Search Constraints
Search Results
-
2024
Journal article
Keita (Aptandraceae-Olacaceae s.l.), a new genus for African species previously ascribed to Anacolosa, including K. deniseae sp. nov., an Endangered submontane forest liana from Simandou, Republic of Guinea.
We show that the two continental African species previously ascribed to the genus , 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... -
2024
Journal article
Cytotoxic ent-abietane diterpenoids, banyangmbolides A-E, from the leaves of Suregada occidentalis.
-
2024
Journal article
The biocultural heritage and changing role of indigenous yams in the Republic of Guinea, West Africa.
La production mondiale d'igname est centrée sur l'Afrique de l'Ouest, mais il existe d'importantes lacunes dans les connaissances sur la diversité au niveau des exploitations agricoles dans une grande partie de la région, et particulièrement en Guinée. Bien que la production d'igname augmente en Guinée, à long terme, la... -
2024
Journal article
Keetia nodulosa sp. nov. (Rubiaceae - Vanguerieae) of West-Central Africa: bacterial leaf nodulation discovered in a fourth genus and tribe of Rubiaceae.
Keetia nodulosa Cheek, a cloud forest climber nearly endemic to Cameroon, with a single record from Nigeria, is described and illustrated. It is remarkable as the first known species to be recorded with bacterial leaf nodules (BLN) in the genus Keetia, and also, in the tribe Vanguerieae. Other genera in... -
2023
-
2023
Book chapter
Droseraceae.
Cheek, Martin
Droseraceae, Descriptors, Geographical distribution, and Identification
-
2023
Journal article
A Taxonomically-verified and Vouchered Checklist of the Vascular Plants of the Republic of Guinea.
The Checklist of the Vascular Plants of the Republic of Guinea (CVPRG) is a specimen-based, expert-validated knowledge product, which provides a concise synthesis and overview of current knowledge on 3901 vascular plant species documented from Guinea (Conakry), West Africa, including their accepted names and synonyms, as well as their distribution... -
2023
Journal article
A massive Critically Endangered cloud forest tree, Microcos rumpi (Grewiaceae) new to science from the Rumpi Hills, SW Region, Cameroon.
We describe (Grewiaceae) a massive new species to science from the Rumpi Hills of SW Region Cameroon, a proposed Tropical Important Plant Area. Confined on current evidence to submontane forest, the species is threatened by expanding habitat clearance for farms and is assessed as Critically Endangered. A large tree, attaining... -
2023
Journal article
Rinorea spongiocarpa and Rinorea dimakoensis (Violaceae), new threatened species of forest trees from East and South Regions of Cameroon and Gabon.
Two tree species are described as new to science: Achound. sp. nov. (placed in [unranked] Brachypetalae) and Achound. sp. nov. (placed in [unranked] Ilicifolieae). Both species occur in Cameroon, south of the Sanaga river, the first from South and East Regions, occurring in evergreen forest from Ngovayang and Lolodorf across...Achoundong, Gaston ; Cheek, Martin
Threatened plants, Gabon, Hydro-electric projects, Rinorea spongiocarpa, Vulnerable, Forest trees, New species, Rinorea dimakoensis, Cameroon, and Conservation
-
2023
Journal article
Phylogenomic analyses of Sapindales support new family relationships, rapid Mid-Cretaceous Hothouse diversification, and heterogeneous histories of gene duplication.
Sapindales is an angiosperm order of high economic and ecological value comprising nine families, c. 479 genera, and c. 6570 species. However, family and subfamily relationships in Sapindales remain unclear, making reconstruction of the order’s spatio-temporal and morphological evolution difficult. In this study, we used Angiosperms353 target capture data to... -
2023
Journal article
Barking up the wrong tree: the dangers of taxonomic misidentification in molecular phylogenetic studies.
– is a Brazilian endemic genus that has sat uncomfortably in Convolvulaceae where it was placed due to an enlarged and adnate fruit bract typical of . A recent molecular phylogeny suggested that two of its five morphologically almost identical species actually belong to two different families, Malpighiaceae (superrosids) and... -
2023
-
2023
Journal article
A taxonomic synopsis of unifoliolate continental African Vepris (Rutaceae).
