Alejandro, G J; Meve, U: Rubovietnamia coronula sp. nov. (Rubiaceae: Gardenieae) from the Philippines, Nordic J. Bot., 34, 385-389 (2016)
Rubovietnamia coronula Alejandro and Meve, a new coastal Rubiaceae species from Davao del Sur, Philippines is here described and compared with Rubovietnamia nonggangensis and R. sericantha. This third species of Rubovietnamia is distinct from the two known species by its long leaf petioles, prominently keeled stipules, reduced calyx and corolla, outward curling of corolla lobes in anthesal flowers, included anthers and stigma, glabrous fruits with nectariferous disk, and numerous seeds.
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