Kew Bulletin最新文献

Gentiana albomarginata C.Marquand was proposed as a replacement name for G. albescens (Franch.) Franch. ex Kusn., which was long considered as a later homonym of G. albescens Favre. However, G. albescens Favre was actually not validly published. Therefore, G. albescens (Franch.) Franch. ex Kusn. is the correct name for the species, and G. albomarginata is nomenclaturally superfluous and illegitimate.

Cyprus is located in the eastern part of the Mediterranean, which is considered one of the world’s richest biodiversity hotspots characterised by high rates of endemism. Many Cypriot plant species are threatened with extinction, urging conservation action. This study aims to assess the progress made so far in the ex situ conservation of threatened plants of the flora of Cyprus, to identify gaps and to set priorities for future activities. The criteria taken into account for the analysis were: (1) IUCN threat category; (2) regional responsibility; (3) legal responsibility; (4) number of known locations; (5) number of known locations with ex situ conservation; (6) number of accessions of unknown collecting location; and (7) occurrence within protected areas. In total, 158 of the 263 threatened taxa (60.08%) have at least one accession in conservation. The percentage of locations from which there are accessions conserved, compared to the total number of known locations is low (24.20%). Only 17.49% of the threatened taxa have accessions conserved from all known locations and are, therefore, effectively conserved ex situ. The percentage of threatened taxa conserved ex situ is lower than the target of 75%, set by the Global Strategy for Plant Conservation (GSPC) Target 8 (CBD 2012), urging additional conservation action. A priority list of threatened species has been established, which can be used as a tool for future planning of conservation activities.

A new species of the Marlierea group of Myrcia sect. Aulomyrcia (Myrtaceae) is described and illustrated. Myrcia bahiensis Gaem & Mazine can be distinguished from all its congeners by large leaf blades bearing longitudinal, curved marks that indicate a plicate ptyxis, in combination with glabrous inflorescences, inconspicuous bracts, large flower buds, and a ‘hyper-hypanthium’ floral developmental pathway. Within the Marlierea group, vegetative morphological traits of Myrcia bahiensis most resemble those of Myrcia sucrei, whereas its reproductive organ morphology recalls M. neoregeliana. However, M. sucrei has densely tomentose inflorescences and showy bracts while M. neoregeliana has smaller leaves without longitudinal marks, indicating a planate ptyxis. Myrcia bahiensis is known from only one collection made in the cacao region of southern Bahia, Brazil. Due to a lack of reliable geographical distribution information, the new taxon is provisionally assessed as Data Deficient according to the IUCN criteria. An identification key for all species of the Marlierea group occurring in the Atlantic Forest of Bahia state is provided.

Infraspecific names and combinations are provided for 19 variants of Elaeocarpus L. in the Flora Malesiana region.

A revision of Clinopodium L. s.l., including species of Acinos Mill., Calamintha Mill. and Micromeria Benth. sect. Pseudomelissa Benth. which occur Iraq, recognises five species, one of which, C. dokanicum Dirmenci, is newly described and endemic to northern Iraq. An identification key and distribution map are provided, as well as updated nomenclature, descriptions, conservation assessments and taxonomic notes for each species; taking into account recent changes to the circumscription of Clinopodium.

Summary

Telipogon leisberthvelezii Iturralde, M.M.Jiménez & H.Garzón, a new species of orchid, discovered in the Cordillera del Cóndor in southern Ecuador, is described and illustrated and its morphological similarities to other species are discussed. The new species is morphologically most similar to T. jostii (Dodson) N.H.Williams & Dressler but differs in the ellipsoid-obovoid petals with a bilobed base, the lip having a deltoid midlobe and dolabriform lateral lobes and a lower density of setae on the column. It is currently known from a single locality only, occurring as an epiphyte in lower montane forest.

Systematic monographs are an important tool for understanding biodiversity. However, while papers that outline systematic methods for biogeography, phylogenetics and diversification are commonplace, papers that cover methods for monographic and taxonomic research are rare. In this paper, we describe how we conducted a monographic study of Ipomoea, drawing attention to the resources we made use of and the practical steps we took, with a particular focus on how we integrated results from molecular and morphological analyses. The monograph provided a framework for a range of subsequent research, including studies on the origin of the important crop sweet potato. It is hoped that our experience will provide a blueprint for others embarking on the preparation of a systematic monograph.

Fieldwork, examination of herbarium specimens and photographic images, supported by molecular sequencing have resulted in the re-interpretation of a number of species of Ipomoea L. found in Ecuador and the recognition of four new species. Ipomoea ophiodes Standl. & Steyerm. is shown to be a distinct species from I. regnellii Meisn. and their contrasting distribution is mapped. An unusual variation in I. setosa Ker Gawl. is discussed and illustrated. It is shown that, whereas I. velardei O'Donell is present in the south of Ecuador, records of I. jujuyensis O'Donell are probably all errors for I. quitensis J.R.I.Wood & Cerón, which is described as a new species endemic to Ecuador. Three other endemic species all known from single locations, I. ceronii J.R.I.Wood & P.Muñoz, I. condorensis J.R.I.Wood & Scotland and I. papyrifera J.R.I.Wood & Scotland are described as new. The full distribution of I. aequatoriensis T.Wells & P.Muñoz is mapped as a result of recent fieldwork and I. amazonica (D.F.Austin & Staples) J.R.I.Wood & Scotland is recorded from Ecuador for the first time. Taxonomic notes, information on habitat and distribution, maps, line drawings and photographs illustrate the species discussed. A key to all 57 species of Ipomoea recorded from Ecuador is provided to facilitate identification.

The little-known and infrequently collected papilionoid legume genus Weberbauerella, is only known from outlying regions of the Atacama Desert. Presently it comprises three species, one in Chile and two in Peru. These small, woody, perennial species, enigmatic in both occurrence and form, are found growing in isolated populations in climatically extreme conditions. They are characterised by the presence of pustular glands throughout. Here we revise the genus, providing a key to the species, descriptions, distribution maps, illustrations, assessments of conservation status and notes on a northern variant population.

Ninety-two New Guinea Cyrtandra J.R.Forst. & G.Forst. names, nine Cyrtandropsis Lauterb. names and one species of Sepikea Schltr. are recognised here, presented in alphabetical order with notes on typification based on the literature and preliminary herbarium observations. A new name, Cyrtandra schlechteri, is proposed for the illegitimate name C. glabrata Schltr. Lectotypes are selected for 66 Cyrtandra names and nine Cyrtandropsis names; neotypes are designated for four Cyrtandra names. Seventeen Cyrtandra names and eight Cyrtandropsis names are considered incertae sedis due to missing type material.