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

被引：1

作者：

Da Silva, Guilherme Sousa ^{[1
]}

Torke, Benjamin M. ^{[2
]}

Mansano, Vidal de Freitas ^{[3
]}

机构：

[1] Univ Estadual Campinas, Inst Biol, Programa Pos Graduacao Biol Vegetal, Rua Monteiro Lobato 255, BR-13083862 Campinas, SP, Brazil

[2] New York Bot Garden, Inst Systemat Bot, 2900 Southern Blvd, Bronx, NY 10458 USA

[3] Inst Pesquisas Jardim Bot Rio de Janeiro, DIPEQ Rua Pacheco Leao 915, BR-22460030 Rio De Janeiro, RJ, Brazil

来源：

PHYTOTAXA | 2023年 / 629卷 / 03期

基金：

美国国家科学基金会;

关键词：

Fabaceae; Para state; Plant taxonomy; Tropical Forest;

D O I：

10.11646/phytotaxa.629.3.7

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

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 Para, 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.

引用

页码：255 / 265

页数：11

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