We present an annotated checklist of the 14 species of Drypetes Vahl (Putranjivaceae) that occur in Liberia, as well as distribution maps of the country for each. Three species are new records for ...Liberia: D. floribunda (Müll. Arg.) Hutch., D. klainei Pierre ex Pax, and D. laciniata (Pax) Hutch. In addition, we describe a new species, D. liberica Quintanar & D. J. Harris, an understory shrub or small tree that is endemic to Liberia. Based on the specimens studied, we provide types for all names, including 14 newly selected lectotypes, in order to stabilize the nomenclature of the taxa involved. We also lectotypify one species, D. leonensis Pax, that for the moment we do not cite for Liberia, but the name has been the source of confusion with a species that does occur in the country.
Croton scarciesii (Euphorbiaceae-Crotonoideae), a rheophytic shrub from West Africa, is shown to have been misplaced in Croton for 120 years, having none of the diagnostic characters of that genus, ...but rather a set of characters present in no known genus of the family. Pollen analysis shows that the new genus Karima belongs to the inaperturate crotonoid group. Analysis of a concatenated molecular dataset combining trnL-F and rbcL sequences positioned Karima as sister to Neoholstia from south eastern tropical Africa in a well-supported clade comprised of genera of subtribes Grosserineae and Neoboutonieae of the inaperturate crotonoid genera. Several morphological characters support the relationship of Karima with Neoholstia, yet separation is merited by numerous characters usually associated with generic rank in Euphorbiaceae. Quantitative ecological data and a conservation assessment supplement illustrations and descriptions of the taxon.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
The formerly monotypic genus Paranecepsia Radcl.-Sm. is expanded with the description and illustration of a second species, Paranecepsia andrafiabensis Barberá & O.Lachenaud sp. nov. Molecular ...phylogenetic analyses of plastid rbcL and trnL-F data confirm a sister relationship between the new species and P. alchorneifolia Radcl.-Sm., as members of the alchorneoids clade. Paranecepsia andrafiabensis sp. nov. is notable for expanding the character states for the genus (now including both 2- and 3-locular ovary species) and broadening the geographic range of the genus from continental Africa to Madagascar. The new species adds to the diverse karst limestone endemics of northwestern Madagascar, where it has a very restricted distribution at the base of the western wall of the Ankarana tsingy. An amended generic description of Paranecepsia and a key to the species are also presented. Paranecepsia andrafiabensis sp. nov. is provisionally assessed as VU D1 based on the IUCN Red List criteria.
We present a preliminary discussion about cauliflory, sexual dimorphism and biogeographic patterns in Drypetes Vahl (Putranjivaceae Endl.), focused on Africa. We also present a taxonomic treatment ...for two new species of cauliflorous trees of this genus from the rainforests of western Central Africa, one endemic to Gabon and known from six gatherings, D. aphanes Quintanar, D.J.Harris & Barberá sp. nov., and the other distributed in Gabon and the Republic of the Congo, D. cauta D.J.Harris, Barberá & Quintanar sp. nov., also known from another six gatherings. They are presented along with D. gabonensis Pierre ex Hutch., known from 25 gatherings made throughout western Central Africa, a species with markedly dimorphic flowers between sexes compared to the rest of the species in the genus. Specimens of these two new species have been confused with D. gabonensis due to some morphological resemblances. This treatment includes the detailed descriptions of these three species, the typification of their names, a comparative table summarizing their main morphological differences, an identification key, an illustration and information about their habitat and distribution. A provisional IUCN Red List assessment shows that D. gabonensis and D. cauta sp. nov. are ‘Vulnerable’ species, and D. aphanes sp. nov. is ‘Endangered’. After the publication of these new species, Drypetes consists of 86 species in continental Africa and the Malagasy Region and 219 species for the whole world.
We publish in this article a new species of tree of Drypetes (Putranjivaceae) from the Democratic Republic of the Congo and Republic of the Congo, D. palustris, which occurs in the Western Congolian ...Swamp Forests ecoregion. It is known from eight gatherings and we compare it with the species with the most similar morphology, D. calvescens, of which we have studied 51 gatherings collected in Central Africa. A taxonomic treatment of both species, including their detailed descriptions, typification of their names, a comparative table summarizing their main morphological differences, an illustration and information about their habitat and distribution are provided. A provisional IUCN Red List assessment shows that D. palustris is Endangered and D. calvescens is of Least Concern.
