Taxonomic description and pollination ecology of Cyrtorchis okuensis (Orchidaceae, Angraecinae), a new species endemic to the Cameroon Volcanic Line

Background and aims – A recent taxonomic and molecular study of the genus Cyrtorchis revealed three new species. Here, we describe one of these new species, endemic to the Cameroon Volcanic Line (CVL), and compare it to its closest relatives. Its conservation status is provided along with detailed information on its ecology and reproductive biology.Material and methods – A detailed examination of 21 herbarium specimens was performed using standard practices of herbarium taxonomy. The conservation status of the new species was assessed using the IUCN Red List Categories and Criteria. Furthermore, we investigated the reproductive biology of the new species in an easily accessible subpopulation in Cameroon and tested the hypothesis of hawkmoth pollination in the genus Cyrtorchis. Key results – The newly discovered species, here named C. okuensis, is restricted to the montane forest (1600 to 2500 m elevation) of the CVL and is currently assessed as Near Threatened (NT). Among angraecoid orchids in which hawkmoth pollination is recorded (~16 species), C. okuensis has the shortest nectar spur (19–40 mm). In situ observations revealed hawkmoths with short proboscis of the genus Hippotion (H. celerio, H. eson, and H. osiris) as the main pollinators. The rate of pollination and fruiting under natural conditions was low and among the 448 surveyed flowers only 38.8% (174/448 flowers) had their pollinia removed, 19% produced fruits (87/448 flowers), and 16% (70/448 flowers) set mature fruits. Conclusion – Cyrtorchis okuensis is clearly differentiated from C. submontana by its longer and wider floral bracts, longer anther caps, and wider triangular dorsal sepal.

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Synoptic revision of the genus Cyrtorchis Schltr. (Angraecinae, Orchidaceae) in Central Africa, with the description of a new species restricted to submontane vegetation

Phytotaxa ◽

10.11646/phytotaxa.267.3.1 ◽

2016 ◽

Vol 267 (3) ◽

pp. 165

Author(s):

LAURA AZANDI ◽

TARIQ STEVART ◽

BONAVENTURE SONKÉ ◽

MURIELLE SIMO-DROISSART ◽

MARIE-LOUISE AVANA ◽

...

Keyword(s):

New Species ◽

New Records ◽

Central Africa ◽

Taxonomic Revision ◽

Detailed Examination ◽

Iucn Red List ◽

Herbarium Specimens ◽

Iucn Red List Categories ◽

One New Species ◽

A New Species

As a preliminary step to the taxonomic revision of the genus Cyrtorchis, a synoptic revision of the species occurring in Central Africa was undertaken. Based on a detailed examination of 1,039 herbarium specimens, including nomenclatural types, we have recognized 14 species in Central Africa (one of which is divided into two subspecies), including one new species that the study brought to light, described here as Cyrtorchis submontana. The new species closely resembles C. guillaumetii and C. brownii in general aspect, but differs from them in having thinner, small elliptic leaves and shorter, fewer-flowered, more lax inflorescences with shorter bracts. The species is restricted to submontane vegetation of Central Africa and is assessed as Endangered following the IUCN Red List Categories and Criteria. Cyrtorchis latibracteata and C. subcylindrifolia are lectotypified, and the latter is placed as a synonym under C. henriquesiana. Many new records are reported, and for each taxon the distribution, habitat and ecology are given. An identification key for the Central African taxa is also provided.

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A new species (Begonia giganticaulis) of Begoniaceae from southern Xizang (Tibet) of China

PhytoKeys ◽

10.3897/phytokeys.187.75854 ◽

2021 ◽

Vol 187 ◽

pp. 189-205

Author(s):

Dai-Ke Tian ◽

Wen-Guang Wang ◽

Li-Na Dong ◽

Yan Xiao ◽

Min-Min Zheng ◽

...

Keyword(s):

New Species ◽

Phylogenetic Analyses ◽

Conservation Status ◽

Female Flower ◽

Iucn Red List ◽

Red List ◽

Current Data ◽

Iucn Red List Categories ◽

Unique Shape ◽

A New Species

Begonia giganticaulis, a huge new species in Begonia sect. Platycentrum of Begoniaceae from southern Xizang (Tibet) of China, is described. Morphologically, it is mostly similar to B. longifolia and B. acetosella, but clearly differs from the former mainly by its dioecious and taller plants, sparse hairs on abaxial veins, longer inflorescence, unique shape of fruits, and differs from the latter mainly by its late and longer flowering time, 6-tepals of female flower and 3-loculed ovary. The phylogenetic analyses also support the separation of the new species from other taxa. Based on the current data, its conservation status is assigned to Endangered (B2a) according to the IUCN Red List Categories and Criteria.

