Topic
Pentzia
About: Pentzia is a research topic. Over the lifetime, 16 publications have been published within this topic receiving 219 citations.
Papers
TL;DR: Within South African Asteraceae-Anthemideae there is a group of genera containing furanosesquiterpenes rather than the common polyacetylenes, which have been investigated morphologically especially with respect to fruit structure and there are 25 new combinations in Afhanasia, Znulanthera, Hymenolepis and Phymaspermum.
Abstract: Within South African Asteraceae-Anthemideae there is a group of genera containing furanosesquiterpenes rather than the common polyacetylenes. Of these genera, Asaemia (Harv.) Ham. ex Benth. & Hook., Athanasia L., Eumorphia DC., Gymno-pcnfzia Benth., Phymaspermum Less. and Sfilpnophyfon Less. have been investigated morphologically especially with respect to fruit structure. As a result of the investigations Stilpnophyton has been reduced to synonomy under Athanasia L. emend. Kallersjo (with 36 spp.) and five species of Athanasia, together with Phaeocephalus S. Moore., are placed in the revived genus Hymenolepis Cass. (with 7 spp.). Brachymerk DC. and four misplaced species of Aihanasia are included in Phymaspermum Less. emend. Kallersjo (with 17 spp.). Nine other misplaced species of Athanasia and one Pentzia Thunb. species have been described as a new genus Inulanihera Kallersjo (with 10 spp.), a group without furanosesquiterpenes. The two monotypic genera Asaemia and Gymnopentzia, and Eumorphia (with 6 spp.) remain unchanged. The interrelationships of the genera possessing furanosesquiterpenes are shown in a cladogram. There are 25 new combinations in Afhanasia, Znulanthera, Hymenolepis and Phymaspermum.
51 citations
TL;DR: A phylogenetic study based on nrDNA ITS and cpDNA ndhF sequence variation for a complete generic sampling of this S hemisphere group of the tribe Anthemideae with its paramount importance for the understanding of the evolutionary history of this plant group.
Abstract: Twenty-nine genera of the tribe Anthemideae (Compositae) (111 genera, ca. 1,800 species) are either restricted to or have their distributional centre in the S hemisphere. We here present a phylogenetic study based on nrDNA ITS and cpDNA ndhF sequence variation for a complete generic sampling of this S hemisphere group of the tribe with its paramount importance for the understanding of the evolutionary history of this plant group. Our results corroborate the paraphyletic nature of the S hemisphere group of Anthemideae as a whole and of the four subtribes (Ursiniinae, Gonosperminae, Thaminophyllinae, Matricariinae) erected by Bremer and Humphries (1993) to accommodate its members. We further show that the genus Osmitopsis and the Cotula- group hold a basal position in the tribe. Members of the subtribe Ursiniinae (that is characterised by the possession of anthers with polarised endothecial tissue) form a paraphyletic group that may, together with a strongly supported monophyletic group around the genus Pentzia, contain the sister group(s) of the Asian and Mediterranean clades of the tribe. As a consequence of the non-monophyletic nature of the subtribes according to Bremer and Humphries (1993), we discuss an alternative generic grouping of the S hemisphere Anthemideae.
45 citations
TL;DR: The reinvestigation of the aerial parts of Otanthus maritimus provided in addition to five known guaianolides 33 new ones, a seco-guaianolate and three monoterpene diols as discussed by the authors.
30 citations
TL;DR: Kallersjo here encompasses 23 species, all of them perennials, and the relationships of Pentzia with two other genera, Marasmodes DC.
21 citations
TL;DR: Pentzia punctata is locally known in the Cape as bergwildeals and is considered to be a more potent medicine than the well-known wildeals (Artemisia afra) and an infusion of the leaves can be taken to treat colds.
7 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2020 | 1 |
| 2019 | 1 |
| 2015 | 1 |
| 2012 | 2 |
| 2011 | 1 |
| 2010 | 1 |