Euphorbia venefica Trémaux ex Kotschy (Euphorbiaceae) and other shrub-like cylindrically stemmed Euphorbia with spirally arranged single spines

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Standard

Euphorbia venefica Trémaux ex Kotschy (Euphorbiaceae) and other shrub-like cylindrically stemmed Euphorbia with spirally arranged single spines. / Weber, Odile; Atinafe, Ergua ; Awas, Tesfaye ; Friis, Ib.

I: Societe des Naturalistes Luxembourgeois. Bulletin, Bind 122, 2020, s. 57-82.

Publikation: Bidrag til tidsskriftTidsskriftartikelfagfællebedømt

Harvard

Weber, O, Atinafe, E, Awas, T & Friis, I 2020, 'Euphorbia venefica Trémaux ex Kotschy (Euphorbiaceae) and other shrub-like cylindrically stemmed Euphorbia with spirally arranged single spines', Societe des Naturalistes Luxembourgeois. Bulletin, bind 122, s. 57-82. <https://www.snl.lu/publications/bulletin/SNL_2020_122_057_082.pdf>

APA

Weber, O., Atinafe, E., Awas, T., & Friis, I. (2020). Euphorbia venefica Trémaux ex Kotschy (Euphorbiaceae) and other shrub-like cylindrically stemmed Euphorbia with spirally arranged single spines. Societe des Naturalistes Luxembourgeois. Bulletin, 122, 57-82. https://www.snl.lu/publications/bulletin/SNL_2020_122_057_082.pdf

Vancouver

Weber O, Atinafe E, Awas T, Friis I. Euphorbia venefica Trémaux ex Kotschy (Euphorbiaceae) and other shrub-like cylindrically stemmed Euphorbia with spirally arranged single spines. Societe des Naturalistes Luxembourgeois. Bulletin. 2020;122:57-82.

Author

Weber, Odile ; Atinafe, Ergua ; Awas, Tesfaye ; Friis, Ib. / Euphorbia venefica Trémaux ex Kotschy (Euphorbiaceae) and other shrub-like cylindrically stemmed Euphorbia with spirally arranged single spines. I: Societe des Naturalistes Luxembourgeois. Bulletin. 2020 ; Bind 122. s. 57-82.

Bibtex

@article{57bdc3d90ec348caac97641ddf4c6f2e,
title = "Euphorbia venefica Tr{\'e}maux ex Kotschy (Euphorbiaceae) and other shrub-like cylindrically stemmed Euphorbia with spirally arranged single spines",
abstract = "On two independent field trips in 2015 and 2018, the authors collected a tall shrublike succulent species of Euphorbia (Euphorbiaceae) in Combretum-Terminalia woodland of the Omo Valley in south-western Ethiopia. These collections represent the easternmost records of E. venefica Tr{\'e}maux ex Kotschy and are the first records from inside the borders of Ethiopia. Euphorbia venefica belongs to a group of large succulent species with single spines borne on a spine-shield and arranged on the cylindrical stem in a spiral. The species in this group are reviewed here, based on material in herbaria and the literature. The East African E. venefica and the West African E. unispina share potential distribution, have overlapping variation in stem- and leaf-morphology and cannot be separated by the characters mentioned in the literature. We consider these two taxa to be one species, to be called E. venefica and distributed from Burkina Faso to Ethiopia. E. poissonii presents characters that may justify it being a separate species restricted to Africa west of Cameroon. Euphorbiadarbandensis N.E. Br. and E. sapinii De Wild. are too poorly known and could not be placed. Conservation assessments suggest that neither E. venefica, nor E. poissonii are threatened.",
keywords = "Faculty of Science, botany, Africa, Ethiopia, environmental modelling, nomenclatute, Taxonomy, biogeography, Sudanian zone, woodlands, succulents",
author = "Odile Weber and Ergua Atinafe and Tesfaye Awas and Ib Friis",
note = "See about publication on https://www.snl.lu/publications-wp/bulletin-de-la-snl/ ISSN: 2716-750X ({\'e}dition en ligne); 0304-9620 ({\'e}dition imprim{\'e}e) Les bulletins parus depuis 2011 ont {\'e}t{\'e} publi{\'e}s sous la licence Creative commons CC BY-NC-ND 3.0 Luxembourg",
year = "2020",
language = "English",
volume = "122",
pages = "57--82",
journal = "Societe des Naturalistes Luxembourgeois. Bulletin",
issn = "0304-9620",

