scholarly journals A taxonomic revision of the African genus Desplatsia Bocq. (Malvaceae – Grewioideae)

2019 ◽  
Author(s):  
Julia Wellsow ◽  
Michelle Hart ◽  
Peter Wilkie ◽  
David J. Harris
Keyword(s):  
Conservation Status ◽  
Central Africa ◽  
Taxonomic Revision ◽  
Herbarium Specimens ◽  
Distribution Maps ◽  
West And Central Africa ◽  
Species Descriptions ◽  
First Time ◽  
Trees And Shrubs ◽  
African Genus

A taxonomic revision of Desplatsia Bocq. (Malvaceae s. lat. Juss., subfamily Grewioideae Hochr., tribe Grewieae Endl.) based on about 800 herbarium specimens is presented. Desplatsia is a genus of trees and shrubs found in tropical West and Central Africa and is characterized by subulately divided stipules, the absence of an androgynophore, stamens that are fused to a tube at the base, and large and distinctive fruits that are dispersed by elephants. Four species are recognized (D. subericarpa Bocq., D. chrysochlamys (Mildbr. & Burret) Mildbr. & Burret, D. dewevrei (De Wild. & T.Durand) Burret and D. mildbraedii Burret) and 12 species names are placed into synonymy, two of which have been put into synonymy for the first time: D. floribunda Burret syn. nov. and D. trillesiana (Pierre ex De Wild.) Pierre ex A.Chev. syn. nov. All four species are widely distributed and their conservation status is assessed as Least Concern (LC). A key to the species, full species descriptions, illustrations, a specimen citation list and distribution maps are provided.

A taxonomic revision ofAllium(Alliaceae) in the Canadian prairie provinces

Botany ◽  
2010 ◽  
Vol 88 (9) ◽  
pp. 787-809 ◽  
Author(s):  
Hyeok Jae Choi ◽  
J. Hugo Cota-Sánchez
Keyword(s):  
Native Species ◽  
Conservation Status ◽  
Taxonomic Revision ◽  
Herbarium Specimens ◽  
Ecological Data ◽  
Canadian Prairie ◽  
Distribution Maps ◽  
Allium Schoenoprasum ◽  
Allium Tricoccum ◽  
Prairie Provinces

The taxonomy, rarity, and conservation status of Allium  L. is revised for the Canadian prairie provinces, based on analyses of herbarium specimens and fieldwork. Five species are recognized: Allium schoenoprasum  L., A. geyeri S. Watson var. tenerum M.E. Jones, A. textile A. Nelson & J.F. Macbride, A. cernuum Roth, and A. stellatum Ker Gawler. Distribution maps and a key to species are provided, as well as complete descriptions of the species examined, including new illustrations, information on nomenclatural types, synonymies, and chromosomal and ecological data. A lectotype is designated for A. geyeri var. tenerum. In this study, A. geyeri var. geyeri reported from Alberta and Saskatchewan and ranked in these provinces as having rarity levels S2 and S1, respectively, by the Nature Conservancy, is excluded from the Canadian flora and the rare list of these provinces because it was misidentified from a herbarium specimen of A. textile. Allium tricoccum Solander in W. Aiton is regarded as a non-native species to Manitoba. The rarity and conservation status of Allium in the Canadian prairie provinces is as follows: (i) A. schoenoprasum, listed as S2 in Saskatchewan, is rare in Manitoba, although its rarity status has not been formally assessed in the province; (ii) A. geyeri var. tenerum is the rarest Allium taxon, with distribution restricted to the Waterton Lakes National Park areas of Alberta, and is currently listed as S2; and (iii) A. cernuum was re-evaluated and a rarity level of S1S2 was recommended for the species in Saskatchewan, particularly in its southwestern distributional habitat.