A taxonomic revision of Trisetum sect. Sibirica is presented. We include descriptions and synonyms of each taxon from a study of 450 vouchers from 35 herbaria. Detailed morphometric descriptions, ...illustrations, distribution maps, identification key, and habitat data are given for each taxon. An identification key for all taxa of Trisetum sect. Sibirica is provided. Morphometric variation of the main characters is shown by box plots. Six names are lectotypified. We recognize six species of Trisetum in the section: T. aeneum, T. bifidum, T. henryi, T. scitulum, T. sibiricum, and T. turcicum. Two infraspecific taxa of T. sibiricum are recognized (T. sibiricum subsp. sibiricum and T. sibiricum subsp. litorale), while T. pauciflorum, T. sikkimense, and T. umbratile are reduced to synonyms of T. sibiricum subsp. sibiricum. Four of the six species of Trisetum sect. Sibirica are endemic to Eastern Asia and New Guinea, while T. turcicum grows in Turkey, the Caucasus, and Northern Iran, and T. sibiricum is widespread from Eastern Europe to Alaska and Canada.
Ataxonomic revision of Trisetum sect. Acrospelion is presented.We include descriptions and synonyms of each taxon from a study of 670 vouchers from 45 herbaria. Detailed morphometric descriptions, ...illustrations, distribution maps, identification key, and habitat data are given for each taxon. Twelve names are lectotypified: Aira halleri Honck., Avena argentea Willd., Avena brevifolia Host, Avena daenensis Boiss., Avena distichophylla Vill., Trisetum argenteum var. parviflorum Parl., Trisetum cavanillesianum Borja & Font Quer, Trisetum distichophyllum subsp. delphinense Beauverd, Trisetum macrotrichum Hack., Trisetum rigidum var. molle Somm. & Levier, Trisetum rigidum var. ovale Somm. & Levier, and Trisetum teberdense var. brevifolium Kharadze. We recognize seven species of Trisetum into the section, which is endemic to Eurasia: T. argenteum, T. buschianum Seredin, T. distichophyllum (Vill.) P. Beauv., T. macrotrichum, T. rigidum (M. Bieb.) Roem. & Schult., T. tamonanteae Marrero Rodr. & S. Scholz, and T. velutinum Boiss. Morphometric variation of the main characters is shown by box plots. The highest diversity is located in the Caucasian Mountains and the Alps, where two species were found in each area. Additionally, one species is endemic to the Canary Islands, a second to southeastern Spain, and a third to the Carpathian Mountains. In contrast with some regional treatments, T. persicum Chrtek is considered a synonym of T. rigidum (M. Bieb.) Roem. & Schult., and T. cavanillesianum Borja & Font Quer a synonym of T. velutinum Boiss. Trisetum rigidum subsp. teberdense (Litv.) Tzvelev and T. buschianum subsp. transcaucasicum (Seredin)Mosul. are recognized as subspecies. Vegetative propagation has been observed for the first time in specimens of T. rigidum and T. velutinum.
A matter of warts Quintanar, Alejandro; Sonké, Bonaventure; Simo-Droissart, Murielle ...
Plant ecology and evolution,
01/2023, Letnik:
156, Številka:
2
Journal Article
Recenzirano
Odprti dostop
Background and aims
– Specimens of a new tree species in the genus
Drypetes
(Putranjivaceae) distributed in Cameroon and eastern Nigeria,
D. stevartii
, were associated with
D. verrucosa
, another ...tree species endemic to Gabon, due to its warty fruits and to the overall morphological resemblances of both species.
Material and methods
– The present study is based on the study of 20 gatherings of
D. verrucosa
and 26 gatherings of
D. stevartii
. Morphological observations on herbarium specimens belonging to the new species and
D. verrucosa
were carried out in order to describe them.
Key results
– This treatment includes the detailed descriptions of these two species, the typification of their names, a comparative table summarizing their main morphological differences, an identification key, photographs of both, as well as information about their distribution, habitat, and phenology. Preliminary IUCN Red List assessments show that both
D. verrucosa
and
D. stevartii
are ‘Near Threatened’ species.
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