}

RIS

TY - JOUR

T1 - Euphorbia venefica Trémaux ex Kotschy (Euphorbiaceae) and other shrub-like cylindrically stemmed Euphorbia with spirally arranged single spines

AU - Weber, Odile

AU - Atinafe, Ergua

AU - Awas, Tesfaye

AU - Friis, Ib

N1 - See about publication on https://www.snl.lu/publications-wp/bulletin-de-la-snl/ ISSN: 2716-750X (édition en ligne); 0304-9620 (édition imprimée) Les bulletins parus depuis 2011 ont été publiés sous la licence Creative commons CC BY-NC-ND 3.0 Luxembourg

PY - 2020

Y1 - 2020

N2 - On two independent field trips in 2015 and 2018, the authors collected a tall shrublike succulent species of Euphorbia (Euphorbiaceae) in Combretum-Terminalia woodland of the Omo Valley in south-western Ethiopia. These collections represent the easternmost records of E. venefica Trémaux ex Kotschy and are the first records from inside the borders of Ethiopia. Euphorbia venefica belongs to a group of large succulent species with single spines borne on a spine-shield and arranged on the cylindrical stem in a spiral. The species in this group are reviewed here, based on material in herbaria and the literature. The East African E. venefica and the West African E. unispina share potential distribution, have overlapping variation in stem- and leaf-morphology and cannot be separated by the characters mentioned in the literature. We consider these two taxa to be one species, to be called E. venefica and distributed from Burkina Faso to Ethiopia. E. poissonii presents characters that may justify it being a separate species restricted to Africa west of Cameroon. Euphorbiadarbandensis N.E. Br. and E. sapinii De Wild. are too poorly known and could not be placed. Conservation assessments suggest that neither E. venefica, nor E. poissonii are threatened.

AB - On two independent field trips in 2015 and 2018, the authors collected a tall shrublike succulent species of Euphorbia (Euphorbiaceae) in Combretum-Terminalia woodland of the Omo Valley in south-western Ethiopia. These collections represent the easternmost records of E. venefica Trémaux ex Kotschy and are the first records from inside the borders of Ethiopia. Euphorbia venefica belongs to a group of large succulent species with single spines borne on a spine-shield and arranged on the cylindrical stem in a spiral. The species in this group are reviewed here, based on material in herbaria and the literature. The East African E. venefica and the West African E. unispina share potential distribution, have overlapping variation in stem- and leaf-morphology and cannot be separated by the characters mentioned in the literature. We consider these two taxa to be one species, to be called E. venefica and distributed from Burkina Faso to Ethiopia. E. poissonii presents characters that may justify it being a separate species restricted to Africa west of Cameroon. Euphorbiadarbandensis N.E. Br. and E. sapinii De Wild. are too poorly known and could not be placed. Conservation assessments suggest that neither E. venefica, nor E. poissonii are threatened.

KW - Faculty of Science

KW - botany

KW - Africa

KW - Ethiopia

KW - environmental modelling

KW - nomenclatute

KW - Taxonomy

KW - biogeography

KW - Sudanian zone

KW - woodlands

KW - succulents

M3 - Journal article

VL - 122

SP - 57

EP - 82

JO - Societe des Naturalistes Luxembourgeois. Bulletin

JF - Societe des Naturalistes Luxembourgeois. Bulletin

SN - 0304-9620

ER -

ID: 244611655