Kew Bulletin最新文献

Summary

Distributions reported for Poa chaixii in Plants of the World Online (2023) and Euro+Med Plantbase (https://europlusmed.org), based on Mouterde’s (1966a) cited collections, apply to P. moabitica. Poa chaixii does not occur in Syria, or anywhere else in the Levant. Poa moabitica is a very rare and distinctive species of sect. Homalopoa, known from only three collections. The Hayne type collection location, suggested to be Moab by Bor (1972), is here considered incorrect. Hayne’s Plants of the Holy Land specimens were collected from Jordan, Palestine, Lebanon and Syria in 1872. It is likely that P. moabitica, if it is still extant in nature (which is doubtful), only occurs locally in wet habitats of forested mountains of northwest Syria (Pabot collections), and northern Lebanon (type). The species might also be sought in the adjacent province of Hatay, Turkey. The species is Data Deficient but should probably be considered Endangered Globally and Locally.

Summary

We show that the two continental African species previously ascribed to the genus Anacolosa, differ in so many architectural, floral and vegetative characters from the remaining species of the genus (which occur from Madagascar to the western Pacific, including the type) that they clearly represent a separate genus. The African genus represented by these two species is unique within the Olacaceae s.l. (excluding Erythropalaceae) in being a climber (vs shrubs or trees in Anacolosa sensu stricto). Climbing in the two African species is achieved by perennial hook-like structures formed by a combination of five separate traits each of which is unknown elsewhere in the Olacaceae s.l. We formally delimit, describe and name this new African genus as Keita. Placement is tentatively in Aptandraceae but confirmation by molecular studies is required. We describe a new species from Guinea as Keita deniseae sp. nov. and transfer the Central African (Democratic Republic of Congo (DRC), Republic of Congo & Gabon) species from Anacolosa to the new genus as Keita uncifera comb. nov. Keita deniseae is assessed using the IUCN (2012) criteria as Endangered due to the threat of clearance or degradation of forest habitat for mining and agriculture, while K. uncifera is assessed as Least Concern in view of its large range, number of locations and low levels of threat. We review the discovery of Keita deniseae in the light of other recent discoveries of new taxa in both Simandou and the Republic of Guinea.

A new combination Gymnosporia listeri (Prain) A.T.Bhat, K.M.P.Kumar & Rana is proposed for the name Celastrus listeri Prain. Additionally, a suitable lectotype is designated for the name.

Summary

A new rank and combination, Berberis setifolia (Ahrendt) Bharali, B.Hajong & Harber is proposed for B. macrosepala var. setifolia Ahrendt, based on a morphological examination of herbarium specimens from Me La, NE Bhutan and Se La, Arunachal Pradesh, India and living plants from Se La. The treatment of B. macrosepala Hook.f. & Thomson by Ahrendt in his two monographic treatments of Berberis (i.e. Ahrendt 1941, 1961), is shown to not fully reflect the protologue, which describes the taxon as not just one-flowered, but also fascicled. Some specimens that Ahrendt cites, including those of the three varieties of B. macrosepala he proposed, are determined to belong to other species, some of which are unrecognised. Herbarium specimens of Ahrendt’s B. macrosepala var. setifolia from Bhutan are shown to be the same as those of a hitherto unidentified species from Arunachal Pradesh. A detailed taxonomic description, notes on habitat and ecology, and colour photographs are provided for B. setifolia.

A new species of Thonningia is described. T. alba is the third species to be recognised in the genus, and the fourth in the family Balanophoraceae from Madagascar. It is apparently endemic to rainforests of the west coast of the Masoala Peninsula. A description, detailed illustrations, taxonomic notes, an identification key to the genus Thonningia, a distribution map and a preliminary assessment of risk extinction for this new species are provided.

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.