Material examined. MALAYSIA – Tawau • Cultivated at Institute for Tropical Biology and Conservation, Kota Kinabalu; 22 Feb 2016; Kartini BORH 4405 (BORH) [original collection: Malaysian Borneo, Sabah, Tawau, Tawau Hills N.P., Tiku River; 04°22 ′N, 117°54′E; 19 Feb 2016].

Identification. A species distinguished from all other species of the S. Asperata clade by leaf blades glossy, bright medium green above and matte, pale green below, densely minutely asper- ous, glossy, deep green petioles, and older plants with a much-elongated decumbent stem. Differentiated from S. sejuncta A.Hay (geographically the closest species) by having staminate and pistillate flower zones contiguous (not separated by a well-defined and conspicuous naked sterile interstice) (Kartini et al. 2017).

Distribution and ecology. Eastern Sabah. Tawau Hills Park on the banks of Tiku River along the trail to Galas Hill. Occurs on steep slopes and earth banks over basalt in wet lowland to hill forest elevation between 90 and 330 m.