J. C. Arends and F. M. Van-der-laan, Cytotaxonomy of the Vandeae. Lindleyana, vol.1, issue.1, pp.33-41, 1986.

S. Asaha and E. L. Deakin, Land-use change and its influence on rural livelihoods, food security and biodiversity conservation in the Southwest Region of Cameroon, Center for International Forestry Research (CIFOR), pp.54-90, 2016.

B. S. Carlsward, W. L. Stern, and B. Bytebier, Comparative vegetative anatomy and systematics of the angraecoids (Vandeae, Orchidaceae) with an emphasis on the leafless habit, Botanical Journal of the Linnean Society, vol.151, issue.2, pp.165-218, 2006.

M. W. Chase, K. M. Cameron, J. V. Freudenstein, A. M. Pridgeon, G. Salazar et al., An updated classification of Orchidaceae, Botanical Journal of the Linnean Society, vol.177, issue.2, pp.151-174, 2015.

M. Cheek, Three new species of Cola (Sterculiaceae) from western Cameroon, Kew Bulletin Additional Series, vol.57, issue.2, pp.403-415, 2002.

M. Cheek, Cola metallica. The IUCN Red List of Threatened Species, p.3, 2003.

P. J. Cribb and B. S. Carlsward, New combinations in Aerangis, Diaphananthe and Podangis (Orchidaceae, subtribe Angraecinae), Phytotaxa, vol.71, issue.1, pp.42-47, 2012.

G. Dauby, T. Stévart, V. Droissart, A. Cosiaux, V. Deblauwe et al., ConR: An R package to assist large-scale multispecies preliminary conservation assessments using distribution data, Ecology and Evolution, vol.7, issue.24, pp.11292-11303, 2017.
URL : https://hal.archives-ouvertes.fr/hal-02140914

, ESRI, 2016.

P. Gasson and P. J. Cribb, The leaf anatomy of Ossiculum aurantiacum Cribb & van der Laan (Orchidaceae: Vandoideae), Kew Bulletin, vol.41, issue.4, pp.827-832, 1986.

R. Govaerts, P. Bernet, K. Kratochvil, G. Gerlach, G. Carr et al., , 2017.

. Iucn, IUCN Red List Categories and Criteria: Version 3.1. 2nd edition. Gland, Switzerland and, vol.32, p.pp, 2012.

. Iucn, Guidelines for Using the IUCN Red List Categories and Criteria, 2017.

. Iucn and . East, African Plants Red List Authority (2013) Afrothismia winkleri. The IUCN Red List of Threatened Species, p.23, 2013.

F. Martos, L. Pechon, T. Johnson, S. D. Bytebier, and B. , A reassessment of Angraecopsis, Mystacidium and Sphyrarhynchus (Orchidaceae, Vandeae) based on molecular and morphological evidence, Botanical Journal of the Linnean Society, vol.186, issue.1, pp.1-17, 2017.

B. J. Pollard, Red Data Book of the Flowering Plants of Cameroon: IUCN Global Assessments, Royal Botanic Gardens, pp.383-421, 2011.

B. J. Pollard and I. Darbyshire, Ossiculum aurantiacum, p.23, 2004.

L. Riley and W. Riley, Nature's strongholds: The world's great wildlife reserves, 2005.

F. Ronquist and J. P. Huelsenbeck, MrBayes 3: Bayesian phylogenetic inference under mixed models, Bioinformatics, vol.19, issue.12, pp.1572-1574, 2003.

F. Ronquist, M. Teslenko, P. Van-der-mark, D. L. Ayres, A. Darling et al., MrBayes 3.2: Efficient Bayesian phylogenetic inference and model choice across a large model space, Systematic Biology, vol.61, issue.3, pp.539-542, 2012.

M. Simo-droissart, G. M. Plunkett, V. Droissart, M. B. Edwards, J. Farminhão et al., New phylogenetic insights toward developing a natural generic classification of African angraecoid orchids (Vandeae, Orchidaceae), Molecular Phylogenetics and Evolution, vol.126, pp.241-249, 2018.
URL : https://hal.archives-ouvertes.fr/hal-02186923

M. Simo-droissart, B. Sonké, V. Droissart, and T. Stévart, Afropectinariella (Vandeae, Orchidaceae), a new genus from the Angraecum alliance, PhytoKeys, vol.96, pp.79-86, 2018.

B. Sonké, M. Cheek, D. M. Nambou, and E. Robbrecht, A new species of Tricalysia A. Rich. ex DC. (Rubiaceae) from western Cameroon, Kew Bulletin, vol.57, issue.3, pp.681-686, 2002.

B. Sonké, M. Cheek, M. Nambou, and E. Robbrecht, Tricalysia lejolyana. The IUCN Red List of Threatened Species, p.23, 2004.

D. L. Swofford, PAUP* 4.0: phylogenetic analysis using parsimony (* and other methods), 2002.

B. Thiers, Index Herbariorum: A global directory of public herbaria and associated staff, der Laan FM, vol.41, pp.823-826, 1986.