New research reveals that the Rhododendron pseudochrysanthum var. taitunense is a distinct subspecies, uniquely characterised by its glabrous leaves, larger seeds and specialised pollen morphology.

Found exclusively in the low-elevation mountains of Northern Taiwan, this rare taxon stands clearly apart from its close relatives within the species complex.

Read the full paper: doi.org/10.3897/phytokeys.271.

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Our study examines the morphological and statistical differentiation within the Rhododendron pseudochrysanthum species complex through comparative analyses of macro-and micro-morphological characters. Using significance testing and cluster analysis, our results demonstrate that R. pseudochrysanthum Hayata ssp. morii (Hayata) Yamazaki var. taitunense Yamazaki is distinct from other members of the complex, namely R. morii Hayata, R. pseudochrysanthum Hayata, and R. hyperythrum Hayata. This taxon is characterized by glabrous mature leaves with revolute margins, larger flower buds with an elongated conical shape, larger pollen and seed sizes, and distinct pollen and seed morphology. Furthermore, R. pseudochrysanthum ssp. morii var. taitunense exhibits a restricted and localized distribution, occurring exclusively in low-elevation mountainous areas of Northern Taiwan.

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