Ruehssia bahiensis: a new species of Apocynaceae endemic to a floristically neglected area within the Semi-arid of Bahia, Brazil

IF 1 4区生物学 Q3 PLANT SCIENCES

Phytotaxa Pub Date : 2023-12-06 DOI:10.11646/phytotaxa.629.2.4

Ilana C. Oliveira, F. S. E. Santo, A. Rapini, M. C. Dórea, R. P. Oliveira

引用次数: 0

Abstract

Ruehssia belongs to the Apocynaceae, tribe Marsdeniae, including all neotropical species of this family with erect pollinia. This genus includes about 110 species, 44 of which occur in Brazil. In recent floristic surveys conducted within the Semi-arid region of Bahia state, Northeast Brazil, a new species of Ruehssia was recognised, which is herein described and illustrated. It resembles R. pickelii (Fontella & Morillo) F.Esp.Santo & Rapini, known from the caatinga vegetation in Pernambuco, Paraíba and Rio Grande do Norte states, but has the corolla lobes adaxially pubescent (vs glabrous), corona lobes shorter than (vs as high as) the gynostegium and an exserted, conical (vs inserted and subglobose) style-head apex. The newfound species is named R. bahiensis and is known from only three locations, two within the “sisal territory” and one in the region of Feira de Santana. All these locales are floristically underexplored and have undergone an extensive transformation into pasture and agricultural land.

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Ruehssia bahiensis：巴西巴伊亚州半干旱地区被忽视的植物新种

部落Marsdeniae Ruehssia属夹竹桃科,包括所有热带物种建立花粉块的这个家庭。该属包括约110种，其中44种出现在巴西。最近在巴西东北部巴伊亚州半干旱区进行的植物区系调查中，发现了一种新的ruehsia，本文对其进行了描述和说明。它类似于r.p ickelii (Fontella & Morillo) f.sp . santo & Rapini，从Pernambuco, Paraíba和Rio Grande do Norte州的caatinga植被中已知，但具有花冠裂片正面短柔毛(相对于无毛)，花冠裂片短于(相对于)雌蕊蕊和外露的圆锥形(相对于插入和近球形)柱头先端。新发现的物种被命名为R. bahiensis，只在三个地方发现，两个在“剑麻领地”，一个在费拉德桑塔纳地区。所有这些地区的植物种类都未得到充分开发，并经历了广泛的转变，成为牧场和农业用地。

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.