Kaensou - Kaensou

Japanese: カエンソウ - かえんそう
Kaensou - Kaensou

It is an evergreen, climbing perennial plant of the Rubiaceae family (APG classification: Rubiaceae), and is found in a wide area from southern Brazil to Peru and Argentina. The leaves are opposite, long ovate, and heart-shaped at the base. It differs from other species in that the leaves are hairless. The flowers grow singly in the leaf axils, are red and tubular, 4-5 cm long, and bloom from winter to spring. They have a strong emetic effect and are said to be used medicinally in their native land. They were introduced to Japan during the Kaei era (1848-1854), but are no longer cultivated. The genus Manettia has about 130 species distributed in tropical America. A closely related species, M. inflata Sprague, is found in Uruguay and Paraguay. The flowers are orange-red, tubular, densely covered with coarse short hairs on the outside, and yellow at the tip. A sturdy climbing plant that can be attached to a pole or used in a hanging pot. Flowers from winter to spring. Propagate by cuttings. Overwinter at temperatures above 8°C.

[Takabayashi Masatoshi May 21, 2021]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

アカネ科(APG分類:アカネ科)の常緑のつる性多年草で、ブラジル南部、ペルーからアルゼンチンまで広い地域に分布する。葉は対生し、長卵形で、基部は心臓形となる。葉面に毛がない点が他種と異なる。花は葉腋(ようえき)に単生し、長さ4~5センチメートル、赤色筒状で冬から春に開き、強い嘔吐(おうと)作用があり、原地では薬用に供されるという。日本には嘉永(かえい)年間(1848~1854)に渡来したが、現在は栽培されない。マネッティア属は熱帯アメリカに約130種が分布する。近縁種のアラゲカエンソウM. inflata Spragueはウルグアイ、パラグアイに分布する。花は橙赤(とうせき)色筒状で、外面に粗い短毛を密生し、先端は黄色。じょうぶなつる性草本で、支柱に添わせるか、吊(つ)り鉢作りに向く。冬から春にかけて花を開く。挿木で殖やす。8℃以上で越冬する。

[高林成年 2021年5月21日]

出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例

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