[Botany • 2025] Sarawakia khoonmengiana (Araceae) • A New rheophytic Species from southwest Sarawak, Malaysian Borneo [Schismatoglottideae of Borneo LXXIX]

Sarawakia khoonmengiana S.Y.Wong & P.C.Boyce,
 

in Wong & Boyce, 2025. 

 Sandakania. 27;

Photos: Boyce P.C.

Sarawakia khoonmengiana is described and illustrated as a new species from Lanjak Entimau Wildlife Sanctuary, southwest Sarawak, where it is restricted to exposed shale riverbanks.

Sarawakia khoonmengiana S.Y.Wong & P.C.Boyce.
A. Plants in habitat on vertical silt-covered shales. B. Detail of leaf blade venation, abaxial surface. C. Bloom at pistillate anthesis shown in natural position. D, E. Bloom at staminate anthesis with spathe limb characteristically degrading. Note damage to the appendix in D, and the perpetrators, chrysomelid beetles. F. Bloom at late pistillate antheses with nearside spathe artificially removed, note the expanded interstice staminodes.

Photos: Boyce P.C.

Comparison of spadix morphology of five Sarawakia species.
A. Sarawakia clausula. B. Sarawakia khoonmengiana. C. Sarawakia larynx. D. Sarawakia petradoxa. E. Sarawakia rejangica. Spadix of each with spathe partially or completely removed. Photos: Boyce P.C.

Wong Sin Yeng & Peter C. Boyce. 2025. Schismatoglottideae of Borneo LXXIX: Sarawakia khoonmengiana, A New rheophytic Species from southwest Sarawak, with a conspectus of plant names dedicated to Wong Khoon Meng. Sandakania. 27; 277-284.