scholarly journals Three new species of Tricalysia (Rubiaceae) from Atlantic Central Africa

2020 ◽  
Vol 153 (2) ◽  
pp. 257-266
Author(s):  
Olivier Lachenaud ◽  
Tariq Stévart ◽  
Bonaventure Sonké
Keyword(s):  
New Species ◽  
Conservation Status ◽  
Central Africa ◽  
Iucn Red List ◽  
Equatorial Guinea ◽  
Strict Sense ◽  
Tropical Africa ◽  
Three New Species ◽  
Herbarium Collections ◽  
Near Threatened

Background and aims – The genus Tricalysia A.Rich. (Rubiaceae), regarded here in the strict sense (i.e., excluding Empogona Hook.f.), includes 77 species in tropical Africa, Madagascar and the Comoros. In the current paper, three new species from Atlantic Central Africa are described and illustrated; their conservation status is also assessed.Material and methods – This paper is based on a study of herbarium collections from BR, BRLU, K, LBV, P, WAG and YA. Normal practices of herbarium taxonomy have been applied. The conservation status assessments follow the IUCN Red List criteria.Results – Tricalysia lophocarpa O.Lachenaud & Sonké is endemic to Gabon and is best recognised by its fruits with 8–10 narrow longitudinal ribs. Tricalysia obovata O.Lachenaud & Sonké is endemic to Equatorial Guinea (Rio Muni) and may be recognised by its obovate leaves with rounded base, glabrous stems, and sessile flowers with included style and half-exserted anthers. Tricalysia wilksii O.Lachenaud & Sonké occurs in Gabon and southwestern Republic of Congo, and may be recognised by its glabrous stems and leaves, the latter with crypt domatia, its linear calyx teeth equalling or exceeding the tube in length, and its shortly pedicellate fruits. The three species are assessed respectively as Near-threatened (T. lophocarpa), Critically Endangered (T. obovata) and Vulnerable (T. wilksii).

 A new genus of angraecoid orchids (Orchidaceae: Angraecinae) with highly distinctive pollinaria morphology, including three new species from tropical West and Central Africa

Phytotaxa ◽  
2018 ◽  
Vol 373 (2) ◽  
pp. 99
Author(s):  
PASCAL DESCOURVIÈRES ◽  
JOÃO N. M. FARMINHÃO ◽  
VINCENT DROISSART ◽  
JEAN-YVES DUBUISSON ◽  
MURIELLE SIMO-DROISSART ◽  
...  
Keyword(s):  
New Species ◽  
New Genus ◽  
Conservation Status ◽  
Central Africa ◽  
Iucn Red List ◽  
Valid Species ◽  
Preliminary Assessment ◽  
West And Central Africa ◽  
Three New Species ◽  
Angraecoid Orchids

A recent large phylogenetic tree for the angraecoid orchids has shown that the Afrotropical genus Diaphananthe is polyphyletic with a small group of four species sister to Aerangis and Eurychone. These species have diagnostic morphological features different from any other angraecoids, notably an erose to fringed surface of the stipes and a calceiform viscidium. Diaphananthe quintasii, which has been regarded as conspecific with D. rohrii, is reinstated as a valid species and lectotypified, and Diaphananthe alfredii and Rhipidoglossum magnicalcar are put in synonymy under D. quintasii. To accommodate this group of species, along with three new taxa from West and Central Africa, a new genus named Kylicanthe is here described. Four new combinations are thus proposed, and K. bueae is chosen as the type species of the new genus and neotypified. Additionally, K. arcuata, K. cornuata, and K. perezverae are described as new species. An identification key for Kylicanthe and allied genera is presented, as well as one for the seven species in the genus. Notes on ecology and distribution in addition to a preliminary assessment of conservation status following the IUCN Red List are also provided.

