| 1. |
- Andriamihajarivo, Tefy H., et al.
(författare)
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Phyllopentas flava (Rubiaceae), a New Morphologically Heterodistylous and Functionally Dioecious Species from Madagascar
- 2011
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Ingår i: Systematic Botany. - 0363-6445 .- 1548-2324. ; 36:4, s. 1024-1027
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Tidskriftsartikel (refereegranskat)abstract
- A new species of the Afro-Malagasy genus Phyllopentas Karehed & B. Bremer, Phyllopentas flava Razafim., T. Andriam. et Karehed, is described and illustrated. This plant is restricted to the Itremo region in southeastern Madagascar and is distinct morphologically from the other species of the genus by its pubescent, narrowly ovate to narrowly elliptic leaves, grey-whitish and thickly hairy midribs and secondary veins on the lower surfaces of leaves, and functionally dioecious and heterodistylous flowers. Summaries of distribution, phenology, habitat, and ecology are given and a conservation assessment is also provided.
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| 2. |
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| 3. |
- Ferm, Julia, et al.
(författare)
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Paracarphalea, a new genus of the coffee family segregated from the Malagasy endemic genus Carphalea (Rubiaceae, Rubioideae, Knoxieae)
- 2016
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Ingår i: Phytotaxa. - Magnolia Press : Magnolia Press. - 1179-3155 .- 1179-3163. ; 263:2, s. 98-112
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Tidskriftsartikel (refereegranskat)abstract
- The Malagasy genus Carphalea (Rubiaceae) consists of six species (C. angulata, C. cloiselii, C. kirondron, C. linearifolia, C. madagascariensis, C. pervilleana) of shrubs or small trees and is recognizable by a distinctly lobed calyx, 2(–4)-locular ovaries, each locule with several ovules on a rod-like stalk arising from the base of the locule, and indehiscent fruits. Carphalea linearifolia, rediscovered in 2010, has not previously been included in any Rubiaceae molecular phylogenetic studies. We re-investigated the monophyly of Carphalea using sequence data from chloroplast (rps16 and trnT-F) and nuclear (ITS and ETS) markers analysed with parsimony and Bayesian methods. Carphalea linearifolia forms a clade with C. cloiselii and the type species C. madagascariensis. This clade is sister to a clade consisting of the rest of the Carphalea species plus the genus Triainolepis. According to these results, the new genus Paracarphalea is here described to accommodate Carphalea angulata, C. kirondron, and C. pervilleana. Theconservation status of Carphalea linearifolia is assessed as critically endangered according to IUCN criteria.
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| 6. |
- Kårehed, Jesper, et al.
(författare)
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Evolution of the Australasian families Alseuosmiaceae, Argophyllaceae, and Phellinaceae
- 1999
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Ingår i: Systematic Botany. - 0363-6445 .- 1548-2324. ; 24:4, s. 660-682
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Tidskriftsartikel (refereegranskat)abstract
- Based on results from cladistic analyses of morphology and DNA sequences (the two chloroplast genes rbcL and ndhF), the three Australasian families Alseuosmiaceae, Argophyllaceae, and Phellinaceae are each monophyletic, belong within Asterales, and together form a monophyletic group. Two new rbcL sequences and thirteen new ndhF sequences were obtained. Congruence tests did not reveal any significant incongruence between the two molecular data sets or between the molecular and morphological data. The character evolution of the Alseuosmiaceae-Argophyllaceae-Phellinaceae group is discussed. The Australasian ancestor of this group was probably a woody plant with simple, alternate, serrate leaves and regular, choripetalous, epigynous flowers borne in panicles. All tree families should be retained in line with the "principle of ease of identification."
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| 7. |
- Kårehed, Jesper, 1971-
(författare)
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Evolutionary Studies in Asterids Emphasising Euasterids II
- 2002
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This thesis deals with evolutionary relationships within the asterids, a group of plants comprising about one-third of all flowering plants.Two new families are recognised: Pennantiaceae and Stemonuraceae. The woody Pennantia from New Zealand and Australia is the sole genus of Pennantiaceae. Stemonuraceae consist of a dozen woody genera with a pantropical distribution and a centre of diversity in South East Asia and the Malesian islands. They are characterised by long hairs on their stamens and/or fleshy appendages on their fruits. Both families were formerly included in Icacinaceae. While Pennantiaceae are unrelated to any of the former Icacinaceae and placed in the order Apiales, other former Icacinaceae genera are related to Cardiopteris, a twining herb from South East Asia and Malesia. The monogeneric family Cardiopteridaceae is enlarged as to include also these. Cardiopteridaceae and Stemonuraceae are sister groups and placed in Aquifoliales. The three other families of Aquifoliales are monogeneric and closely related. The Asian Helwingiaceae and the Central/South American Phyllonomaceae are suggested to be merged into Aquifoliaceae (hollies). The genera of Icacinaceae in the traditional sense not placed in any of the above families (all euasterids II) are members of early diverging lineages of the euasterids I and possibly included in the order Garryales.The three woody Australasian families Alseuosmiaceae, Argophyllaceae, and Phellinaceae are confirmed as members of Asterales, despite traditional placements not close to that order. They are, moreover, supported as each other’s closest relatives.The results are based mainly on parsimony analysis of DNA sequence data, but morphological studies have revealed characters in support for the molecularly based conclusions. The gene that has provided most new information is the chloroplast ndhF gene. The results are, however, drawn from combined analyses of sequences from one or several additional genes (atpB, matK, rbcL, 18S rDNA). The data have also been explored with Bayesian analysis, a statistical, model-based method that most recently has been developed for phylogeny reconstruction.
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| 8. |
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| 9. |
- Kårehed, Jesper
(författare)
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Porslinsblommornas gigant
- 2015
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Ingår i: Hemträdgården. - 0018-0343. ; 1, s. 44-46
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Tidskriftsartikel (populärvet., debatt m.m.)
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| 10. |
- Kårehed, Jesper
(författare)
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The family Pennantiaceae and its relationships to Apiales
- 2003
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Ingår i: Botanical journal of the Linnean Society. - : Oxford University Press (OUP). - 0024-4074 .- 1095-8339. ; 141:1, s. 1-24
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Tidskriftsartikel (refereegranskat)abstract
- The early evolution of the flowering plant order Apiales is discussed based on information from morphology and DNAsequences from four genes (ndhF,rbcL,atpBandmatK). A model-based approach of analysis, Bayesian inference, isused to analyse the data and the results are compared with those from parsimony analysis. In particular, a new familyof the order, the monogeneric Pennantiaceae from New Zealand and Australia, aids in the understanding of howthe order originated. The ancestor of Apiales was probably a shrub or small tree with alternate, simple leaves, paniculateinflorescences, five-merous flowers with free petals, and drupes.
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