01775nas a2200217 4500008004100000245004200041210004000083260001600123300001100139490000800150520118400158653001301342653001701355653001701372653001401389653002401403100001701427700001501444700001601459856008201475 2019 eng d00aA checklist of rheophytes of Cameroon0 achecklist of rheophytes of Cameroon c09 May 2019 a81-1310 v1213 a

Rivers in Cameroon were surveyed to collect and document rheophytic plants. Rheophytes are the dominant aquatic macrophytes in tropical river systems, where they are adapted to extreme environments of rushing water (e.g., river rapids, waterfalls and flash floods). Rheophytic plants are useful indicators of river health. However, their habitats are threatened by human activities such as agriculture, plantation development, alluvial mining and dam construction, particularly in tropical countries. In this survey we documented 66 rheophytic species in 29 genera and 16 families. Two ferns, 8 monocotyledons and 56 dicotyledons were listed. Apart from the Podostemaceae family in which all species are rheophytic, the other 15 families have few species which are rheophytic. Five of these families have up to four species and the remaining 10 have only one member as a rheophytic species. The conservation status of each species is assessed and discussed. This work urges botanists, conservationists, and policy makers to do more to protect the habitats of rheophytes and put in place strategies and action plans for the conservation of this important biological group

10aCameroon10aconservation10adistribution10ainventory10aRheophyte diversity1 aKuetegue, F.1 aSonké, B.1 aAmeka, G.K. uhttps://rubiaceae-africa.myspecies.info/content/checklist-rheophytes-cameroon01455nas a2200157 4500008004100000245012100041210006900162300001200231490000700243520084700250100001701097700001501114700001401129700001701143856013701160 2017 eng d00aCraterispermum capitatum and C. gabonicum (Rubiaceae): two new species from the Lower Guinean and Congolian Domains.0 aCraterispermum capitatum and C gabonicum Rubiaceae two new speci a103-1180 v833 a

Craterispermum capitatum and C. gabonicum, two new species of Rubiaceae, are described from the Lower
Guinea and Congolian Domains. Detailed descriptions and distribution maps are provided for each species,
their conservation status is assessed and their taxonomic affinities are discussed. Craterispermum
gabonicum is unique within the genus because of the strong dimorphism in brevistylous and longistylous
flowers and inflorescences. We hypothesize that this species shows some form of dioecy. The distribution
of C. capitatum shows a wide disjunction: the species is present in the Lower Guinean and Congolian
Domains but absent from Gabon and South Cameroon. An identification key for the Craterispermum
species present in the Lower Guinean and Congolian Domains is given.

1 aTaedoumg, H.1 aSonké, B.1 aHamon, P.1 aDe Block, P. uhttps://rubiaceae-africa.myspecies.info/content/craterispermum-capitatum-and-c-gabonicum-rubiaceae-two-new-species-lower-guinean-and02045nas a2200169 4500008004100000245007400041210006900115300001000184490000800194520144000202100002601642700002301668700002301691700002401714700002701738856011001765 2018 eng d00aTwo new species of Raphia (Palmae/Arecaceae) from Cameroon and Gabon0 aTwo new species of Raphia PalmaeArecaceae from Cameroon and Gabo a17-300 v1113 a

Raphia (Arecaceae, Calamoideae) is the most diverse genus of African palms with around 20 species.
Two new species from Cameroon and Gabon, Raphia gabonica Mogue, Sonké & Couvreur, sp. nov. and
Raphia zamiana Mogue, Sonké & Couvreur, sp. nov. are described and illustrated. Their affinities are
discussed and the conservation status of each species is assessed. For both species, distribution maps are
provided. Raphia gabonica is restricted to two small populations from central Gabon, where it occurs on
hillsides on tierra firme soil, and close to small streams. Its preliminary IUCN status is Endangered, being
amongst the five most threatened palm species in Africa. Raphia gabonica potentially belongs to the moniliform
section. Raphia zamiana is largely distributed from south Cameroon to south Gabon and is very
common. It is also a multi-used palm, from which wine, grubs and construction material are extracted and
sold. It generally occurs in large stands in a wide range of ecosystems such as swamps, coastal forests on
partially inundated sandy soils and inundated savannahs. Its large stature, hard to access habitat (swamps)
and abundant presence might have discouraged botanists to collect it until now. Raphia zamiana belongs
to the taxonomically complex raphiate section.

1 aKamga, Suzanne, Mogue1 aNiangadouma, Raoul1 aStauffer, Fred, W.1 aSonké, Bonaventure1 aCouvreur, Thomas, L.P. uhttps://rubiaceae-africa.myspecies.info/content/two-new-species-raphia-palmaearecaceae-cameroon-and-gabon