One-leafed jasmine - One-leafed jasmine

Japanese: ヒトツバタゴ - ひとつばたご
One-leafed jasmine - One-leafed jasmine

A deciduous tree of the family Oleaceae (APG classification: Oleaceae). It grows to a height of 15-20 meters. The leaves are opposite, oblong, 4-10 cm long, and have long stalks. Dioecious. In May, it produces a panicle-shaped cyme, which blooms with many white flowers. The corolla is 1.5-2 cm long, deeply divided into four lobes, and has thin lobes. Male flowers have two stamens, and female flowers have one pistil. The fruit is broadly elliptical, 1-1.5 cm long, and ripens black in October. It grows in marshes and is distributed discontinuously in Aichi, Gifu, Nagano, Tsushima, the Korean peninsula, Taiwan, and China. The native habitats in Gifu, Aichi, and Nagasaki are protected as national natural monuments. It is planted as a park tree or garden tree for its flowers. In China, the leaves are used as a substitute for tea. The name was chosen because it was thought to be a member of the compound-leafed tago (a dialect word for ash). It was originally located in the outer gardens of Meiji Shrine, and was called Nanjamonja noki because it was a rare tree whose name was unknown. There is another species in the genus Chionanthus in eastern North America.

[Yoshio Kobayashi July 16, 2021]

One-leaf clover
In May, it produces cone-shaped cymes and blooms numerous white flowers. ©Shogakukan ">

One-leaf clover


Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

モクセイ科(APG分類:モクセイ科)の落葉高木。高さ15~20メートル。葉は対生し、長楕円(ちょうだえん)形で長さ4~10センチメートル、長い柄がある。雌雄異株。5月、円錐(えんすい)状集散花序をつくり、多数の白色花を開く。花冠は長さ1.5~2センチメートル、深く4裂し、裂片は細い。雄花は雄しべ2本、雌花は雌しべ1本。果実は広楕円形で長さ1~1.5センチメートル、10月、黒く熟す。湿地に生え、愛知県、岐阜県、長野県、対馬(つしま)、および朝鮮半島、台湾、中国に不連続分布する。岐阜、愛知、長崎県の自生地は国の天然記念物として保護されている。公園木や庭木として植栽し、花を観賞する。中国では葉を茶の代用にする。名は、複葉のタゴ(トネリコの方言)の仲間と思い、単葉のタゴの意味でつけられた。もとは明治神宮外苑(がいえん)にあり、名前のわからない珍木ということでナンジャモンジャノキとよばれていた。ヒトツバタゴ属はこのほか、北アメリカ東部に1種ある。

[小林義雄 2021年7月16日]

ヒトツバタゴ
5月、円錐状の集散花序をつくり、多数の白色花を開く©Shogakukan">

ヒトツバタゴ


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