Planchonella obovata (R.Br.) Pierre (1890: 35) var. dubia (H.Hara) T. Yamazaki (1993: 98)

Watanabe-Toma, Kana, Ohi-Toma, Tetsuo & Murata, Jin, 2011, Typification of Angiospermae described from the Bonin Islands 1: Metachlamydeae, Phytotaxa 33, pp. 51-58 : 53

Planchonella obovata (R.Br.) Pierre (1890: 35) var. dubia (H.Hara) T. Yamazaki (1993: 98)

Sideroxylon dubium Koidz. ex Nakai (1928b: 7) [nom. nud.]; Nakai (1930: 261) [nom. nud.].

Pouteria obovata (R.Br.) Baehni (1942: 324–326) var. dubia H. Hara (1948: 100) .

Planchonella obovata (R.Br.) Pierre (1890: 35) var. dubia (H.Hara) Hatusima (1973: 30) [comb. nud.].

Lectotype (designated here) — JAPAN: Bonin Chichijima : Jan. 1918, S. Nishimura 31 ( TI [43571a]!; isolectotypes: TI [43571b]! and TI [43571c]!). Original material— JAPAN: Bonin Chichijima Takeda-bokujyo: 1 July 1917, S. Nishimura s.n. ( KYO!).

Distribution: Japan (Bonin Islands, Daito Islands).

Nakai (1928b, 1930) first reported this taxon as “ Sideroxylon dubium Koidzumi ”, but this name was nomen nudum. Hara (1948) validly published Pouteria obovata (R.Br.) Baehni var. dubia H.Hara , with a short description consisting of two Latin words, and citated the name of S. dubium Koidz. ex Nakai (1928b) . Hara (1984) did not cite any specimens, but circumstantial evidence suggests that the specimens annotated by G. Koidzumi before 1928 should be considered original material for this variety. In each of TI and KYO, a specimen identified as “ Sideroxylon dubium Koidzumi ” with the handwriting of G. Koidzumi was found. When Hara (1948) published the name, he was a professor at TI. