A New Species of Rhaptopetalum (Scytopetalaceae) from Western Cameroon

Cheek, Martin; Gosline, George; Csiba, Laszlo

doi:10.2307/4110996

Cited by 9 publications

(3 citation statements)

References 4 publications

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“…( Cheek & Fischer, 1999 ), Impatiens frithii Cheek ( Cheek & Csiba, 2002b ), Isoglossa dispersa I. Darbysh. ( Darbyshire, Pearce & Banks, 2011 ), Kupea martinetugei Cheek & S.A.Williams ( Cheek, Williams & Etuge, 2003 ), Ledermanniella onanae Cheek ( Cheek, 2003 ), Ledermanniella pollardiana Cheek & Ameka ( Cheek & Ameka, 2008 ), Memecylon kupeanum R.D.Stone, Ghogue & Cheek ( Stone, Ghogue & Cheek, 2008 ), Mussaenda epiphytica Cheek ( Cheek, 2009 ), Newtonia duncanthomasii Mackinder & Cheek ( Mackinder & Cheek, 2003 ), Oxyanthus okuensis Cheek & Sonké ( Cheek & Sonké, 2000 ) , Psychotria darwiniana Cheek ( Cheek, Corcoran & Horwath, 2009 ), Psychotria geophylax Cheek & Sonké and P. bakossiensis Cheek & Sonké (2005) , Psychotria kupensis Cheek ( Cheek, Horwath & Haynes, 2008 ), Psychotria moseskemei Cheek ( Cheek & Csiba, 2002a ), Rhaptopetalum geophylax Cheek & Gosline ( Cheek, Gosline & Csiba, 2002 ) and Ternstroemia cameroonensis Cheek ( Cheek, Tchiengue & Tacham, 2017 ).…”

Section: Discussionmentioning

confidence: 99%

Microcos magnifica (Sparrmanniaceae) a new species of cloudforest tree from Cameroon

Cheek

2017

PeerJ

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BackgroundAlthough many new species to science have been discovered from thousands of specimens resulting from botanical inventories to support conservation management in Cameroon in recent years, additional species remain to be formally evaluated taxonomically and described. These include species from genera which have been taxonomically neglected for many decades in Africa, such as Microcos.MethodsThis study is based mainly on herbarium specimens and field observations made in Cameroon during a series of botanical surveys. Herbarium material was examined with a Leica Wild M8 dissecting binocular microscope fitted with an eyepiece graticule.Principal Findings Microcos magnifica Cheek (Malvaceae-Grewioideae or Sparrmanniaceae) is described as an Endangered (EN B2 ab(iii)) new tree species from the submontane forests of Cameroon. It is illustrated and described, and its conservation status and taxonomic affinities are assessed. It is the first new Microcos described from Africa in more than 90 years and is unique on the continent in having sculptured fruits.DiscussionA systematic revision, with a molecular phylogenetic study, of Microcos Burm. ex L. in Africa is necessary if the affinities of the species, including M. magnifica, are to be reliably established.

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Section: Discussionmentioning

confidence: 99%

Microcos magnifica (Sparrmanniaceae) a new species of cloudforest tree from Cameroon

Cheek

2017

PeerJ

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“…(1999), Impatiens frithii Cheek (Cheek & Csiba 2002b), Isoglossa dispersa I.Darbysh. (Darbyshire et al 2011), Kupea martinetugei Cheek & S.A.Williams , Ledermanniella onanae Cheek (2003), Ledermanniella pollardiana Cheek & Ameka (2008), Mussaenda epiphytica Cheek (2009), Myosotis cameroonensis Cheek & R.Becker (2004), Newtonia duncanthomasii Mackinder & Cheek (2003), Oxyanthus okuensis Cheek & Sonké (2000), Psychotria geophylax and P. bakossiensis (Cheek & Sonké 2005), Psychotria moseskemei Cheek (Cheek & Csiba 2002a), Rhaptopetalum geophylax Cheek & Gosline (in Cheek et al 2002) and Talbotiella bakossiensis Cheek (Mackinder et al 2010). Most of these are endemics of single mountains, sometimes of neighbouring peaks, and have putative sister species from lowland forest elsewhere within Cameroon or in central Africa.…”

Section: New Species From the Highlands Of Cameroonmentioning

confidence: 99%

Ternstroemia cameroonensis (Ternstroemiaceae), a new medicinally important species of montane tree, nearly extinct in the Highlands of Cameroon

Cheek¹,

Tchiengué²,

Tacham³

2017

blum - j plant tax and plant geog

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Ternstroemia cameroonensis sp. nov. (Ternstroemiaceae) is formally described from the Highlands of Cameroon and its conservation status is assessed as Critically Endangered using the IUCN 2012 standard. This is the third species of Ternstroemia known from Africa. The species is unusual in its genus in being monoecious, having Terminalia-branching (Aubreville's model), phyllotaxy of 1/3 (not pseudo-verticillate), flowers with a uniseriate androecium and a distinct intra-staminal disc, and in the stamens lacking a distinct apicular connective. The species is used locally for extensive medicinal purposes. Published on 23 March 201754 Blumea -Volume 62 / 1, 2017 africana Melch. is known from the littoral from north of the Congo River to the Niger, and T. polypetala from the Uluguru Mts of Tanzania to northern Malawi (White et al. 2001). The genus was formerly included in Theaceae together with Ficalhoa Hiern (now usually placed in Sladeniaceae), e.g., in Verdcourt (1962). Ternstroemia is now placed in Ternstroemiaceae (Ericales) together with Balthasaria Verdc. (also Tropical Africa) and in Macaronesia Visnea L.f. (Weitzman et al. 2004). The remaining nine genera of Ternstroemiaceae occur mainly in Tropical Asia, but with two genera restricted to the Neotropics (Weitzman et al. 2004). By some Ternstroemiaceae is merged with Pentaphylacaceae where the latter unfortunately takes preference (nom. cons.) (Stevens 2001 onwards, Culham 2007. However, the sister relationship of Ternstroemiaceae and Pentaphylacaceae and hence the possibility to merge them is quite uncertain (Stevens pers. comm.). MATERIALS & METHODSAll specimens cited have been seen by the authors unless indicated n.v. Herbarium citations follow Index Herbariorum (Thiers et al. continuously updated) and binomial authorities IPNI (continuously updated). The conservation assessment was made using the categories and criteria of IUCN (2012). Herbarium material was examined with a Leica Wild M8 dissecting binocular microscope fitted with an eyepiece graticule measuring in units of 0.025 mm at maximum magnification. The drawing was made with the same equipment using Leica 308700 camera lucida attachment. Monoecious tree 10 -15 m tall (Letouzey 13380), glabrous. Crown hemispherical, trunk up to 40 cm diam at 1.5 m from the ground, rough, red-brown, with raised pustules; slash thick, white-cream, oxidising red-brown or pink. Branches and branchlets curving upwards and terminating in clusters of leaves, developing according to Aubréville's crown model (Tomlinson 1987), that is with 'Terminalia-branching'; leafy branchlets terete, 2-3.5 mm diam, drying dull grey-brown and cracking in oblongs, often covered by crustose lichens; leafscars horseshoe-shaped, pale glossy brown, slightly raised, c. 1 by 1 mm. New shoots probably arising in wet season (JuneOctober), of two types: 1) extension shoots (mainly vegetative, arising laterally from below the established plagiotropic main axes and arching below and then overtopping them; and 2) main shoots, a continuati...

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“…Rhaptopetalum Oliv. is a genus of 12 species of trees, mostly confined in the Gulf of Guinea, with only one species occurring in west Africa (Cheek et al 2002;Prance and Jongkind 2015). The genus was first described in 1865 by the English botanist Daniel Oliver (1865), as a member of the family Scytopetalaceae.…”

Section: Introductionmentioning

confidence: 99%