Browsing by Author "Illoh, H. C."

Now showing 1 - 5 of 5
  • Thumbnail Image
    Item
    Open Access
    Comparative Foliar Anatomy of Ten Species in the Genus Hibiscus Linn. in Nigeria
    (2004) Adedeji, O.; Illoh, H. C.
    The foliar anatomy of ten species of Hibiscus in Nigeria is described. The distinguishing characters of taxonomic value include the variation in the shapes of petioles in the proximal region, the variation in the number and arrangement of the vascular bundles, presence or absence of medullary bundles in the pith at the distal end of the petiole, types of trichomes on the lamina and petioles and presence or absence of cuticular striations on the epidermal surfaces. Druses of calcium oxalate crystals occur generally in the genus, however, occurrence, distribution and quantity of these crystals is quite diagnostic on the adaxial and abaxial epidermal surfaces of H. rostellatus.
  • Thumbnail Image
    Item
    Open Access
    Crude Protein Electrophoresis of Seeds of Some Species of Hibiscus
    (1995) Akinwusi, Olubukola; Illoh, H. C.
    Seeds of ten species of Hibiscus L. were collected from different locations within South Western Nigeria and the crude proteins were extracted and analysed by electrophoretic fractionation. The species of the genus have one common band. Interspecific bands varying from eight to nine are common between pairs of species. These show the close genetic relationship of the species. The number and combination of protein bands were taxon-specific.
  • Thumbnail Image
    Item
    Open Access
    Pollen Grain Morphology of Some Species of Hibiscus
    (1996) Akinwusi, Olubukola; Illoh, H. C.
    Pollen grains of ten species of Hibiscus Linn. Were collected from different locations within South Western Nigerian and acetolysed. The various sizes, length of spines, distance between spines, diameter of apertures, distance between apertures and nature of spine end are useful tools in the taxonomy of the Hibiscus species studied.
  • Thumbnail Image
    Item
    Open Access
    Taxonomical Studies of Selected Ornamental Plants
    (2007) Oloyede, F. M.; Illoh, H. C.; Oloyede, F. A.
    The neglect of ornamental horticulture by researchers in Nigeria is now more evident than ever. This might be attributed partly to general lack of interest in ornamental studies and also partly due to plant identification problem. This work is therefore aimed at the collection, identification, description and propagation of eight ornamental plants of Nigeria [Caladium bicolour Wightii, Chrysothemis pulchella (Donn ex Sims) Decne., Coleus blumei Benth, Episcia cupreata (Hook) Hanst, Impatiens balsamina L., Kalanchoe fedtschenkoi Harnet and Perr 'Marginata', Pellaea rotundifolia (G. Forst) Hook and Rhoeo spathacea (discolor) Hance]. The plants were collected in Osun State, Nigeria and identified using standard horticultural literatures and herbarium specimens of the Department of Botany, Obafemi Awolowo University, Ile-Ife, Nigeria. The plants were raised in triplicates at the screen house. Data were collected on growth parameters. Morphological observations showed that the plants were herbaceous and annuals with simple leaf habit. There were variations in the shapes of their apex, base, margin, calyx and petal. The number of their calyx, petal and the leaf arrangement also differ. Reticulate venation was common to them with the exception of C. bicolor and R. spathacea with parallel venation. They possess actinomorphic flowers except I. balsamina with zygomorphic flowers. Almost all the plants studied are propagated by stem cuttings with the exception of I. balsamina, P. rotundifolia and R. spathacea. Their maturity periods range from 25 - 150 days. The need for awareness of the importance of ornamental plants for their values was discussed.
  • Thumbnail Image
    Item
    Open Access
    Vegetative and Floral Morphological Studies of Some Species of Hibiscus Linn. in Nigeria
    (2005) Adedeji, O.; Illoh, H. C.
    A morphological study of ten species of Hibiscus found in Nigeria was conducted in search of useful and stable characters which may enhance the knowledge of the taxonomic status of the genus. Both qualitative and quantitative characters were recorded. Characters of taxonomic value not recorded in the flora of West Tropical Africa include, habit, leaf bases, stipule shape, petal shape, fruit shapes and apices. A new key to the Hibiscus species is included.