A Taxonomic Revision of Chamaecrista (Caesalpinioideae, Cassieae, Cassiinae) in Southern Africa

IF 0.9 3区 生物学 Q4 EVOLUTIONARY BIOLOGY
L. Musandiwa, A. Magee, J. Boatwright
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引用次数: 0

Abstract

Abstract The southern African species of Chamaecrista were all treated under Cassia in Gordon-Gray's treatment for the Flora of Southern Africa. However, given the subsequent generic recircumscriptions in the subtribe Cassiinae, and the expanded collections of these taxa, there is a need to revisit the taxonomy of the group. The present study aimed to conduct a detailed taxonomic revision of the species of Chamaecrista indigenous to the flora of southern Africa region. Extensive fieldwork was carried out to study the taxa in their natural environment and morphological characters were additionally studied using herbarium material. The revision presented here includes comprehensive descriptions, a key to the species, nomenclature, typifications, diagnostic characters with illustrations, and geographical distribution maps of all recognised taxa. Eleven species of Chamaecrista are recognised for the flora of southern Africa, two of which are described as new, i.e. Chamaecrista grandiglandulata and C. gordon-grayei. In addition, one new subspecies is described, namely C. gordon-grayei subsp. longipedicellata, while Chamaecrista comosa var. capriconia is raised to the rank of subspecies, viz. Chamaecrista comosa subsp. capriconia. The typifications published here include lectotypes designated for Chamaecrista plumosa and C. stricta, neotypes designated for C. capensis var. flavescens, C. comosa, and C. plumosa var. diffusa, and an isolectotype designated for C. stricta.
标题南部非洲樟树属(樟树科,樟树科,樟树科)的分类学修订
摘要Gordon Gray对南部非洲植物区系的处理中,南部非洲的Chamaecrista种均采用决明处理。然而,考虑到随后在卡西亚科中的一般再循环描述,以及这些分类群的扩展集合,有必要重新审视该类群的分类学。本研究旨在对原产于南部非洲地区植物区系的Chamaecrista物种进行详细的分类学修订。进行了广泛的实地调查,以研究其自然环境中的分类群,并使用植物标本馆的材料进一步研究了形态特征。这里介绍的修订包括全面的描述、物种的关键、命名法、典型化、带插图的诊断特征以及所有公认分类群的地理分布图。在南部非洲的植物区系中,有11种Chamaecrista已被确认,其中两种被描述为新物种,即Chamaecristo grandgladurata和C.gordon grayei。此外,还描述了一个新的亚种,即C.gordon grayei亚种。长蒂花,而长蒂花Chamaecrista comosa var.capriconia被提升到亚种的级别,即Chamaecrita comosa subsp。任性。这里公布的类型包括为羽冠Chamaecrista plumbosa和C.stricta指定的选型,为C.capensis var.flavescens、C.comosa和C.plumbosavar.diffusa指定的新类型,以及为C.strictia指定的异分型。
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来源期刊
Systematic Botany
Systematic Botany 生物-进化生物学
CiteScore
1.80
自引率
10.00%
发文量
72
审稿时长
6-12 weeks
期刊介绍: Systematic Botany Monographs is a series of peer-reviewed taxonomic monographs and revisions published the American Society of Plant Taxonomists. ISSN 0737-8211, ISBN prefix 978-0-912861. No; volumes of Systematic Botany Monographs must be ordered separately. ASPT membership inludes only a subscription to the quarterly journal Systematic Botany. SBM is supported by sales, author"s subsidies, and donations.
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