Six new species of Barleria L. (Acanthaceae) from Northeast Tropical Africa

Kelbessa, Ensermu; Darbyshire, Iain

doi:10.1007/s12225-017-9725-2

Cited by 5 publications

(4 citation statements)

References 8 publications

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“…Among the documented species, only three species were red listed Ethiopian plant species found in the studied park as reported by Vivero et al [64]. According to Kelbessa et al [65], these endangered species may be able to Te botanical family Fabaceae was represented by the highest number of species followed by Euphorbiaceae. Te dominance of family Fabaceae was reported in several studies conducted in Ethiopia (see [3,6,28]).…”

Section: Discussionmentioning

confidence: 75%

Ecological Study of the Vegetation in the Loka Abaya National Park, Ethiopia

Assefa,

Bekele,

Demissew

et al. 2024

International Journal of Forestry Research

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An ecological study of the vegetation in the Loka Abaya National Park, in the Central Rift Valley of Ethiopia, was conducted. Vegetation data and some environmental variables including physical and chemical properties of the soil, altitude, slope, and ecological disturbance were collected and subjected to the agglomerative hierarchical classification and ordination with the canonical correspondence analysis. For each of the community groups, the mean and standard errors were calculated from the environmental parameters to characterize the community types and quantitative relationships between environmental variables were analyzed by calculating Pearson’s product-moment correlation coefficient using the SAS computer software programme. A total of 198 plant species representing 79 families and 139 genera were collected and documented. Seven plant community types, namely, Vachellia brevispica Harms–Rhus natalensis Krauss, Ficus sur Forssk.–Vachellia albida (Del.) A. Chev., Panicum subalbidum Kunth–Cyperus latifolius Poir, Dodonaea angustifolia L. f.–Ximenia americana L., Combretum molle R.Br ex. G.Don–Combretum collinum Fresen., Ilex mitis (L.) Radlk–Olea europaea L. subsp. cuspidata, and Dichrostachys cinerea (L.) Wight & Arn, were identified. Ilex mitis–Olea europaea L. subsp. cuspidata community had the highest species richness, whereas the least species richness was recorded for the Panicum subalbidum–Cyperus latifolius community. The results of vegetation-environment relationships indicated that the measured environmental variables explained 74.99% of the total variation in floristic data. The results of the canonical correspondence analysis (CCA) of community-environment relationships indicated that among measured environmental variables, altitude (r2 0.0548, P<0.01), slope (r2 = 0.0241, P<0.01), pH (r2 = 0.01855, P<0.01), sodium (r2 = 0.01316, P<0.04), CEC (r2 = 0.01424, P<0.03), magnesium (r2 = 0.01282, P<0.04), potassium (r2 = 0.0152, P<0.02), and soil moisture content (SMC) (r2 = 0.01537, P<0.05) significantly explained the variation in species composition of the communities and their distribution. Therefore, ecosystem-oriented biodiversity conservation and restoration strategies will be implemented by considering these significant environmental variables.

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Section: Discussionmentioning

confidence: 75%

Ecological Study of the Vegetation in the Loka Abaya National Park, Ethiopia

Assefa,

Bekele,

Demissew

et al. 2024

International Journal of Forestry Research

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“…Balkwill & Balkwill () provide a thorough discussion of distribution patterns among Barleria , but considerable revision is required given that 61 new species and 18 new infraspecific taxa have been described and several major accounts for regional Floras have been written since that study (e.g., Ensermu Kelbessa, ; Hedrén, ,b; Darbyshire, ; Darbyshire & Ndangalasi, ; Darbyshire & al., , , ; Shendage & Yadav, ; Champluvier, ; Ensermu Kelbessa & Darbyshire, ). Barleria ranges widely in Africa, Madagascar and Asia (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Many species of Barleria are highly range‐restricted and are of high conservation concern (Balkwill & Balkwill, ; Darbyshire & Luke, ; Ensermu Kelbessa & Darbyshire, ), but our understanding of the drivers behind this local endemism is limited. From southern Africa, there is evidence that some endemism may be related to substrate.…”

Section: Discussionmentioning

confidence: 99%

Phylogenetic relationships among species of Barleria (Acanthaceae, Lamiales): Molecular data reveal complex patterns of morphological evolution and support a revised classification

