Alexa duckeana (Leguminosae-Papilionoideae): a new species from the Brazilian Amazon

IF 1 4区生物学 Q3 PLANT SCIENCES

Phytotaxa Pub Date : 2023-12-07 DOI:10.11646/phytotaxa.629.3.7

G. S. Silva, Benjamin MARLAND TORKE, V. Mansano

引用次数: 0

Abstract

Alexa (Leguminosae, Papilionoideae) comprises nine species of Amazonian trees. An updated analysis of morphological variation in the genus indicated that material identified as Alexa grandiflora in herbaria constituted two distinct species, one of which appeared to be new. Subsequent fieldwork further supported the distinction. Here, we describe the new species, Alexa duckeana, which differs from A. grandiflora, most notably by lacking extrafloral glands and by having shorter pedicels and shorter racemes with more congested flowers. Alexa duckeana occurs only in the southeastern region of Pará, in northern Brazil. We assess its conservation status as Endangered. In addition to the description, we provide an illustration and distribution map for the new species, taxonomic comparisons, and an identification key for the species of Alexa that occur in Brazil.

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Alexa duckeana（豆科-鸭跖草属）：巴西亚马逊河流域的一个新物种

Alexa(豆科，凤蝶科)包括9种亚马逊树木。对桔梗属植物形态变异的最新分析表明，在植物标本室中鉴定为桔梗属的材料由两个不同的种组成，其中一个似乎是新种。随后的实地调查进一步证实了这一区别。在这里，我们描述了一个新的物种，Alexa duckeana，它不同于A. grandflora，最明显的是缺乏花外腺体，花梗更短，总状花序更短，花更密集。Alexa duckeana只出现在巴西北部的par东南部地区。我们评估其保护状况为濒危。此外，我们还提供了新物种的图解和分布图、分类比较以及巴西Alexa物种的识别密钥。

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

Phytotaxa PLANT SCIENCES-

CiteScore

1.90

自引率

27.30%

发文量

956

审稿时长

1 months

期刊介绍： Phytotaxa is a peer-reviewed, international journal for rapid publication of high quality papers on any aspect of systematic and taxonomic botany, with a preference for large taxonomic works such as monographs, floras, revisions and evolutionary studies and descriptions of new taxa. Phytotaxa covers all groups covered by the International Code of Nomenclature foralgae, fungi, and plants ICNafp (fungi, lichens, algae, diatoms, mosses, liverworts, hornworts, and vascular plants), both living and fossil. Phytotaxa was founded in 2009 as botanical sister journal to Zootaxa. It has a large editorial board, who are running this journal on a voluntary basis, and it is published by Magnolia Press (Auckland , New Zealand). It is also indexed by SCIE, JCR and Biosis. All types of taxonomic, floristic and phytogeographic papers are considered, including theoretical papers and methodology, systematics and phylogeny, monographs, revisions and reviews, catalogues, biographies and bibliographies, history of botanical explorations, identification guides, floras, analyses of characters, phylogenetic studies and phytogeography, descriptions of taxa, typification and nomenclatural papers. Monographs and other long manuscripts (of 60 printed pages or more) can be published as books, which will receive an ISBN number as well as being part of the Phytotaxa series.