The genus Plumbago (Plumbaginaceae) in Ethiopia and Eritrea

TY - JOUR

T1 - The genus Plumbago (Plumbaginaceae) in Ethiopia and Eritrea

AU - Friis, Ib

AU - Wilmot-Dear, Melanie

AU - Edmondson, John R.

AU - Wondafrash, Melaku

AU - Demissew, Sebsebe

PY - 2012/12/15

Y1 - 2012/12/15

N2 - The genus Plumbago has a concentration of indigenous species in eastern tropical Africa and Madagascar: nine out of a total of between twelve and twenty-fi ve species. In the Flora of Ethiopia and Eritrea, Vol. 5, published in 2006, only two indigenous species were accounted for: the widespread and common P. zeylanica and a new species, P. truncata, restricted to south-western Ethiopia. The name P. truncata was not formally validated. Since then more collections and fi eld observations of Plumbago have been made in Ethiopia: after revision of the entire material it is concluded that P. truncata is conspecifi c with P. dawei, known from Uganda, Kenya, Tanzania and Madagascar, and that another tropical East African species, P. montis-elgonis, known from Kenya and Tanzania, also occurs in south-western Ethiopia. In Ethiopia the two species are restricted to areas originally covered by moist forest: P. dawei to Transitional Rain Forest and Riverine Forest, while P. montis-elgonis to the lowermost zone of the Moist Afromontane Forest, as these vegetation types have been defi ned by Friis, Sebsebe Demissew and van Breugel. The distribution and ecology of P. dawei and P. montis-elgonis in eastern Africa and Madagascar is also reviewed, using quantitative data available: the distribution as documented by herbarium material is shown, the potential distribution of the species is modelled, and the conservation status of the species is estimated. In spite of their rarity, the two species are attributed to the IUCN category Least Concern (LC) when the category is estimated using EOO and AOO with moderate or large cell size. A rewritten account of the genus Plumbago is provided in the format of the Flora of Ethiopia and Eritrea, taking account of the new fi ndings.

AB - The genus Plumbago has a concentration of indigenous species in eastern tropical Africa and Madagascar: nine out of a total of between twelve and twenty-fi ve species. In the Flora of Ethiopia and Eritrea, Vol. 5, published in 2006, only two indigenous species were accounted for: the widespread and common P. zeylanica and a new species, P. truncata, restricted to south-western Ethiopia. The name P. truncata was not formally validated. Since then more collections and fi eld observations of Plumbago have been made in Ethiopia: after revision of the entire material it is concluded that P. truncata is conspecifi c with P. dawei, known from Uganda, Kenya, Tanzania and Madagascar, and that another tropical East African species, P. montis-elgonis, known from Kenya and Tanzania, also occurs in south-western Ethiopia. In Ethiopia the two species are restricted to areas originally covered by moist forest: P. dawei to Transitional Rain Forest and Riverine Forest, while P. montis-elgonis to the lowermost zone of the Moist Afromontane Forest, as these vegetation types have been defi ned by Friis, Sebsebe Demissew and van Breugel. The distribution and ecology of P. dawei and P. montis-elgonis in eastern Africa and Madagascar is also reviewed, using quantitative data available: the distribution as documented by herbarium material is shown, the potential distribution of the species is modelled, and the conservation status of the species is estimated. In spite of their rarity, the two species are attributed to the IUCN category Least Concern (LC) when the category is estimated using EOO and AOO with moderate or large cell size. A rewritten account of the genus Plumbago is provided in the format of the Flora of Ethiopia and Eritrea, taking account of the new fi ndings.

KW - Faculty of Science

KW - Botanik

KW - Etiopien

KW - Plumbaginaceae

KW - Plumbago

KW - floristik

KW - plantegeografi

KW - conservation

KW - regnskov

KW - økologi

KW - Flora of Ethiopia and Eritrea

U2 - 10.1080/00837792.2012.10670916

DO - 10.1080/00837792.2012.10670916

M3 - Journal article

SN - 0083-7792

VL - 67

SP - 157

EP - 177

JO - Webbia

JF - Webbia

IS - 2

ER -