Abstract
Two new species of Ophiorrhiza collected from Mt Hamiguitan Range Wildlife Sanctuary in Davao Oriental, Philippines, are herein described and illustrated. Ophiorrhiza erythropilosa is the third Philippine species possessing involucral bracts and is further characterized by its predominantly villose stems that appear red due to strikingly red‐violet trichomes, subpersistent bifid stipules, linear involucral bracts without prominent midrib, and 4 mm long urceolate corolla that is villose outside and lightly puberulous inside. Ophiorrhiza hamiguitanensis is characterized by its coriaceous, lanceolate leaves with attenuate apex and base, brochidodromous venation, subpersistent bilobed stipules with slightly recurved acute tips, presence of 1.5–2.5 mm long linear ensiform bracts, heterostylous flowers, clavate calyces and broadly obcordate capsules.
Highlights
Ophiorrhiza L. is the fifth largest genus in Rubiaceae, comprising around 320 species distributed in tropical to subtropical Asia, China and the Pacific, and with its greatest diversity in New Guinea and southeastern Asia (Davis et al 2009, Hareesh 2017, Hareesh and Sabu 2018, Wu et al 2019)
The Ophiorrhiza species were collected from Mt Hamiguitan Mountain Range Wildlife Sanctuary, San Isidro, Davao Oriental, Philippines, in subsequent field surveys conducted in July 2016 and April 2017
Herbarium specimens of the new species have been deposited in the University of Santo Tomas Herbarium (USTH) and the Philippine National Herbarium (PNH)
Summary
Two new endemic species of Ophiorrhiza L. (Rubiaceae: Ophiorrhizeae) from Davao Oriental, Philippines. Two new endemic species of Ophiorrhiza L. G. Alfeche (https://orcid.org/0000-0002-8619-1412), The Graduate School and College of Science, Univ. Alejandro (https://orcid.org/0000-0003-4524-0385) ✉ (gdalejandro@.ust.edu.ph), College of Science, Research Center for the Natural and Applied Sciences, and the Graduate School, Univ.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
