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Festuca drakensbergensis (Poaceae): A common new species in the F. caprina complex from the Drakensberg Mountain Centre of Floristic Endemism, southern Africa, with key and notes on taxa in the complex including the overlooked F. exaristata.
Sylvester, Steven P; Soreng, Robert J; Sylvester, Mitsy D P V; Clark, Vincent Ralph.
Afiliação
  • Sylvester SP; College of Biology and the Environment, Nanjing Forestry University, Long Pan Road No. 159, Nanjing, 210037, China Nanjing Forestry University Nanjing China.
  • Soreng RJ; Department of Botany, National Museum of Natural History, Smithsonian Institution, Washington DC 20013-7012, USA Smithsonian Institution Washington United States of America.
  • Sylvester MDPV; College of Biology and the Environment, Nanjing Forestry University, Long Pan Road No. 159, Nanjing, 210037, China Nanjing Forestry University Nanjing China.
  • Clark VR; Afromontane Research Unit and Department of Geography, University of the Free State, Qwaqwa Campus, Phuthaditjhaba, 9866, South Africa University of the Free State Phuthaditjhaba South Africa.
PhytoKeys ; 162: 45-69, 2020.
Article em En | MEDLINE | ID: mdl-33110384
ABSTRACT
We present taxonomic notes on the Festuca caprina complex from southern Africa that includes description and illustration of the new species F. drakensbergensis from the Drakensberg Mountain Centre of Floristic Endemism of South Africa and Lesotho. Festuca drakensbergensis can be differentiated from F. caprina s.l. by forming lax short tufts with extravaginally-branching tillers and lateral-tending cataphyllous shoots or rhizomes present, basal foliage reaching < ½ the length of the culms, with generally shorter leaves and shorter anthers, 0.8-1.6(-1.8) mm long. The species also differs from the overlooked species F. exaristata - currently known from two collections from Lesotho - by its fibrous basal sheaths, usually sharp, keel-like leaf blade midrib, drooping panicle with lightly to densely scabrous pendent panicle branches, longer lemmas, 4.5-5.8 mm long, with awns usually present, 0.5-3 mm long, ovary apices sparsely to densely hairy and anthers 0.8-1.6(-1.8) mm long. Taxonomic notes on the different taxa of the F. caprina complex in southern Africa are also provided, including images, key, and lectotypification of F. caprina var. curvula. This research adds a further two endemic species (F. drakensbergensis and F. exaristata) and two endemic varieties (F. caprina var. irrasa and F. caprina var. macra) to the Drakensberg Mountain Centre of Floristic Endemism.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Incidence_studies Idioma: En Revista: PhytoKeys Ano de publicação: 2020 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Incidence_studies Idioma: En Revista: PhytoKeys Ano de publicação: 2020 Tipo de documento: Article