Ridsdalea philippinensis R.Bustam. & Pelser., in Bustamante & Pelser, 2022. |
Abstract
Ridsdalea philippinensis (Rubiaceae), a new species from the karst forest in El Nido (Palawan, Philippines), is described and illustrated. It is unique among Malesian Ridsdalea species in having a corolla tube that is distinctly inflated at the apex, a character state also displayed by R. sootepensis and R. thailandica from Laos and Thailand. Amongst others, R. philippinensis, however, differs from both of these species in having smaller flowers and anthers that do not emerge from the corolla tube. An updated key for Philippine Ridsdalea is also presented.
Keywords: El Nido-Taytay Managed Resource Protected Area; Gardenieae; Malesia; Philippines; Ridsdalea; Rubiaceae
Ridsdalea philippinensis R.Bustam. & Pelser, sp. nov.
A species that is unique among all currently described species of Ridsdalea in displaying a combination of flowers with a corolla tube that is distinctly inflated at its apex and anthers that do not emerge from it.
Distribution — Ridsdalea philippinensis is endemic to El Nido, Palawan (Philippines).
Habitat & Ecology — Tower karst formation. Altitude: c. 150 m. Flowering: June.
Bustamante, R.A.A. and Pelser, P.B. 2022. A New Philippine Species of Ridsdalea (Rubiaceae, Ixoroideae) from Karst Vegetation in Palawan. Blumea - Biodiversity, Evolution and Biogeography of Plants. DOI: 10.3767/blumea.2022.67.01.04
0 Comments