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Anemopaegma kawense (Bignoniaceae), a new species from the Kaw Mountain (French Guiana), with notes on related species and a key to the genus in the Guianas

Plant Ecology and Evolution ◽

10.5091/plecevo.2021.1775 ◽

2021 ◽

Vol 154 (2) ◽

pp. 296-306

Author(s):

Olivier Lachenaud ◽

Fabiana Firetti ◽

Lúcia G. Lohmann

Keyword(s):

New Species ◽

French Guiana ◽

Conservation Status ◽

Iucn Red List ◽

Herbarium Specimens ◽

Similar Species ◽

Centre Of Diversity ◽

North Eastern ◽

The Guianas ◽

A New Species

Background and aims – The genus Anemopaegma (Bignoniaceae) includes around 47 species and has its centre of diversity in Brazil. Here, we describe and illustrate a new species from French Guiana, Anemopaegma kawense, and compare it to the two most similar species, A. foetidum and A. granvillei. We further assess the conservation status of all three species.Material and methods – Morphological descriptions are based on herbarium specimens deposited at BM, BR, CAY, INPA, K, MO, P, SPF, and U, and, in the case of the newly described species, also on field observations. The conservation status assessments follow the IUCN Red List criteria.Key results – Anemopaegma kawense differs from both A. foetidum and A. granvillei by its densely villose twigs, longitudinally plicate leaflets with secondary veins not or hardly prominent below, and tertiary veins impressed below. It is further separated from A. foetidum by the leaflets that are villose below and the calyx that is entirely pubescent outside. On the other hand, A. kawense differs from A. granvillei by the densely lepidote outer surface of the corolla, shorter petiolules, leaflets with midrib impressed above, shorter bracts and bracteoles, inflorescence peduncle exceeding the rachis, and pedicels densely puberulous, not lepidote or only sparsely so at the apex. This species is endemic to the Kaw Mountain in north-eastern French Guiana, where it grows in low stunted forest on laterite; it is assessed as Endangered according to the IUCN criteria. New descriptions are provided for A. granvillei, which is newly reported from Suriname, and for A. foetidum, which is newly reported from French Guiana; these two species are assessed as Endangered and Least Concern, respectively. Lectotypes are designated for A. maguirei, which is here synonymised with A. foetidum, and for A. umbellatum, another synonym of that species. A key to the 12 species of Anemopaegma occurring in the Guianas is presented.

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

Phytotaxa ◽

10.11646/phytotaxa.177.1.2 ◽

2014 ◽

Vol 177 (1) ◽

pp. 26 ◽

Cited By ~ 5

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.

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Spiradiclis karstana (Rubiaceae), a new species from Yunnan, China

PhytoKeys ◽

10.3897/phytokeys.117.28281 ◽

2019 ◽

Vol 117 ◽

pp. 1-8 ◽

Cited By ~ 1

Author(s):

Lei Wu ◽

Xiong Li ◽

Wen-Jian Liu ◽

Quan-Ru Liu

Keyword(s):

New Species ◽

Conservation Status ◽

Iucn Red List ◽

Red List ◽

Iucn Red List Categories ◽

Red List Categories ◽

First Time ◽

A New Species

Spiradicliskarstana, a new species of Spiradiclis (Rubiaceae) collected from Yunnan, China, is described for the first time. It is morphologically close to S.jingxiensis, but differs from the latter mainly by its inflorescences with 5–9 flowers, its 1.5–2.4 mm long peduncles, its stipules shorter than 1 mm and the 5–12 pairs of secondary veins. The conservation status is assessed as “Vulnerable” (VU) according to the IUCN Red List Categories and Criteria.

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

Novon A Journal for Botanical Nomenclature ◽

10.3417/2020410 ◽

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).

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Taxonomic Studies of Diospyros (Ebenaceae) from the Malagasy Region. VIII. New Species from the Littoral Forests of Eastern Madagascar

Novon A Journal for Botanical Nomenclature ◽

10.3417/2021678 ◽

2021 ◽

Vol 29 ◽

pp. 159-187

Author(s):

George E. Schatz ◽

Porter P. Lowry II ◽

Hasina N. Rakouth

Keyword(s):

New Species ◽

East Coast ◽

Conservation Status ◽

Iucn Red List ◽

Charcoal Production ◽

Forest Clearing ◽

Vernacular Names ◽

Iucn Red List Categories ◽

Littoral Forests ◽

Taxonomic Studies

Eleven new species of Diospyros L. (Ebenaceae) (D. falyi G. E. Schatz & Lowry, D. fasimainty G. E. Schatz & Lowry, D. littoralis Capuron ex G. E. Schatz & Lowry, D. mandenensis H. N. Rakouth, G. E. Schatz & Lowry, D. orbicularis G. E. Schatz & Lowry, D. pseudolanceolata G. E. Schatz & Lowry, D. rabehevitrae G. E. Schatz & Lowry, D. ramisonii G. E. Schatz & Lowry, D. ratovosonii H. N. Rakouth, G. E. Schatz & Lowry, D. retusa H. N. Rakouth, G. E. Schatz & Lowry, and D. tampolensis H. N. Rakouth, Lowry & G. E. Schatz), which are present in the littoral forests along the east coast of Madagascar, are described, along with notes on their distribution and vernacular names, and their conservation status according to the IUCN Red List Categories and Criteria. Given the diminished area of the Malagasy littoral forest ecosystem, and continuing threats from exploitation for firewood and charcoal production, forest clearing for agriculture, and mining, nine of the 11 new species are assessed as threatened: one Critically Endangered (D. tampolensis), three Endangered (D. falyi, D. rabehevitrae, and D. retusa), and five Vulnerable (D. fasimainty, D. orbicularis, D. pseudolanceolata, D. ramisonii, and D. ratovosonii), whereas two species are assessed as Near Threatened (D. littoralis and D. mandenensis).

