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Left to right, four taxa in this study, i.e. Orthosiphon aristatus "pink flower", Orthosiphon aristatus "whiteflower", Orthosiphon sp. nov (collected from Waigeo island, West papua), and Orthosiphon sp. nov. (collected from West Java).

Left to right, four taxa in this study, i.e. Orthosiphon aristatus "pink flower", Orthosiphon aristatus "whiteflower", Orthosiphon sp. nov (collected from Waigeo island, West papua), and Orthosiphon sp. nov. (collected from West Java).

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Pollen as a part of plant reproduction plays a role in the closeness of its relationship. Leaf stomata, trichomes, and mericarp structures are also useful for limiting taxon and specific to Orthosiphon. This study aims to determine the relationship of four taxa on Orthosiphon spp. (Lamiaceae family) through the morphology of the leaves, flowers, po...

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... Java". The observations were focused on the leaf, flower, and fruit features (Figure 1). In addition, other prominent characteristics from observations were taken into consideration. ...

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