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DocumentA literature survey on native herbaceous perennials for woodland-style gardens
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Due to climate change, growing cost of labor, and shifts in public attitude towards chemical control of pests and weed, difficulties in maintaining conventional forms of planted landscapes are rising in urban areas. Substituting conventional plantings with alternative vegetation types modeled after natural plant communities may aid resolving this issue. Among various alternative forms of plantings, those based on forest or woodland vegetation are expected to be most suitable in majority of the sites in Korea. However, there is insufficient information available on native forest plants that can be utilized for such plantings. In this study, we have compiled a checklist of native woodland perennials with potential ornamental value, for the purpose of providing basic information in regard to their utilization in urban woodland gardens. The checklist was compiled by the process of screening all herbaceous genera listed within a selection of literatures on the subject of woodland gardening or shade gardening, listing all native taxa belonging to the screened genera, then discarding all taxa unsuited for cultivation under forest or woodland environment. Each taxon was classified as either woodland plant or woodland edge plant based on the garden habitats described by Hansen and Stahl (1993). From the literature, it was determined that a minimum of 293 genera of herbaceous perennials were used for woodland gardens globally, of which 140 genera were native to South Korea. Among the taxa belonging to these genera, 485 taxa were determined to be capable of being used for woodland type plantings. Further research would be necessary for inclusion of taxa with high ornamental value omitted due to lack of information, and detailed evaluation of the ornamental/breeding value and growth requirements of the listed taxa. Keywords: Genetic resources, Research ID: 3621811 -
DocumentAnalysis of tree taxa found in site of forest restoration projects in Korea
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.The monitoring data conducted on 72 forest restoration sites in Korea that have implemented the projects from 2008 to 2020 has been analyzed to identify the trees that are mainly found in those sites. First, taxa with overlapping appearances by site were excluded and a list including growth types was developed. The frequency of appearances by taxon was identified by classifying 27 sites according to the forest landscape and ecosystem management area in order to prevent regional bias of the sites and the main tree species were identified through laws and references. The research has identified 225 taxa trees throughout the entire research sites. In terms of growth type, in the following order, deciduous 187 taxa (83.1%), evergreen 34 taxa (15.1%) and semi-evergreen 4 taxa (1.8%). Arboreal was 121 taxa (53.8%), shrub 77 taxa (34.2%) and vine 27 taxa (12.7%) in the said order. The frequency of appearance in the 27 sites is in descending order: Lespedeza bicolor Turcz., Rubus crataegifolius Bunge, Pinus densiflora Siebold & Zucc. etc. The main tree species were 59 taxa (26.2%) of native plants for forest restoration designated by the Korea Forest Service, 49 taxa (21.8%) of trees recommended for reforestation, and 12 taxa (5.3%) of temperate evergreen broadleaf trees. The study result would contribute to identifying the problems of the tree taxa appearing in the restoration sites and to select trees for the future restoration projects. Keywords: Monitoring and data collection ID: 3622885 -
ArticleTaxonomic value of leaf epidermal markers in discriminating medicinal tree species of Apocynaceae Juss in Nigeria 2022
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No results found.Apocynaceae is a useful family comprising of trees notable for different medicinal remedies. Consequent to their importance vis-à-vis scarcity in the forest, they are being sold in various Nigerian markets by herb sellers mostly in sterile and fragmentary forms. Hence, the medicinal plants are subjected to adulteration and substitution. Identification of the plants by users is done via floristic markers, which are not readily available for such purpose. It becomes pertinent to carry out the taxonomic revision of these trees to provide additional markers that will contribute to their effective identification for correct use. Various documentations have been made on members of apocynaceae and are properly placed on their respective taxa using epidermal traits. However, such information is scarce for Alstonia boonei, Holarrhena floribunda, Rauvolfia vomitoria, Thevetia nerifolia and Vocanga africana. This study therefore aimed at providing epidermal taxonomic markers that could be employed in delimiting the species as an alternative when the fruit or floral parts are wanting. Leaf epidermises of five species of apocynaceae representing 5 genera were studied under a biological microscope with a camera attachment. Data obtained were statistically analyzed. The epidermal cell was penta or hexagonal in A. boonei and V. africana. The stomatal length varied from 20.88 µm (R. vomitoria) to 25.92 µm (T. nerifolia) and 18.96 µm (R. vomitoria) to 29.28 µm (V. africana) on the abaxial and adaxial layers respectively. All the epidermal characters on the adaxial layer were significantly different (p<0.05) among the species. Anticlinal walls were sinuated in H. floribunda and T. nerifolia while in R. vomitoria, it was straight to wavy. V. africana and A. boonei anticlinal walls were straight. This study represents the first account of epidermal characterization of the members of apocynaceae in Nigeria and is of taxonomic importance in setting boundaries among the species. Keywords: Human health and well-being, Biodiversity conservation, Genetic resources ID: 3486776
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