Studies in Neotropical Araliaceae. IV. Three New Species of Sciodaphyllum from the Eastern Andes of Central Peru

2020 ◽  
Vol 28 (2) ◽  
pp. 75-84
Author(s):  
M. Marcela Mora ◽  
Porter P. Lowry II ◽  
Gregory M. Plunkett
Keyword(s):  
New Species ◽  
Conservation Status ◽  
Iucn Red List ◽  
Red List ◽  
Neotropical Species ◽  
Iucn Red List Categories ◽  
The Andes ◽  
Red List Categories ◽  
Three New Species ◽  
Near Threatened

Sciodaphyllum P. Browne (Araliaceae) has recently been resurrected to accommodate the majority of Neotropical species previously included in Schefflera J. R. Forst. & G. Forst. Recent field and herbarium studies have revealed many distinctive new species of Sciodaphyllum, including three from the eastern slopes of the Andes in central Peru, which are described and illustrated here: S. geniculatum M. M. Mora, Lowry & G. M. Plunkett, S. oxapampense G. M. Plunkett, Lowry & M. M. Mora, and S. rodolfoi Lowry, G. M. Plunkett & M. M. Mora. The conservation status of S. geniculatum is assessed as Vulnerable (VU) using the IUCN Red List categories and criteria, whereas both S. oxapampense and S. rodolfoi are assessed as Near Threatened (NT).

Taxonomy of Atlantic Central African orchids 4. A new species of Tridactyle (Vandeae, Epidendroideae, Orchidaceae) from Gabon and Equatorial Guinea

Phytotaxa ◽  
2015 ◽  
Vol 212 (2) ◽  
pp. 141 ◽  
Author(s):  
Tania D'haijère ◽  
Sophie Leguil ◽  
Pierre Meerts ◽  
Tariq Stévart
Keyword(s):  
New Species ◽  
Conservation Status ◽  
Leaf Shape ◽  
Central Africa ◽  
Iucn Red List ◽  
Red List ◽  
Equatorial Guinea ◽  
Preliminary Assessment ◽  
Iucn Red List Categories ◽  
A New Species

Nine plants specimens of an apparently new Tridactyle species were collected in Gabon and Equatorial Guinea. They have an erect habit and a particular leaf shape which makes the species unique in the genus. The flowers and inflorescences share the general morphology of Tridactyle tridactylites, one of the most frequently collected species of Tridactyle in Central Africa. Four other Tridactyle taxa possess a 3 to 6 cm long inflorescence and a labellum with entire side lobes, and one species, Tridactyle stevartiana, has leaves of similar width and length. We here show that these new 9 specimens represent a new species, described as Tridactyle minutifolia. The diagnostic traits include linear thin leaves, and erect habit. Interestingly, many specimens of Tridactyle minutifolia lack spur; this phenomenon is sometimes found in orchids growing in an environment where their pollinators are absent. A table of the diagnostic characters of the six Continental African Tridactyle taxa considered here is included. A preliminary assessment of the conservation status of T. minutifolia, using the IUCN Red List Categories and Criteria is provided.

Wrongly identified material of Davilla macrocarpa (Dilleniaceae) represents two new species from Brazil

2018 ◽  
Vol 151 (3) ◽  
pp. 423-433
Author(s):  
Claudio Nicoletti de Fraga ◽  
João Renato Stehmann
Keyword(s):  
New Species ◽  
Conservation Status ◽  
Iucn Red List ◽  
Red List ◽  
Morphological Data ◽  
Herbarium Specimens ◽  
Endangered Plant ◽  
Fresh Material ◽  
Herbarium Collections ◽  
Near Threatened

Background – Davilla Vand. is a monophyletic genus and member, with other genera endemic to the Neotropics, of the Doliocarpoid clade, a natural lineage of the subfamily Doliocarpoideae J.W.Horn. Its sepals, unequal in size, with two inner ones large and crustaceous and completely covering the fruit, represent a morphological synapomorphy for the genus.Methods – Our fieldwork in remnants of the Atlantic forest in the states of Bahia and Espírito Santo, Brazil, led to the discovery of two new Davilla species. Herbarium collections were consulted for their determination and comparison with identified specimens. Morphological data were obtained through the study of herbarium specimens and of fresh material collected in the field. Key results – Davilla coriacea Fraga & Stehmann and D. undulata Fraga & Stehmann, are herein described and illustrated. Diagnostic characters and affinities of the new species are discussed, accompanied by notes on their ecology, geographic distribution and conservation status. A key to all species of Davilla sect. Homalochlaena is also provided. The new species are similar to D. sessilifolia Fraga and Davilla flexuosa A.St.-Hil. and have been identified in most herbaria as Davilla macrocarpa Eichler. In accordance with the criteria of the IUCN Red List of endangered plant species, D. coriacea and D. undulata are to be assessed as Endangered (EN) and Near Threatened (NT) respectively.