Taxonomic revision of Sabicea subgenus Anisophyllae (Ixoroideae, Rubiaceae) from Tropical Africa, with four new species

Phytotaxa ◽  
2017 ◽  
Vol 293 (1) ◽  
pp. 1 ◽  
Author(s):  
LISE A. ZEMAGHO ◽  
SIGRID LIEDE-SCHUMANN ◽  
OLIVIER LACHENAUD ◽  
STEVEN DESSEIN ◽  
BONAVENTURE SONKE
Keyword(s):  
New Species ◽  
Conservation Status ◽  
Taxonomic Revision ◽  
Herbarium Specimens ◽  
Field Observations ◽  
Tropical Africa ◽  
Center Of Diversity ◽  
Infraspecific Taxa ◽  
Group A ◽  
Species Descriptions

A taxonomic revision of Sabicea subgenus Anisophyllae (Rubiaceae), a group restricted to Central and East Africa, is presented here. This work, based on a study of herbarium specimens and field observations in Cameroon and Gabon, includes a survey of the morphological features of the group, a key to the species, descriptions of all the taxa, and IUCN conservation status assessments. Fifteen species are recognised, four of which are described as new (Sabicea mapiana, S. ndjoleensis, S. parmentierae, S. sciaphilantha), three former varieties are raised to species rank (S. crystallina, S. jacfelicis, S. tersifolia), and one species previously sunk into synonymy is restored (S. bequaertii). Two new infraspecific taxa are also described, Sabicea crystallina subsp. engongensis and S. sciaphilantha subsp. hirsuta. The group has its center of diversity in Gabon, where 10 of the 15 species occur, three of them being endemic to the country.

A revision of the genus Trithrinax (Cryosophileae, Coryphoideae, Arecaceae)

Phytotaxa ◽  
2013 ◽  
Vol 136 (1) ◽  
pp. 1 ◽  
Author(s):  
ÁNGELA CANO ◽  
MATHIEU PERRET ◽  
FRED W. STAUFFER
Keyword(s):  
Morphological Analysis ◽  
Conservation Status ◽  
Natural Populations ◽  
Herbarium Specimens ◽  
Literature Research ◽  
Distribution Maps ◽  
Area Of Occupancy ◽  
Status Assessment ◽  
Species Descriptions

The palm genus Trithrinax is revised and three species and four varieties are accepted (T. brasiliensis var. brasiliensis, T. brasiliensis var. acanthocoma, T. campestris, T. schizophylla var. schizophylla and T. schizophylla var. biflabellata comb. nov.). This taxonomic treatment presents detailed and complete description of all taxa, based on the studies of natural populations in Argentina, Brazil and Paraguay, the morphological analysis of herbarium specimens (including all available types) and an exhaustive literature research. Illustrations are presented for all taxa and identification keys to the species and varieties are proposed. Species descriptions include updated distribution maps, information about their ecology, taxonomic notes and a compilation of common names and uses. The conservation status assessment reveals an important level of threatening for all taxa, ranging from vulnerable (VU) to endangered (EN), mainly due to the decline of the area of occupancy and the quality of habitat.

scholarly journals Taxonomic revision of the genus Wurdastom (Melastomataceae, Cyphostyleae)

2020 ◽  
Author(s):  
Humberto Mendoza Cifuentes
Keyword(s):  
Taxonomic Revision ◽  
The United States ◽  
Conservation Assessment ◽  
Distribution Maps ◽  
Northern Peru ◽  
Conservation Assessments ◽  
Data Deficient ◽  
Herbarium Collections ◽  
First Time ◽  
Trees And Shrubs

