNG: Taichung, Wang s. n. 1977; Tagea, Kawakami 15772. NANTOU: Sun-Moon Lake, Yang 51103; Guandaushi, Ou 4523. PINGTUNG: Hengchun, Sasaki 15768; Jeoubon, Chang 2503. TAITUNG: Hoping, Liao 11552; Is. Lutao, Chang 22904. HUALIEN: Hsiukuluanshi, Liu 1879.

引用文獻

• CHEN, CHING-HSIA, Flora of Taiwan, second edition 3: 602. 1993.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)