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Valeriana caparaoensis (Valerianaceae nom. conserv.), a New Species from Southeastern Brazil

Systematic Botany ◽

10.1600/036364420x15801369352496 ◽

2020 ◽

Vol 45 (1) ◽

pp. 219-225

Author(s):

Cassio Rabuske-Silva ◽

Marcos Sobral ◽

João Ricardo Vieira Iganci

Keyword(s):

New Species ◽

Conservation Status ◽

Iucn Red List ◽

Red List ◽

Southeastern Brazil ◽

Southern Brazil ◽

Iucn Red List Categories ◽

Tropical Grasslands ◽

Red List Categories ◽

A New Species

Abstract—Valeriana caparaoensis, a new species from the High Altitude Tropical Grasslands of Southeastern Brazil, is described and illustrated. The new species is known only from the Serra do Caparaó massif, between the states of Minas Gerais and Espírito Santo, Southeastern Brazil. It shares morphological affinities with V. catharinensis and V. polystachya, the first restricted to Brazilian Subtropical Highland Grasslands, and the last restricted to Lowland Grasslands of Southern Brazil, Uruguay and Argentina. Besides the great geographical disjunction, the new species differs from the other two species by the pinnately lobed proximal leaves, by the lanceolate distal lobes and longer pseudopetioles in distal leaves, by differences in the size of the flowers, and by the rounded to ovate and broader achenes. Additionally, we provide the preliminary conservation status assessments using IUCN Red List categories and criteria, as well as an updated checklist and a key for Valeriana species from Southeastern Brazil.

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Allium shahinii: a new species of A. sect. Scorodon (Amaryllidaceae) from Turkey

Phytotaxa ◽

10.11646/phytotaxa.461.3.6 ◽

2020 ◽

Vol 461 (3) ◽

pp. 195-203

Author(s):

GÜLNUR EKŞİ ◽

HAYRİ DUMAN

Keyword(s):

New Species ◽

Conservation Status ◽

Iucn Red List ◽

Red List ◽

Distribution Map ◽

Mountain Ranges ◽

Iucn Red List Categories ◽

Deciduous Woodland ◽

Red List Categories ◽

A New Species

Allium shahinii, a new species of Allium sect. Scorodon, is described and illustrated from Erzincan Province, Eastern Turkey. It is a narrowly distributed geophyte growing on siliceous screes of warm exposure in mountain ranges of the nemoral and thermophilous deciduous woodland zone, showing close morphological relationships mainly with A. moschatum, A. stocksianum, A. spirophyllum, A. circumflexum but it is clearly differentiated due to perigon, outer tunic, indumentum, leaf and scape characteristics. In this study, diagnostic characters, description, taxonomic comments, photographs, distribution map, detailed illustration, the conservation status of A. shahinii and identification key are provided for A. shahinii and related taxa. According to IUCN Red List Categories and Criteria, A. shahinii is assessed here as a Critically Endangered (CR) species.

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Validation of the name Mitreola crystallina (Loganiaceae), a new species endemic to southwestern China

Phytotaxa ◽

10.11646/phytotaxa.471.2.4 ◽

2020 ◽

Vol 471 (2) ◽

pp. 139-144

Author(s):

JIAN-RONG YOU ◽

JUAN RAN ◽

CHENG LIU ◽

YU-MIN SHUI ◽

JIA-XIANG LI ◽

...

Keyword(s):

New Species ◽

Southwest China ◽

Conservation Status ◽

Corolla Tube ◽

Iucn Red List ◽

Red List ◽

Key To Species ◽

Iucn Red List Categories ◽

Data Deficient ◽

A New Species

Mitreola crystallina was proposed in 2006, but not valid. Here, we validate the name by giving a complete description, diagnosis, and illustration as a new species of Loganiaceae. Morphologically, it is most similar to M. pedicellata, but can be distinguished by its stems erect (vs. creeping), corolla lobes blue (vs. white), and stamens inserted at or near base of the corolla tube (vs. middle to nearly mouth of corolla tube). It is endemic to the shady cliffs of limestone forests of Malipo County, southwest China. The conservation status was assessed as data deficient (DD) according to the IUCN Red List categories and criteria. And a key to species of Mitreola in China is provided.

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