Gymnosiphon mayottensis Cheek, sp. nov. (Burmanniaceae) a new species from Mayotte, Comoro Islands

IF 0.7 4区生物学 Q4 PLANT SCIENCES

Adansonia Pub Date : 2020-05-25 DOI:10.5252/adansonia2020v42a8

M. Cheek, Sebastien Traclet

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引用次数: 1

Abstract

ABSTRACT A new species of Gymnosiphon Blume (Burmanniaceae), G. mayottensis Cheek, sp. nov. is formally described from Mount Bénara and Mount Mtsapéré on the island of Mayotte in the Comores. This is the first named species of the genus published from the Comoro Islands. The new species resembles G. longistylus (Benth.) Hutch. in the six long, filamentous, stigma appendages, two arising from each of the three styles, also in the absence of an underground tuber or thickened rhizome; it differs in that the bracts are appressed to the rhachises, and about equal in length to them (not patent, and < ¼ as long), the outer tepals turn rapidly from white to translucent at anthesis (not remaining white), the inner perianth lobes are absent (not present and conspicuous), the stigmas are broader than long, held horizontally and are united along their lateral margins (not longer than broad, pendulous, free from each other along their lateral margins). The new species is known from two forest sites, both with threats, and less than 50 individuals are known. Accordingly, it is assessed as Critically Endangered (B1ab(i-iv), B2ab(i-iv), D) using the IUCN 2012 standard. The new species is illustrated by colour photos and line drawings, and mapped.

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科摩罗群岛马约特岛Gymnosiphon mayottensis Cheek, sp. 11 .(缅甸科)一新种

摘要在科摩罗马约特岛的bsamapnara山和mtsapacri山正式描述了一新种Gymnosiphon Blume(缅甸科)，G. mayottensis Cheek, sp. nov.。这是科摩罗群岛公布的该属的第一个命名物种。新种与长针藓属(底纲)相似。厨。在六个长，丝状，柱头附属物中，从三个花柱中的每一个产生两个，也在没有地下块茎或加粗的根茎;它的不同之处在于苞片贴在颈鼻上，大约与颈鼻等长(不是显性的，小于1 / 4长)，外部花被片在开花期迅速从白色变为半透明(不是剩余的白色)，内部花被裂片不存在(不存在和不明显)，柱头宽长于长，保持水平，沿其侧缘联合(不长于宽，下垂，沿其侧缘彼此独立)。新物种是在两个森林遗址发现的，都受到威胁，已知的个体不到50个。因此，根据IUCN 2012年的标准，它被评估为极度濒危(B1ab(i-iv)， B2ab(i-iv)， D)。新物种通过彩色照片和线条图加以说明，并绘制了地图。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Adansonia 生物-植物科学

CiteScore

1.30

自引率

12.50%

发文量

审稿时长

>12 weeks

期刊介绍： Adansonia is a fast-track and peer-reviewed journal of plant biology, devoted to the inventory, analysis and interpretation of vascular plants biodiversity. It publishes original results, in French or English, of botanical research, particularly in systematics and related fields: morphology, anatomy, biology, ecology, phylogeny, biogeography, etc. All articles published in Adansonia are compliant with the different nomenclatural codes. A copyright assignment will be signed by the authors before publication.