中国でウリ科植物の新種を発見(Scientists Discover New Cucurbitaceae Species Herpetospermum motuoensis in China)

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2025-04-17 中国科学院(CAS)

中国でウリ科植物の新種を発見(Scientists Discover New Cucurbitaceae Species Herpetospermum motuoensis in China)Herpelospermum motuoensis. A. Habitat; B. Habit; C. Tendril; D. Leaves; E. Male inflorescence; F. Top view of male flower; G. Back view of male flower; H. Longitudinal section of male flower; I. Top view of female flower; J. Back view of female flower; K. Longitudinal section of female flower; L. Fruits; M. Longitudinal section of fruit; N. Cross section of fruit; O. Seeds. A-O: all photos by BuYun Zhang based on the type, B. Y. Zhang, Y D. Xu, G. F. Liu et X.R. Zheng JZ20231191 (IBSC).(Imaged by CHEN et al)

中国科学院華南植物園と西蔵大学などの研究チームは、中国西蔵自治区墨脱県でウリ科の新種植物「Herpetospermum motuoensis」を発見しました。この植物は雌雄異株のつる性植物で、成熟果実が蓋状に裂開する特徴を持つ既知種H. operculatumに近縁ですが、花の苞や柱頭、果実・種子の形状などで明確に区別されます。本種は標高1300~2500mの低木林や森林縁に分布し、現在確認されている5個体群のうち1つは道路沿いにわずか4個体しか存在せず、開発の影響で絶滅の危機に瀕しています。この発見は中国におけるウリ科植物の多様性を高め、分類学的研究に新たな知見を提供します。

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中国・西蔵の新種Herpetospermum motuoensis(ウリ科)の発見 Herpetospermum motuoensis (Cucurbitaceae), a new species from Xizang, China

BU-YUN ZHANG,HOU-ZHOU LIU,YE-CHUN XU,ZHU-QIU SONG,YOU-SHENG CHEN

Phytotaxa  Published:2025-04-17

DOI:https://doi.org/10.11646/phytotaxa.697.3.8

Abstract

Herpetospermum motuoensis (Cucurbitaceae: Schizopeponeae) is described and illustrated as a new species. It is similar to Herpetospermum operculatum but can be easily distinguished by the inconspicuous bracts of the male flowers (vs. bract of male flowers prominent), petals subrounded to elliptical (vs. petals ovate to obovate), ovules 6 per locule (vs. ovules 8 per locule), stigma subrounded to broadly elliptic (vs. stigma oblong–ovate), fruits are chartreuse, fusiform to ellipsoid–fusiform and glabrous (vs. oblong to ellipsoid–fusiform and pubescent), seeds are irregular oblong-hexagonal, margin with protrusion at each corner (vs. seed ± round, margin with irregular acute erose).

1204農業及び蚕糸
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