Background and Aims: Wurdastom is a little-known neotropical genus, which is poorly represented in herbarium collections. A historical summary,discussion about the tribal position, taxonomic review, and a conservation assessment of each species of the genus was carried out.Methods: Wurdastom specimens of 17 herbarium collections from Colombia (CAUP, COAH, COL, CUVC, FMB, HUQ, PSO, UDBC, UPTC, VALLE), Ecuador (QCA, QCNE), and the United States of America (CAS, F, MO, NY, US) were reviewed, and relevant type collections available at JSTOR Global Plants were consulted. An identification key, descriptions, illustrations and distribution maps for each species were developed. IUCN guidelines and criterio were used for conservation assessments of each species.Key results: In total, 52 Wurdastom collections were found in the revised herbaria. A new species from Colombia is described and new isotypes from the VALLE Herbarium are reported here for the first time. Wurdastom is a small genus of trees and shrubs from central-west Colombia to northern Peru where it grows in Andean and humid lowland tropical forests. The genus, which is assigned to the tribe Cyphostyleae, is characterized by the acrodromous venation, barbellate trichomes on vegetative parts and inflorescences, multiflorous thyrsoid or pleiothyrsoid inflorescence, haplostemonousflowers, petals ≤1 cm long, inferior ovaries, and capsular fruits.Conclusions: Wurdastom includes eight neotropical species, most of them with restricted distributions. One species is assessed here as Threatened (W. sneidernii), two as Vulnerable (W. cuatrecasasii, W. dudleyi), and the rest are treated as Data Deficient.  

A Taxonomic Treatment of Rogiera (Guettardeae, Rubiaceae)

2021 ◽  
Vol 46 (1) ◽  
pp. 186-210
Author(s):  
Alejandro Torres-Montúfar ◽  
Hilda Flores-Olvera ◽  
Helga Ochoterena
Keyword(s):  
Taxonomic Revision ◽  
Morphological Evidence ◽  
Herbarium Specimens ◽  
Phenological Data ◽  
Distribution Maps ◽  
Taxonomic Treatment ◽  
Center Of Diversity ◽  
Previously Treated ◽  
Northern South America ◽  
First Time

Abstract—Rogiera (Guettardeae, Rubiaceae) is a Neotropical genus distributed from Mexico to northern South America that includes shrubs, treelets, or trees, which were previously treated in the taxonomically controversial and confused Rondeletia complex. Rogiera can be recognized among other Rubiaceae by the combination of multiflowered inflorescences, heterostylous flowers, quincuncial corolla aestivation, a hairy ring at the corolla mouth, and capsular fruits with loculicidal dehiscence. Despite the recent taxonomic circumscription of Rogiera there is not a comprehensive taxonomic treatment to it. Moreover, regional floristic treatments disagree on the species circumscriptions, with discrepancies in the number of species of Rogiera from 11 to 20. Based on molecular and morphological evidence studied on field and herbarium specimens, we present a taxonomic revision of Rogiera. We recognize ten species; Mexico is the center of diversity with nine species, four of them endemic. An identification key, descriptions, distribution maps, nomenclatural history, phenological data, and illustrations of all the species in the genus are provided for the first time. Several names required lecto- or epitypifications designated here.

scholarly journals A synopsis of the African genus Whitfieldia (Acanthaceae: Whitfieldieae) and a key to the species

Kew Bulletin ◽  
2021 ◽  
Author(s):  
Aurélie Grall ◽  
Iain Darbyshire
Keyword(s):  
Extinction Risk ◽  
Conservation Status ◽  
Relevant Literature ◽  
Morphological Data ◽  
Full Description ◽  
Herbarium Specimens ◽  
Distribution Maps ◽  
Data Deficient ◽  
Reference Specimens ◽  
African Genus

