Skip to main content
Home / Blumea - Biodiversity, Evolution and Biogeography of Plants, Volume 67, Number 1

Open Access A new Philippine species of Ridsdalea (Rubiaceae, Ixoroideae) from karst vegetation in Palawan

Download Article:
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

Document Type: Research Article

Affiliations: 1: Philippine Taxonomic Initiative, Inc., Botanica Building, El Nido, Palawan, Philippines 2: School of Biological Sciences, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand

Publication date: June 1, 2022

This article was made available online on January 17, 2022 as a Fast Track article with title: "A new Philippine species of Ridsdalea (Rubiaceae, Ixoroideae) from karst vegetation in Palawan".

More about this publication?
  • Blumea is an international journal on the biodiversity, evolution and biogeography of plants, including topics on systematics, floristics, phylogeny, morphology and anatomy. For floristic studies, the focus is on tropical Africa south of the Sahara, tropical Southeast Asia with a strong emphasis on Malesia, and South America with emphasis on the Guianas. Papers in Blumea are subjected to peer review and are in English. Blumea is published three times a year, comprising c. 300 pages in total.
    For more information please contact the Publishing Department of the National Herbarium of the Netherlands.

    Fast Track articles are available here
    If there are no articles shown in this section, all the Fast Track articles are published in the latest issue of Blumea.
  • Back issues for Blumea
  • Blumea Supplement Series
  • Ingenta Connect is not responsible for the content or availability of external websites

Share Content

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content