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Aeschynanthus acuminatus

Aeschynanthus acuminatus

Aeschynanthus acuminatus

Aeschynanthus acuminatus

わが国の南西諸島、西表島それに台湾や中国南部、東南アジア、ヒマラヤ周辺に分布しています。森林地帯の谷間や川辺に生え、半蔓性で樹木や岩上に着生します。葉は披針形から楕円形または狭長楕円形で革質、対生します。茎の先端付近に緑色からオレンジ色の筒状花を咲かせます。果実は刮ハで長さ15センチほどと細長く、それが和名の由来になっています。台湾華語では「長果藤」。 
イワタバコ科エスキナンサス属の常緑小低木で、学名は Aeschynanthus acuminatus (syn. Trichosprum acuminatum)。英名は Tapering-leaf basketvine。 
The Tapering-leaf basketvine (Aeschynanthus acuminatus) belongs to Gesneriaceae (the African violet family). It is an evergreen shrub that is distributed to Iriomote Island in the Nansei Islands of Japan, Taiwan, southern China, Southeast Asia, and the Himalayas. It grows in valleys and along riversides in forested areas. It is semi-vining and grows on trees and rocks. The leaves are lanceolate to elliptic or narrowly oblong, leathery, and opposite. The green to orange tubular flowers bloom near the stem tips. The fruit is a capsule, about 15 cm long and slender, which is the origin of its Japanese name. In Taiwanese, it is called "長果藤". 
茨城県つくば市「つくば実験植物園」にて、2022年01年16日撮影。 

Shu Suehiro
shu@botanic.jp