Topic
Olinia
About: Olinia is a research topic. Over the lifetime, 22 publications have been published within this topic receiving 433 citations.
Papers
TL;DR: Structural analysis of the forest showed the density of individuals > 10 cm DBH to be almost twice as that of individuals with DBH >20 cm, and 11 endemic species, which are included in the IUCN Red List categories, have been recorded.
Abstract: The floristic composition and vegetation structure of Denkoro forest, South Wello Zone of Amhara Region, N Ethiopia, were described during November–December, 2002 A total of 95 sample plots were analysed, and 174 species of vascular plants representing 66 families were recorded Out of these, 41 species were new records reported for the first time from Wello Eleven endemic species, which are included in the IUCN Red List categories, have been recorded Based on the results of vegetation classification, six clusters were recognized and designated as local plant community types: 1) Erica arborea - Hypericum revolutum, 2) Myrsine melanophloeos - Dombeya torrida, 3) Myrsine africana – Maesa lanceolata – Prunus africana, 4) Olinia rochetiana – Olea europaea, 5) Olinia rochetiana – Allophylus abyssinicus – Apodytes dimidiata , and 6) Maytenus gracilipes – Teclea nobilis Structural analysis of the forest showed the density of individuals > 10 cm DBH to be almost twice as that of individuals with DBH >20 cm A higher proportion of woody individuals (ca 65%) fell in the low height classes (ie, SINET: Ethiopian Journal of Science Vol 29(1) 2006: 45–56
70 citations
TL;DR: High polyploidy in species of hlex (Aquifoliaceae) and Erythrina (Leguminosae) is confirmed and previous reports for Cneorurm (Cneoraceae), Oroxylon, and Millingtonia (Bignoniaceae) are substantiated.
Abstract: The following chromosome numbers are reported: Miersia chilensis 2n = 20, Gethyurn atropurpureum 2n = 14 (Alliaceae); Aextoxicon punctatum 2n - 32 (Aextoxicaceae); Nymania capensis 2n = ca. 48 (Aitoniaceae); hlex pedunculosa 2n = 120 (Aquifoliaceae); Oroxylon indicum 2n = 38, Millingtonia hortensis 2n = 30 (Bignoniaceae); Canella alba 2n = 28 (Canellaceae); Cneorum tricoccum 2n = 36 (Cneoraceae); Eucryphia lucida 2n = 30 (Eucryphiaceae); Greyia sutherlandii 2n = 32-34, n - ca. 17 (Greyiaceae); Koeberlinia spinosa 2n =ca. 88 (Koeberliniaceae); Erythrina burttii 2n -ca. 168 (Leguminosae); Rhynchocalyx lawsonioides 2n = 20 (Lythraceae); Montinia carylophyllacea n - 34, 2n = 68 (Montiniaceae); Olinia emarginata 2n = ca. 40(-42), 0. radiata ii = ca. 30(-28) (Oliniaceae); Oftia africana 2n = 38, n - ca. 19 (Scrophulariaceae). A survey of cytology and evolution in the Angiosperms by Raven (1975) has brought to attention many examples of groups that are unknown cytologically. Numerous gaps exist both at the family level and amongst phylogenetically critical subfamilies and genera. The present paper, in which the cytology of several rare or critical taxa is reported, represents a contribution to our knowledge of some of these groups. Of the 22 collections, representing 18 taxa studied here, 11 are believed to be the first reports for the following families: Montiniaceae and Oliniaceae, and if the following are recognized, Aextoxicaceae, Aitoniaceae, Eucryphiaceae, Greyiaceae, Koeberliniaceae and Oftiaceae. In addition to the genera in these families (Montinia, Olinia, Aextoxicon, Nymania, Eucryphia, Gre yia, Koeberlinia, and Oftia), the present report also includes first records for the following genera: Canella (Canellaceae), Gethynin (Alliaceae), and Rhtynchocalyx (Lythraceae). Previous reports for Cneorurm (Cneoraceae), Oroxylon, and Millingtonia (Bignoniaceae) are substantiated while high polyploidy in species of hlex (Aquifoliaceae) and Erythrina (Leguminosae) is confirmed.
30 citations
TL;DR: The cyanogenic glucoside prunasin (2-β- d -glucopyranosyloxy-2-phenylacetonitrile) was isolated from leaves and twigs of Olinia emarginata as mentioned in this paper.
28 citations
TL;DR: Two of the five species of Oliniaceae (Olinia emarginata andO. ventosa), a monotypic and problematic family of the Myrtales, were investigated embryologically, and shared distinctive anther characteristics suggest that they are derived from the common ancestor ofCrypteroniaceae s.
Abstract: Two of the five species ofOliniaceae (Olinia emarginata andO. ventosa), a monotypic and problematic family of theMyrtales, were investigated embryologically.Oliniaceae clearly agree with otherMyrtales in their basic embryological characteristics, and are characterized further by having an ephemeral endothecium, a campylotropous ovule, and a thick, three-five-layered, outer integument. A combination of these three characteristic features is unknown elsewhere inMyrtales, so that embryological features do not support a close relationship with any other member of the order. Shared distinctive anther characteristics (i.e. ephemeral endothecium) suggest thatOliniaceae are derived from the common ancestor ofCrypteroniaceae s. str.,Rhynchocalycaceae, Alzateaceae, andPenaeaceae.
26 citations
TL;DR: Results of numerical phenetic analyses of morphological variation within O. rochetiana sensu lato indicate the existence of four taxa which are recognisable at specific rank corresponding to O. huillensis, hitherto reported to occur only in Angola, occurs widely in southern Africa and shows geographic segregates characterised as O. HUillensis Welw.
Abstract: Previous circumscriptions of Olinia rochetiana A. Juss. (Oliniaceae) presented a taxonomically variable and widespread species complex in central and tropical East Africa. Results of numerical phenetic analyses of morphological variation within O. rochetiana sensu lato indicate the existence of four taxa which are recognisable at specific rank corresponding to O. huillensis Welw. ex A. & R. Fern., O. ruandensis Gilg, O. rochetiana A. Juss. sensu stricto and O. usambarensis Gilg ex Engl. The analyses also indicate that O. huillensis, hitherto reported to occur only in Angola, occurs widely in southern Africa and shows geographic segregates characterised as O. huillensis Welw. subsp. huillensis, O. huillensis subsp. burttdavii Sebola and O. huillensis subsp. discolor Sebola (Map 2). The major delimiting characters were found to be the shapes of petals and leaves, presence or absence of indumentum and the degree of hairiness on floral parts, and the form of inflorescence units (i.e. being either compact or spreading). Phenetic and ecological concepts of species are applied at the specific and subspecific ranks, respectively. Keys to distinguish between the species and infraspecific taxa are presented, and full descriptions and citations of examined specimens are provided.
19 citations
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Performance Metrics
| Year | Papers |
|---|---|
| 2019 | 1 |
| 2018 | 1 |
| 2017 | 1 |
| 2015 | 1 |
| 2013 | 2 |
| 2009 | 1 |