Taxonomy of Atlantic Central African orchids, 6: three new species of Angraecum sect. Afrangraecum (Orchidaceae, Angraecinae) from Gabon and São Tomé

Phytotaxa ◽  
2017 ◽  
Vol 323 (2) ◽  
pp. 143 ◽  
Author(s):  
VLADIMIR JEČMENICA ◽  
VINCENT DROISSART ◽  
ERIC AKOUANGOU ◽  
CHRISTELLE NYANGALA ◽  
BAKITA BAKITA ◽  
...  
Keyword(s):  
New Species ◽  
Conservation Status ◽  
Central Africa ◽  
Iucn Red List ◽  
Molecular Evidence ◽  
Preliminary Assessment ◽  
The Third ◽  
Iucn Red List Categories ◽  
Dichotomous Key ◽  
Three New Species

Three new species of Angraecum sect. Afrangraecum from Central Africa are here described and illustrated. They are morphologically similar to A. affine and A. cribbianum. Two of them, A. gereauanum and A. geerinckianum, are only known from Massif du Chaillu in Gabon and appear to be closely related based on morphological and preliminary molecular evidence. The third species, A. oliveirae, is endemic to São Tomé. A dichotomous key to all fourteen species of A. sect. Afrangraecum and a table with the distinguishing characters of the three new species and closely allied taxa are provided. A preliminary assessment of the conservation status of the new species is also presented, using the IUCN Red List categories and criteria.

Lurking in the Shadows: A New Species of Drypetes (Putranjivaceae) from Central Africa Hiding in Forest Plots and Herbaria

2021 ◽  
Vol 29 ◽  
pp. 14-23
Author(s):  
Alejandro Quintanar ◽  
Patricia Barberá ◽  
Diosdado Nguema ◽  
Vicent Medjibe ◽  
Zoë A. Goodwin ◽  
...  
Keyword(s):  
New Species ◽  
Democratic Republic ◽  
Conservation Status ◽  
Central Africa ◽  
Forest Tree ◽  
Wide Distribution ◽  
Morphological Description ◽  
Republic Of The Congo ◽  
Herbarium Collections ◽  
A New Species

Here we publish a new species of forest tree of the genus Drypetes Vahl (Putranjivaceae), D. umbricola D. J. Harris & Quintanar, which has a wide distribution in Central Africa (Cameroon, Central African Republic, Democratic Republic of the Congo, Gabon, and Republic of the Congo). It is known from 70 herbarium collections and additional sterile plot vouchers. A differential diagnosis, detailed morphological description, photographs, an illustration, and information about its habitat, distribution, and conservation status are provided.

Three new species of thelotremoid Graphidaceae from tropical Africa

Phytotaxa ◽  
2014 ◽  
Vol 189 (1) ◽  
pp. 176 ◽  
Author(s):  
Robert Lücking
Keyword(s):  
New Species ◽  
Tropical Africa ◽  
Novel Taxa ◽  
Three New Species ◽  
Herbarium Collections

Three new species of thelotremoid Graphidaceae are described from tropical Africa. Astrochapsa fusca Lücking differs from A. platycarpella in the brown thallus and larger ascospores with more numerous septa. Ocellularia abbayesiana is similar to O. exuta in morphology and chemistry but has smaller, hyaline ascospores. Ocellularia grantii resembles O. terebrata in the carbonized excipulum and columella, the hyaline, transversely septate ascospores, and the psoromic acid chemistry, but is distinguished by its verrucose-bullate thallus, white-tipped columella, and smaller ascospores. The three species were discovered in historic material collected between 1874 and 1954 and underline the importance of revising herbarium collections for the discovery of novel taxa.

