A new species of Croton sect. Geiseleria (Euphorbiaceae) from Brazil, supported by macro- and micromorphological data

IF 1 4区生物学 Q3 PLANT SCIENCES

Phytotaxa Pub Date : 2024-05-02 DOI:10.11646/phytotaxa.646.2.4

M. D. da Silva, R. C. Sodré, A. A. Alonso, Igor Soares DOS SANTOS

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Abstract

Taxonomic studies on the genus Croton in the Midwest region of Brazil enabled the analysis of about 700 collections from all over the country. Three of these collections were identified as a new species, Croton piriquetifolius, which is described and illustrated here. We also give a preliminary evaluation of its conservation status, provide data on flowering and fruiting seasons, geographic distribution environmental preferences, as well as its systematic position. The new species is compared macro- and micromorphologically with C. adamantinus, C. glandulosus and C. eremophilus, with which it resembles or has been confused in herbaria. Morphological (e.g., presence, shape, and location of the acropetiolar nectaries, presence, and distribution of glands on stipules, presence, and size of pedicel on pistillate flower, integrity of styles, type, and location of trichomes) and anatomical (e.g., disposition of the stomata, contour of petiole and midrib, organization of vascular bundles, type of mesophyll, and types of trichomes) characters serve to differentiate the species studied.

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来自巴西的 Croton sect.来自巴西的新种（大戟科），有宏观和微观形态学数据支持

对巴西中西部地区巴豆属植物的分类研究分析了来自全国各地的约 700 个采集样本。在这些采集物中，有三个被鉴定为新种，即 Croton piriquetifolius，本文对其进行了描述和图示。我们还对其保护状况进行了初步评估，提供了关于开花和结果季节、地理分布环境偏好以及其系统位置的数据。在宏观和微观形态上，我们将该新物种与 C. adamantinus、C. glandulosus 和 C. eremophilus 进行了比较。形态（如顶端蜜腺的存在、形状和位置，托叶上腺体的存在和分布，雌花花梗的存在和大小，花柱的完整性，毛状体的类型和位置）和解剖（如气孔的分布，叶柄和中脉的轮廓，维管束的组织，中叶的类型和毛状体的类型）特征有助于区分所研究的物种。

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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.

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