SummaryWe present a synopsis and an identification key for the 13 species and one subspecies of the African genus Whitfieldia Hook. (Acanthaceae: Acanthoideae: Whitfieldieae). This work is based on the observation and analysis of morphological data from herbarium specimens and photographs of Whitfieldia species, and the study of all the relevant literature on the genus. Whitfieldia latiflos C.B.Clarke ex Stapf from Liberia is reinstated as an accepted species and a full description and illustration are provided. A new subspecies, W. colorata C.B.Clarke ex Stapf subsp. tigrina A.Grall & I.Darbysh., also from Liberia, is described. In addition, W. arnoldiana De Wild. & T.Durand and W. letestui Benoist are treated as synonyms of W. laurentii (Lindau) C.B.Clarke and W. preussii (Lindau) C.B.Clarke respectively for the first time. Eleven names in Whitfieldia are lectotypified. Reference specimens, relevant literature, habitat notes, distribution maps, taxonomic notes and a preliminary assessment of the conservation status and extinction risk are provided for each taxon. Four species are considered to be threatened of which two (W. latiflos and W. rutilans Heine) are assessed as Endangered (EN) while two others (W. purpurata (Benoist) Heine and W. thollonii (Baill.) Benoist) are placed in the Vulnerable (VU) category. In addition, two taxa are assessed as Near Threatened (NT) and one is currently considered to be Data Deficient (DD).

A taxonomic revision of Brachychiton (Sterculiaceae)

1988 ◽  
Vol 1 (3) ◽  
pp. 199 ◽  
Author(s):  
GP Guymer
Keyword(s):  
Chromosome Numbers ◽  
Conservation Status ◽  
Taxonomic Revision ◽  
Sympatric Species ◽  
Herbarium Specimens ◽  
New Combinations ◽  
Separate Genus ◽  
Naturally Occurring ◽  
First Time ◽  
Seed Coats

Brachychiton Schott & Endl. has previously been included under Sterculia and its generic status has been uncertain. Characters of the follicles, seed coats and embryo strongly support the retention of Brachychiton as a separate genus. The genus comprises five sections, including one new section, Oxystele Guymer. Characters useful in identification and classification are reassessed and those found to be of most significance are described in detail and illustrated. Chromosome numbers of 2n = 40 for 12 species are recorded for the first time. Keys for the identification of taxa are given. Detailed new descriptions, distribution (including a map based on herbarium specimens), ecology, conservation status and relationship are provided for each taxon, and most taxa are illustrated. Taxa described as new are: B. acuminatus, B. albidus, B. chillagoensis, B. collinus, B. compactus, B. diversifolius subsp. orientalis, B. fitzgeraldianus, B. grandiflorus, B. megaphyllus, B. muellerianus, B. multicaulis, B. obtusilobus, B. populneus subsp. trilobus, B. spectabilis, B. tridentatus and B. xanthophyllus. The following five new combinations are made: B. garrawayae (Bailey) Guymer, B. tuberculatus (W. Fitzg.) Guymer, B. viridiflorus (W. Fitzg.) Guymer, B. viscidulus (W. Fitzg.) Guymer and B. vitifolius (Bailey) Guymer. Naturally occurring hybrids within the genus are frequent between partially sympatric species. Eight hybrids are recorded and described: B. x allochrous, B. x carneus, B. x excellens, B. x hirtellus, B. x incarnatus, B. x roseus, B. x turgidulus and B. x vinicolor.

A taxonomic revision of the genus Aethionema s.l. (Brassicaceae) in Iran

Phytotaxa ◽  
2018 ◽  
Vol 356 (4) ◽  
pp. 241 ◽  
Author(s):  
HAMID MOAZZENI ◽  
IHSAN A. AL-SHEHBAZ ◽  
DMITRY A. GERMAN ◽  
MOSTAFA ASSADI ◽  
JOCHEN MÜLLER ◽  
...  
Keyword(s):  
Conservation Status ◽  
Taxonomic Revision ◽  
Herbarium Specimens ◽  
Distribution Maps

