Abstract
The taxonomy of the Philippine Rubus species was studied through a phenetic analysis of the morphological data from preserved specimens. After recording the character states, the data were analyzed using cluster analysis and PCA, and the resulting analysis allowed the delimitation of morphologically similar Rubus species. Specimens of the Rubus genus collected in the country were separated into two clusters distinguished by leaf structure. Specimens of the same species are often found in multiple sub-clusters, which suggests the high degree of variation within a species. PCA of morphological data from Rubus species show that leaf and floral characters, which include the maximum number of lobes, pedicel pubescence, outside pubescence of the hypanthium, apex of the simple leaf blade, and the apical process of the sepals, explain the variation in Rubus species in the Philippines.
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