Darbyshire

Fisher

Kiel

et al. 2019

TAXON

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Barleria is a genus of~300 species of herbs and shrubs in Africa and Asia, with highest diversity in tropical East Africa and southern Africa. The genus is part of Barlerieae (Acanthaceae), a lineage that is distinguished from other Acanthaceae by quincuncial corolla aestivation. Unequivocal synapomorphies have yet to be identified for Barleria. However, among Barlerieae, species of Barleria can be recognized by the combination of 4-partite calyces with the anterior and posterior lobes usually larger than the two lateral lobes, pollen with a coarsely reticulate (honeycomb) exine and the corolla limb variously subactinomorphic to strongly zygomorphic but never markedly bilabiate with a hooded upper lip. All Barleria that we have observed also have filaments that twist through 180°and cross just distal to the synstapetal zone. Barleria species have previously been classified into two subgenera and seven sections based on differences in leaf axil spine systems; configuration of the corolla, androecium and stigma; and morphology of the capsule and seed. We tested the subgeneric classification of Barleria by sampling 53 Barleria species and 9 outgroup species for three plastid intergenic spacers (trnS-G, ndhF-rpl32-trnL (UAG) ) and the nuclear region nrITS. We found a monophyletic Barleria and support for the two currently recognized subgenera; four of seven currently recognized sections are monophyletic but one of these four, sect. Fissimura, is nested within other sections. Species of sect. Fissimura unexpectedly resolved in subg. Barleria with strong support, although previous classifications placed the section in subg. Prionitis. We propose recognizing two subgenera (i.e., Barleria, Prionitis), the latter comprising three sections (i.e., Prionitis, Somalia, Stellatohirta). Barleria encompasses remarkable morphological diversity; we used an ultrametric tree to examine the evolution of nine morphological traits used to define infrageneric taxa in previous classifications. All characters evolved homoplasiously, but a few states (e.g., woody capsule septa) are supported as synapomorphies, and combinations of characters can be used to delimit subgenera. Members of subg. Barleria have 4-seeded capsules that lack a prominent beak, with a transition to 2-seeded capsules in the clade that corresponds to sect. Fissimura. In contrast, members of subg. Prionitis have 2-seeded capsules (reversed to 4-seeded in most members of one clade of sect. Somalia) that generally have a prominent beak. Additionally, we surveyed pollen morphology for 15 species sampled from across the classification. Pollen is consistently tricolporate with a coarse honeycomb exine. We provide an infrageneric classification and key to infrageneric taxa of Barleria.

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“…For example, in the speciesrich genus Barleria L. (Acanthaceae: Acanthoideae: Barlerieae; Manzitto-Tripp et al 2022), 32 species are known from Somalia alone, 12 (37.5%) of which are endemic (numbers modified from POWO 2024), this representing over 10% of the total species richness in Barleria. Several of the endemic species from this region have been described relatively recently, including B. albomarginata Hedrén, B. compacta Malombe & I.Darbysh., B. dentata Hedrén, B. ensermui (Hedrén 2006a; Malombe and Darbyshire 2010;Ensermu and Darbyshire 2018). Many are known from few botanical collections, and B. ensermui and B. ilicifolia are both known only from the type collections, despite being showy, large-flowered species.…”

Section: Introductionmentioning

confidence: 99%

New taxa of Barleria sect. Prionitis (Acanthaceae) from the Horn of Africa biodiversity hotspot in Somalia

Defty,

Darbyshire

2024

webbia

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Two new taxa in Barleria L. sect. Prionitis Nees (Acanthaceae) are described from Somalia, namely Barleria biramosa Defty & I.Darbysh. from central Somalia and B. compacta Malombe & I.Darbysh. subsp. minima I.Darbysh. & Defty from the northeast coastal region. These taxa are further endemics of the Horn of Africa biodiversity hotspot and have highly restricted ranges. Barleria biramosa was previously included within B. punctata Milne-Redh., another range-restricted endemic of the Horn of Africa region form northeast Ethiopia and northern Somalia; an updated description of B. punctata is therefore provided. Notes on the habitat requirements and conservation status (extinction risk) of the species are provided. Barleria biramosa is considered to be globally Endangered whilst B. compacta subsp. minima is currently assessed as Least Concern; the published assessment of Vulnerable for B. punctata is confirmed. With these additions, 11 taxa in 10 species of Barleria sect. Prionitis are currently recognised in Somalia.

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Six new species of Barleria L. (Acanthaceae) from Northeast Tropical Africa

Cited by 5 publications

References 8 publications

Ecological Study of the Vegetation in the Loka Abaya National Park, Ethiopia

Ecological Study of the Vegetation in the Loka Abaya National Park, Ethiopia

Phylogenetic relationships among species of Barleria (Acanthaceae, Lamiales): Molecular data reveal complex patterns of morphological evolution and support a revised classification

New taxa of Barleria sect. Prionitis (Acanthaceae) from the Horn of Africa biodiversity hotspot in Somalia

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