Descriptions and illustrations are presented for three new species to science, Cheek Cheek (both Udzungwa Mts, Tanzania), and Q.Luke & Cheek (SE Kenyan kaya forests), in the context of a synoptic taxonomic revision and with an identification key to all the known unifoliolate taxa of in continental Africa. The new... -
2023
Journal article
Discovery and conservation of Monanthotaxis bali (Annonaceae) a new Critically Endangered (possibly extinct) montane forest treelet from Bali Ngemba, North West Region, Cameroon.
is the only known, solely montane (occurring solely above 2000 m alt.) species of the genus. It joins (Rwanda) and (Tanzania), two other species that can also occur above 2000 m alt. is an addition to the small number (28) of the tree species of the surviving montane forests of... -
2023
Journal article
Undescribed 2-quinolines, onanaenine A and B, from Cameroonian Vepris onanae (Rutaceae).
-
2023
Journal article
Afrothismiaceae (Dioscoreales), a new fully mycoheterotrophic family endemic to tropical Africa.
is a genus of non-photosynthetic mycoheterotrophs from the forests of continental tropical Africa. Multiple phylogenetic inferences using molecular data recover the genus as sister to a clade comprising mycoheterotrophic Thismiaceae and the photosynthetic family Taccaceae, contrary to earlier placements of and Thismiaceae within Burmanniaceae. Morphological support for separating from the... -
2023
Journal article
Pacific Species of Hibiscus sect. Lilibiscus (Malvaceae). 4. The Origin of Hibiscus Rosa-Sinensis: A 300-Year-Old Mystery Solved.
-
2022
Journal article
Lukea gen. nov. (Monodoreae-Annonaceae) with two new threatened species of shrub from the forests of the Udzungwas, Tanzania and Kaya Ribe, Kenya.
A new genus, Cheek & Gosline (Annonaceae) is erected for two new species to science, Cheek & Gosline from Kaya Ribe, SE Kenya, and Cheek & Gosline from the Udzungwa Mts, Tanzania. is characterised by a flattened circular bowl-shaped receptacle-calyx with a corolla of three free petals that give the... -
2022
Journal article
The ECAT dataset: expert-validated distribution data of endemic and sub-endemic trees of Central Africa (Dem. Rep. Congo, Rwanda, Burundi).
In this data paper, we present a specimen-based occurrence dataset compiled in the framework of the Conservation of Endemic Central African Trees (ECAT) project with the aim of producing global conservation assessments for the IUCN Red List. The project targets all tree species endemic or sub-endemic to the Central African... -
2022
Journal article
Sixty-seven species newly recorded for the flora of Angola: recent findings from vegetation surveys and herbarium collections.
Angola is a tropical country with many biogeographical units and, therefore, has a high floristic diversity. Although an increasing number of floristic studies has been carried out in Angola in recent years, the country is still considered to be underinvestigated as many species being collected were previously unknown there. Several... -
2022
Journal article
Taxonomic revision of Saxicolella (Podostemaceae), African waterfall plants highly threatened by Hydro-Electric projects.
Species of the genus Engl. (Podostemaceae) are African rheophytes, restricted to rapids and waterfalls as are all members of the family. Previously, was shown to be polyphyletic with two separate clades. The name Engl. was recently resurrected for one clade that is sister to the American genera (Tul.) Wedd., Michx.... -
2022
-
2022
Journal article
Chemistry, taxonomy and ecology of the potentially chimpanzee-dispersed Vepris teva sp.nov. (Rutaceae) endangered in coastal thicket in the Congo Republic.
Continuing a survey of the chemistry of species of the largely continental African genus , we investigate a species previously referred to as sp. 1 of Congo. From the leaves of sp. 1 we report six compounds. The compounds were three furoquinoline alkaloids, kokusaginine (1), maculine (2), and flindersiamine (3),... -
2022
Journal article
Genomic insights into rapid speciation within the world’s largest tree genus Syzygium.
Species radiations, despite immense phenotypic variation, can be difficult to resolve phylogenetically when genetic change poorly matches the rapidity of diversification. Genomic potential furnished by palaeopolyploidy, and relative roles for adaptation, random drift and hybridisation in the apportionment of genetic variation, remain poorly understood factors. Here, we study these aspects...Low, Yee Wen ; Rajaraman, Sitaram ; Tomlin, Crystal M. ; Ahmad, Joffre Ali ; Ardi, Wisnu H. …
Syzygium, Evolutionary genetics, Phylogenomics, Polyploidy in plants, and Comparative genomics
-
2022
Journal article
Piloting development of species conservation action plans in Guinea.
