English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

A recent molecular phylogenetic study revealed four distinct evolutionary lineages in the genus  Costularia s.l.  (Schoeneae, Cyperaceae, Poales). Two lineages are part of the  Oreobolus  clade of tribe Schoeneae: the first being a much-reduced genus  Costularia s.s. , and the second a lineage endemic to New Caledonia for which a new genus  Chamaedendron  was erected. The other two lineages were shown to be part of the  Tricostularia  clade of tribe Schoeneae. Based on morphological and molecular data, the genus  Costularia  is here redelimited to represent a monophyletic entity including 15 species, which is restricted in distribution to southeastern Africa (Malawi, Mozambique, South Africa, Swaziland, Zimbabwe), Madagascar, the Mascarenes (La Réunion, Mauritius), and the Seychelles (Mahé). Molecular phylogenetic data based on two nuclear markers (ETS, ITS) and a chloroplast marker ( trnL-F ) resolve the studied taxa as monophyletic where multiple accessions could be included (except for  Costularia laxa  and  Costularia purpurea , which are now considered conspecific), and indicate that the genus dispersed once to Africa, twice to the Mascarenes, and once to the Seychelles. Two endemic species from Madagascar are here described and illustrated as new to science, as is one additional species endemic to La Réunion. Two taxa previously accepted as varieties of  Costularia pantopoda  are here recognised at species level ( Costularia baronii  and  Costularia robusta ). We provide a taxonomic revision including an identification key, species descriptions and illustrations, distribution maps and assessments of conservation status for all species.

Revision of the Afro-Madagascan genus Costularia (Schoeneae, Cyperaceae): infrageneric relationships and species delimitation