Willughbeia coriacea Holotype: Wallich 1620 (K-W) Holotype: Treacher s.n. (K) Beccari 1530 Beccari 1530 (M) Beccari 1530 (P) Isotype: Beccari 1530 (FI) Lectotype: Beccari 1530 (K) Lectotype: Beccari 4030 (K) Beccari 4030 (P) Isotype: Beccari 4030 (FI) Beccari 4030 Holotype: Korthals s.n. (L) Lectotype: De Vriese s.n. (L) De Vriese s.n. Isotype: De Vriese s.n. (P) Lectotype: Borneo, Kalimantan, Pangkalan Lokan., Van Romburgh 9 (BO) Borneo, Kalimantan, Pangkalan Lokan., Van Romburgh 9 (A) Isotype: Borneo, Kalimantan, Pangkalan Lokan., Van Romburgh 9 (BO) Borneo, Kalimantan, Pangkalan Lokan., Van Romburgh 9 (TCD) Borneo, Kalimantan, Pangkalan Lokan., Van Romburgh 9 Holotype: Borneo, Kalimantan, Oetan Angka riboh., Van Romburgh 54 (BO) Isotype: Borneo, Kalimantan, Oetan Angka riboh., Van Romburgh 54 (A) Borneo, Kalimantan, Oetan Angka riboh., Van Romburgh 54 (TCD) Korthals 1042 Borneo, Kalimantan, Moera Teweh., Van Romburgh 48