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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... -
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... -
Journal article
Pacific Species of Hibiscus sect. Lilibiscus (Malvaceae). 4. The Origin of Hibiscus Rosa-Sinensis: A 300-Year-Old Mystery Solved.
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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... -
Journal article
Cytotoxic ent-abietane diterpenoids, banyangmbolides A-E, from the leaves of Suregada occidentalis.
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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... -
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Journal article
Nepenthes barcelonae (Nepenthaceae), a new species from Luzon, Philippines.
Nepenthes barcelonae is described as a new species in sect. Insignes, where it is unique in the inset mouth and the dichromic upper pitchers (first-produced pitchers red, later-produced pitchers green) which are also dimorphic. This is a newly recorded phenomenon in the genus: the first produced (primary upper pitchers) are...Cheek, Martin ; Tandang, Danilo N. ; Pelser, Pieter B.
Luzon (Philippines), New species, Philippines, Nepenthes barcelonae, and Endangered species
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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... -
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Journal article
Undescribed 2-quinolines, onanaenine A and B, from Cameroonian Vepris onanae (Rutaceae).
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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...