The present revision focuses on the enigmatic Southwest Asian genus Aethionema in Iran based on taxonomic literature, fieldwork, and study of over 400 herbarium specimens. As a result of the present study, A. diastrophis and A. transhyrcanum are newly found for Iran. The former is morphologically closer to A. membranaceum and A. kopetdaghi rather than to A. spinosum, under which it was previously synonymized. Aethionema edentulum and A. levandowskyi are placed in the synonymy of A. membranaceum and A. grandiflorum, respectively. The genus is represented in Iran by 16 species, of which six are endemic. Detailed descriptions, distribution maps, IUCN conservation status assessments, and illustrations of the species are provided. The lectotypes of A. cordatum, A. elongatum, A. fimbriatum, A. grandiflorum, A. koenigii, A. moricandianum, A. pallidiflorum, A. pulchellum, A. recurvum, A. schelkownikowii, A. sintenisii, A. spinosum, A. stenopterum, A. umbellatum, A. virgatum, A. woronowii, Lepidium intricatum, and Moriera gracilis are designated.

Insights into the Taxonomy of Citharexylum (Verbenaceae): A Revision of the South American Taxa

2021 ◽  
Vol 106 ◽  
pp. 167-233
Author(s):  
Nataly O'Leary ◽  
Laura A. Frost ◽  
Fabiana Mirra ◽  
Pablo Moroni
Keyword(s):  
South America ◽  
Central America ◽  
Taxonomic Revision ◽  
New Combination ◽  
South American ◽  
Distribution Maps ◽  
New Synonyms ◽  
First Time ◽  
The Relationship ◽  
Trees And Shrubs

Citharexylum L. belongs to the recently circumscribed tribe Citharexyleae of the Verbenaceae, along with Rehdera Moldenke. It comprises around 50 to 60 species of trees and shrubs growing in the Neotropics. A complete taxonomic revision of Citharexylum in South America is here provided for the first time. Thirty taxa are present in South America, 27 of these are endemic, and three of them also grow in Central America. Detailed morphological descriptions are given for each taxon, as well as a key for their identification; illustrations, photographs, or iconography; updated synonymy; geographic distribution maps and ecological notes; list of selected specimens; and discussion about the relationship among closely related taxa. A new status, C. poeppigii Walp. var. anomalum (Moldenke) N. O’Leary, and a new combination, C. dentatum D. Don var. canescens (Moldenke) N. O’Leary, are proposed. Thirty-five new synonyms are suggested, and lectotypes are designated for C. fruticosum L. var. brittonii (Moldenke) I. E. Méndez, C. laurifolium Hayek, and Rauvolfia spinosa Cav.

scholarly journals A revision of Scleria (Cyperaceae) in Madagascar

2019 ◽  
Vol 64 (3) ◽  
pp. 195-213 ◽  
Author(s):  
J. Galán Diaz ◽  
K. Bauters ◽  
L. Rabarivola ◽  
M. Xanthos ◽  
P. Goetghebeur ◽  
...  
Keyword(s):  
Endemic Species ◽  
Habitat Preference ◽  
Taxonomic Revision ◽  
Species Level ◽  
Herbarium Specimens ◽  
Distribution Maps ◽  
Conservation Assessments ◽  
Data Deficient ◽  
Rare Endemic ◽  
First Time

A taxonomic revision of the genus Scleria (Cyperoideae, Cyperaceae) in Madagascar is presented. Herbarium specimens have been examined and 422 identified to species level. Our results recognise 25 species of Scleria from Madagascar, plus an additional heterotypic variety. Eight species are endemic to Madagascar, two are near endemic, eight taxa are also found on mainland Africa, and eight are widespread tropical taxa. Scleria achtenii is reported from Madagascar for the first time, and S. rosea is accepted at species level instead of being considered as a synonym of S. trialata. Distribution maps, conservation assessments, and notes on synonymy, ecology and ethnobotany are provided. Fourty-seven names are typified. Three rare endemic species: S. andringitrensis, S. madagascariensis and S. perpusilla, are assessed as threatened; and a recently described species, S. ankaratrensis, is indicated as Data Deficient. The most species-rich infrageneric taxa, sections Hypoporum, Abortivae and Foveolidia include 18 taxa in total, and showed strong differences in habitat preference.

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