Continued extensive field exploration in Zamboanga Peninsula (Philippines) revealed a new endemic Ophiorrhiza species, which is herein described from Naga-Kabasalan Protected Landscape (NKPL) of Zamboanga Sibugay. The species is unique among Philippine Ophiorrhiza by having leaf lamina with gray to silver gray abaxial surface. The new species is morphologically similar to O. pubescens and O. erythropilosa by having hairy overall morphology, but it is easily distinguished by having a creeping to decumbent habit and inconspicuous, membranous bracts. A detailed description, color photographs, phenology, geographical distribution, habitat and IUCN conservation status are provided in this paper.

中文翻译：

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Ophiorriza ravifolia（茜草科），菲律宾西南部三宝颜半岛 Naga-Kabasalan 保护区 (NKPL) 发现的一种新特有物种

在三宝颜半岛（菲律宾）继续进行广泛的实地勘探，发现了一种新的特有蛇根物种，本文描述了该物种来自三宝颜锡布盖的 Naga-Kabasalan 保护区 (NKPL)。该物种在菲律宾蛇根属中是独一无二的，因为它的叶层背面呈灰色至银灰色。该新种在形态上与O. pubescens和O. erythropilosa相似，具有毛状的整体形态，但由于具有匍匐至斜卧的习性和不显眼的膜质苞片，因此很容易区分。本文提供了详细的描述、彩色照片、物候、地理分布、栖息地和 IUCN 保护状况。