Alstonia rostrata Holotype: Burma, Thanton, Yatheytaung, C.E. Parkinson 6563 (K) Holotype: China, Hainan, Mocheung Ling, Ting-on, N.K. Chun & C.L. Tso 44317 (IBSC) Isotype: China, Hainan, Mocheung Ling, Ting-on, N.K. Chun & C.L. Tso 44317 (A) China, Hainan, Mocheung Ling, Ting-on, N.K. Chun & C.L. Tso 44317 (P) China, Hainan, Mocheung Ling, Ting-on, N.K. Chun & C.L. Tso 44317 (US) China, Hainan, Mocheung Ling, Ting-on, N.K. Chun & C.L. Tso 44317 (K) Wallich 1607 Lectotype: Wallich 1607 (NY) Wallich 1607 (W) Wallich 1607 (M) Wallich 1607 (E) Isotype: Wallich 1607 (C) Wallich 1607 (NY) Wallich 1607 (L) Wallich 1607 (K-W) Wallich 1607 (P) Wallich 1607 (G) Holotype: Peninsular Malaysia, Kedah, Gunong Jerai., Kochummen FRI 32505 (KEP) Peninsular Malaysia, Kedah, Gunong Jerai., Kochummen FRI 32505 (L) Peninsular Malaysia, Kedah, Gunong Jerai., Kochummen FRI 32505 (K) Isotype: Peninsular Malaysia, Kedah, Gunong Jerai., Kochummen FRI 32505 (A) Peninsular Malaysia, Kedah, Gunong Jerai., Kochummen FRI 32505 (SAN)