Conservation action plans need to be devised and implemented if we are to reduce the extinction risk faced by globally threatened plants. However, most plant species categorized as threatened globally on the IUCN Red List lack conservation action plans. In West Africa, Guinea is one of the most diverse countries... -
2022
Journal article
Impatiens banen and Impatiens etugei (Balsaminaceae), new threatened species from lowland of the Cross-Sanaga Interval, Cameroon.
We describe two range-restricted new species to science from the genus (Balsaminaceae), both threatened, from lowland of the Cross-Sanaga Interval of western Cameroon. The first, appears to be restricted to an open seepage microhabitat on granitic inselbergs in the lowland-submontane forest zone of the Ebo Forest in Littoral Region and... -
2021
Journal article
The endemic plant species of Mt Kupe, Cameroon with a new Critically Endangered cloud-forest tree species, Vepris zapfackii (Rutaceae).
We revise and update the records of strict and near-endemic species of Mt Kupe, Cameroon respectively from 31 strict endemics in 2004, to 25 today, and with near-endemic species 30, unchanged in number but with turnover. The changes result from new collections, discoveries and taxonomic changes in the last 16...Cheek, Martin ; Onana, Jean Michel
Mt Kupe (Cameroon), Vepris zapfackii, Perhumid, Threatened plants, Medicinal, and Submontane forest
-
2021
Journal article
Taxonomic revision of the threatened African genus Pseudohydrosme Engl. (Araceae), with P. ebo, a new, critically endangered species from Ebo, Cameroon
This is the first revision in more than 100 years of the African genus Pseudohydrosme, formerly considered endemic to Gabon. Closely related to Anchomanes, Pseudohydrosme is distinct from Anchomanes because of its 2-3-locular ovary (vs. unilocular), peduncle concealed by cataphylls at anthesis and far shorter than the spathe (vs. exposed,...Cheek, Martin ; Tchiengué, Barthélemy ; van der Burgt, Xander
-
2021
-
2021
Journal article
Genomic insights into rapid speciation within the world’s largest tree genus [PREPRINT].
Species radiations have long fascinated biologists, but the contribution of adaptation to observed diversity and speciation is still an open question. Here, we explore this question using the clove genus, Syzygium, the world’s largest genus of tree species comprising approximately 1200 species. We dissect Syzygium diversity through shotgun sequencing of...Low, Yee Wen ; Rajaraman, Sitaram ; Tomlin, Crystal ; Ahmad, Joffre Ali ; Ardi, Wisnu …
-
2020
Journal article
Three new Critically Endangered Inversodicraea (Podostemaceae) species from Tropical Africa: I. senei, I. tanzaniensis and I. botswana.
Cheek, Martin ; Séné , Olivier ; Ngansop , Eric
Waterfalls, Cameroon , Podostemaceae, Tropical Africa, Inversodicraea , Hydroelectric , Rheophytes , Botswana , Extinct , and Tanzania
-
2020
Journal article
New Guinea has the world’s richest island flora
New Guinea is the world’s largest tropical island and has fascinated naturalists for centuries. Home to some of the best-preserved ecosystems on the planet3 and to intact ecological gradients—from mangroves to tropical alpine grasslands—that are unmatched in the Asia-Pacific region4,5, it is a globally recognized centre of biological and cultural... -
2020
Journal article
Notes on the plants of Bakossi, Cameroon, and the new Cola etugei and Cola kodminensis (Sterculiaceae s. str.)
Background and aims – This paper reports a further discovery during preparation for a monograph of the genus Cola, and also in the context of a long-term botanical survey in the Cross River-Sanaga interval of west-central Africa, focussing on species discovery and conservation through the Tropical Important Plant Areas programme.Methods...Cheek, Martin ; Tchiengue, Barthelemy ; Baldwin, Isabel
-
2019
Journal article
Ternstroemia guineensis (Ternstroemiaceae), a new endangered cloudforest shrub with neotropical affinities from Kounounkan, Guinea, W. Africa.
-
2019
Journal article
A revision of the African genus Mesanthemum (Eriocaulaceae)
Mesanthemum is a genus comprising 16 species in the family Eriocaulaceae and is native to Africa and Madagascar. Eriocaulaceae are characterised by a basal tuft or rosette of narrow leaves and small flowers in heads. Mesanthemum can be recognised by diplostemonous flowers and fused glandular pistillate petals. While most Mesanthemum...Liang, Yuxi ; Phillips, Sylvia M. ; Cheek, Martin ; Larridon, Isabel
Africa, molecular phylogenetics, Madagascar, lectotypifications, new species, SEM seed images, and taxonomy