This study was aimed to examine the taxonomy of Vitex L. (Lamiaceae Martinov) in Peninsular Malaysia was done. Taxonomic evidences were gained based on morphology, leaf anatomy, micromorphology and distribution of the genus. The morphological and anatomical data were analysed using Multi-Variate Statistical Package (MVSP) and Phylogenetic Analysis Using Parsimony (PAUP) software to obtain of similarity values between species and their evolutionary relationship. Morphological characters which are trichomes were used as the major characters to classify the genus, while leaf anatomical and micromorphological characters were used as supportive evidence. All the data collected were used to construct dichotomous key based on morphological and anatomical characters. Species distribution data were gained from herbarium and field study. A total number of 11 species, one subspecies and two varieties of Vitex were identified. The species include V. gamosepala, V. glabrata, V. longisep.....

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A numerical taxonomic is an algorithm method that is used to evaluate scored characters of continuous characters such as leaf architectures. Leaf architecture characters were scored from 11 Vitex species in Peninsular Malaysia (V. gamosepala, V. glabrata, V. longisepala, V. millsii, V. negundo, V. pinnata, V. quinata, V. trifolia, V. vestita, Vitex sp.1 and Vitex sp.2), one subspecies (V. trifolia subsp. litoralis) and two varieties (V. negundo var. bicolor and V. negundo var. cannabifolia) were investigated using herbarium voucher specimens and fresh specimens collected from the fieldwork. Species collected were from Pasoh Forest Reserve, Negeri Sembilan; Gunung Lambak Forest Reserve, Johor; Sungai Dara Forest Reserve, Perak; Proton City, Tanjong Malim, Perak; Gunung Lambak Forest Reserve, Johor; Cameron Highland, Pahang; Herb Walk Garden, Langkawi; and Kg. Pulau Belanga, Kota Bharu, Kelantan. All the studied Vitex species shared leaf architecture as follow: arrangement (opposite), ma.....

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