B. peridoticola

Plant monoecious, epipetric, perennial, cane-like. The specific epithet is derived from the peridotite breccia rock face at the Bat Cave cliffs near Serinsim substation from where it was collected. Begonia peridoticola resembles B. keithii Kiew (Kiew 1998) and B. punchak Kiew & S. Julia (Kiew & Julia 2007) in the cane-like stem and succulent leaves. Begonia keithii is endemic to limestone in the Semporna Forest Reserve in southeastern Sabah. The new species is readily distinguishable from B. keithii in the undulate, lanceolate-ovate (vs. narrowly lanceolate) leaves and cordate (vs. much prolonged) basal lobes. The new species is also similar to B. punchak from limestone areas in Kuching, Sarawak, differing in the persistent (vs. deciduous) stipules; yellow, spiral (vs. crimson, widely Ushaped) styles; and much larger capsular wings (8– 11 mm vs. 2–3 mm wide).

• Classification: Species
• Plant Type: Shrub-like
• Botanical Section: Petermannia
• Origin: Asia, Sabah, Borneo, Malaysia
• Originator: Rimi, C.-I. Peng & C. W. Lin
• Date of Origin: 2009