Taxonomy of Atlantic Central African orchids 3. A new species of Bulbophyllum Thouars (Orchidaceae) from the Monts de Cristal, Gabon

Phytotaxa ◽  
2014 ◽  
Vol 177 (1) ◽  
pp. 26 ◽  
Author(s):  
Tariq Stévart ◽  
Jean Philippe Biteau ◽  
Valérie Cawoy ◽  
Vincent Droissart
Keyword(s):  
New Species ◽  
Conservation Status ◽  
Leaf Shape ◽  
Central Africa ◽  
Iucn Red List ◽  
Preliminary Assessment ◽  
Iucn Red List Categories ◽  
Lowland Forests ◽  
Distinguishing Features ◽  
A New Species

Two specimens of an apparently new Bulbophylum species were found in the Monts de Cristal, Gabon. They have a unique leaf shape among the species of this genus in Continental Africa. The flower shares the general morphology of Bulbophyllum saltatorium, one of the most common members of Bulbophyllum in Central Africa. Eight other taxa of the Continental African Bulbophyllum possess unifoliate pseudobulbs and long hairs on the lip. Comparison with them indicates that the new collections from Gabon represent a distinctive species, not yet known in the genus. We describe it here as Bulbophyllum pauwelsianum. The distinguishing features of the species include its leaves, which are pendant, coriaceous, linear, semiterete and v-shaped in transverse section, and its sepals, which possess relatively long hairs on their margins. A table of the taxonomic treatments of the nine Continental African Bulbophyllum taxa considered here is included. A taxonomic key and a table of the diagnostic characters of these nine taxa are given to facilitate identification. The new species is restricted to lowland forests of the Monts de Cristal in Gabon. A preliminary assessment of the conservation status, using the IUCN Red List Categories and Criteria is provided.

Three new species of Graphidaceae from tropical Africa

Phytotaxa ◽  
2014 ◽  
Vol 189 (1) ◽  
pp. 325 ◽  
Author(s):  
DRIES VAN DEN BROECK ◽  
ROBERT LÜCKING ◽  
DAMIEN ERTZ
Keyword(s):  
New Species ◽  
Democratic Republic ◽  
Central Africa ◽  
Tropical Africa ◽  
Republic Of The Congo ◽  
Three New Species

Three new species of Graphidaceae are described as new to science from tropical Africa: Graphis aptrootiana Van den Broeck, Lücking & Ertz and Redingeria desseiniana Van den Broeck, Lücking & Ertz from the Democratic Republic of the Congo, and G. vandenboomiana Ertz, Lücking & Van den Broeck from Reunion. A key is presented to all known species of Redingeria. The lichenicolous fungus Etayoa trypethelii is mentioned as new to Central Africa.

A Neglected New Species of Hymenaea (Leguminosae, Detarioideae) fromthe Brazilian Amazon

2020 ◽  
Vol 45 (1) ◽  
pp. 85-90
Author(s):  
Rafael Barbosa Pinto ◽  
Marcos José da Silva ◽  
Ana Maria Goulart de Azevedo Tozzi ◽  
Vidal de Freitas Mansano
Keyword(s):  
New Species ◽  
Amazon Basin ◽  
Conservation Status ◽  
Field Studies ◽  
Brazilian Amazon ◽  
Iucn Red List ◽  
Amazon Rainforest ◽  
Herbarium Collections ◽  
Iucn Red List Criteria ◽  
A New Species

Abstract—A new species, Hymenaea jeaniana, is described and illustrated. The species is known from one of the best-sampled reserves of Amazon Rainforest, the Reserva Adolpho Ducke, in Manaus, and from protected areas of the municipality of Presidente Figueiredo, in Amazonas, Brazil. Previously, the species has been mistakenly assigned to the circumscription of the morphologically similar H. parvifolia, but differs in certain leaflet, inflorescence, and flower characteristics. The new species has a restricted distribution and is assessed as Endangered following IUCN Red List criteria. Based on herbarium collections and field studies, we present a full species description, an illustration, conservation status, and taxonomic comments. An identification key to the Hymenaea species of Brazil is also provided. There are six species of Hymenaea in the Amazon Basin, including the species described herein.

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