Mitrastema yamamotoi Mitrastema yamamotoi Makino in Bot. Mag. Tokyo 23: fig. 1909Type: Yamamoto s.n.=Mitrastemon sumatranum Nakai in Icon. Pl. As. Or. 4: t. 113. 1941Type: Sumatra, Karo Mts., Jochems s.n.=???