Browsing by Author "Jayeola, A. A."

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    Comparative Study of Leaf Architectural and Epidermal Features in Some Nigerian Species of Bombacaceae
    (2009) Folorunso, A. E.; Jayeola, A. A.; Olaleye-Otunla, O. J.
    Foliar architectural and epidermal studies were conducted on some species in the family Bombacaceae in search of taxonomic and diagnostic characters that could be employed for their classification and identification. Lamina symmetry, leaf form, leaf apex, leaf base, leaf margin, leaf texture, petiole, venation pattern and areolation were studied as the architectural features. Diagnostic architectural characters that distinguish Ceiba pentandra from Bombax species are acute leaf base, pinnate camptodromous venation and veinlets branching three times. Using leaf epidermal characters, the presence of wavy anticlinal wall and cuticular striations delimit Ceiba pentandra from Bombax species. Elliptic leaf form, decurrent leaf base, toothed margin, normal petiole, primary vein size stout 2-4%, veinlets branched twice, well developed and oriented areolation are diagnostic to Adansonia digitate based on the leaf architectural features and the presence of stellate trichome and large stomatal size are the epidermal characters that delimit A. digitata from all the other species in Bombacaceae. Diagnostic features of Bombax species are reported and similarly, the taxonomic characters for all the species in Bombacaceae are symmetrical lamina, coriaceous leaf texture, variation in angle of divergence nearly uniform, epidermal cell polygonal to irregular in shape and hypostomatic stomata. Taxonomic key was conducted based on the characters studied.
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    Floral Morphology of the Polystachya Hook. (Orchidaceae) in Nigeria
    (2002) Jayeola, A. A.; Folorunso, A.
    A study of the floral morphology of the 32 Polystachya Hook. species in Nigeria, all occurring in the wild was undertaken in search of simple, non-technical characters for their identification. The study has revealed that each lip is distinctive and can be recognized on the basis of their macroscopical and microscopical attributes. Additional 8 new records of species for Nigeria, 4 of which were new for West Africa, were included in the study P. cooperi, with large, showy, dense and copious flowers could be explored for domestication. Poor representation of the herbaria specimens for some species suggests that some of them are actually rare and require urgent conservation attention before they are lost to science and horticulture.
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    Use of Fruits and Infructescense Characters in the Identification of the Acacia Mill. (Leguminosae) Species in Nigeria
    (2010) Jayeola, A. A.; Folorunso, A. E.
    Fruits and infructescence characters of 31 Acacia Mill, taxa are described in this study. Three species, Acacia auriculiformis A. Cum.ex Benth. A. auricularis A. Cunn. ex. Benth. and A. schweinfurthii Brenan. & Exell., represent new records for Nigeria while three taxa, denoted as Acacia species unidentified A, Acacia species unidentifed B. Acacia unidentified C cannot be determined reliably using the available flora and resources of the herbarium. Mophometric variants were observed in A. gourinaensis A. Chev., A. sieberiana and A. dudgeoni, with the morphs identified temporarily as A. gourinaensis A. Chev. variant a and A. gourinaensis A. Chev. variant c, A sieberiana DC var. villosa A. Chev. variant a and A. dudgeoni Gaib. ex Hall variant a, respectively. What is not known from this study, however, is if the variation is genecological or not. Presence or absence of trichomes on the fruits and peduncle; fissure, vein and constriction patterns all provided stable characters. Migrations arising from nomadic culture may have accounted for the new additions to the flora. A taxonomic key based on the characters of the fruits and infructenscences is included.