Check List 15(2): 295-312, doi: 10.15560/15.2.295
A checklist of Rubiaceae species from Eastern Samar, Visayas, Philippines
expand article infoJorge Anton D. Ordas‡, Neil Alejandro A. Pinarok§, Roanne B. Romeroso|, Grecebio Jonathan D. Alejandro‡, Cecilia I. Banag-Moran‡
‡ University of Santo Tomas, Manila, Philippines§ Eastern Samar State University, Borongan, Philippines| University of Eastern Philippines, Catarman, Philippines

Corresponding author: Jorge Anton D. Ordas ( ordasjorge04@gmail.com )

Academic editor: Nik Fadzly N Rosely
© Jorge Anton D. Ordas, Neil Alejandro A. Pinarok, Roanne B. Romeroso, Grecebio Jonathan D. Alejandro, Cecilia I. Banag-Moran.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation: Ordas JAD, Pinarok NAA, Romeroso RB, Alejandro GJD, Banag-Moran CI (2019) A checklist of Rubiaceae species from Eastern Samar, Visayas, Philippines. Check List 15(2): 295-312. https://doi.org/10.15560/15.2.295
Open Access
Abstract
Samar Island is a center of botanical wealth throughout the Philippine archipelago. However, floristic knowledge of the island is deficient and most of its forested areas remain largely unexplored. Thus, floristic surveys of Rubiaceae members were made on Eastern Samar, located in Visayas, Philippines. Collections were conducted from June 2013 to June 2017 within 5 municipalities: Borongan, Balangkayan, Taft, Guiuan, and Llorente. In total, 59 species belonging to 31 genera representing 21 tribes of the family were recorded. The most species-rich tribes belong to Naucleeae, Psychotrieae, and Spermacoceae, with 10, 8, and 6 species, respectively. Of the 59 species recorded, 37 are endemic to the Philippines. Twelve species are listed as threatened species based on its proposed IUCN category and DAO 2017-11. This study presents an enumeration of Rubiaceae found on selected forested areas of Eastern Samar, Philippines.
Keywords
Endangered taxa, floristic survey, forested areas, Gentianales, inventory, Samar Island Natural Park