(45) 黏木
Ixonanthes reticulata
Jack (Ixonanthes chinensis Champ.)
黏木科(Ixonathaceae)

英文名 (English name): Ixonanthes

中國境內現狀:易危(VU)。已載入《中國植物紅皮書》和《廣東省珍稀瀕危植物圖譜》。
Status in China: Vulnerable(VU).Recorded in China Plant Red Data Book and Illustration of Rare & endangered plant in Guangdong Province.

形態特徵:灌木或喬木,高4-20米,樹皮褐色。葉紙質,橢圓形或橢圓狀長圓形,長6-12厘米,寬2-5厘米,頂端急尖或圓而微缺,基部闊楔尖,乾時褐色,無毛;葉柄長1-2厘米,有狹邊。二歧聚傘花序生於枝的近頂端葉腋部,具長的總花梗;花白色,直徑約6毫米;萼片5片,基部合生,卵狀長圓形,長約3毫米;花瓣5片,闊圓形,約長於萼片1.5倍;雄蕊10枚,伸出花冠外,長達2厘米。蒴果卵狀橢圓形,長2-3厘米,寬約1厘米,裂為5果瓣;種子長圓形,長0.8-l厘米,一端冠以長1-1.5厘米的翅。

地理分布:鶴咀、跑馬地、黃泥涌、香港仔、淺水灣、馬鞍山。長江流域以南各地。越南。

生境與生態:生於灌叢或疏林中。花期:5-6月:果期:6-10月。

本種雖已載入《中國植物紅皮書》,但香港分布較為普遍,未受特別威脅。

Description: Shrubs or trees, 4-20 m tall; bark brown. Leaves papery, elliptic or elliptic-oblong, 6-12 cm long and 2-5 cm long, apex acute or rounded and emarginated, base broadly cuneate, brown when dry, glabrous; petiole 1-2 cm long, narrowly winged. Inflorescence a dichasium, arising from leaf axils near branch apex, long peduncled; flowers white, ca. 6 mm in diam.; sepals 5, base connate, ovate-oblong, ca. 3 mm long; petals 5, broadly orbicular, 2.5 times as long as sepals; stamens 10, exserted, up to 2 cm long. Capsules ovoid-ellipsoid, 2-3 cm long, 1 cm wide, 5-valved; seeds ellipsoid, 8-10 mm long, with a 1-1.5 cm long wing on one end.

Distribution: Cape D'Aguilar, Happy Valley, Wong Nai Chung, Aberdeen, Repulse Bay, Ma On Shan. Areas S of Changjiang River. Vietnam.

Habitat and ecology: In thickets or thin forests. Flowering: May-June; fruiting: June-Oct.

Although this species has been recorded in the "China Plant Red Data Book", it can be found in various localities in Hong Kong and the populations are not under any particular threat.

參考文獻(References):
傅立國,1992: 中國植物紅皮書1:400-401。科學出版社,北京。
葉華谷,2000:廣東植物誌4:166。圖107。廣東科技出版社,廣州。
黎存志等,1999:香港珍稀瀕危植物的分布及保育,熱帶亞熱帶植物學報7(1):1-6。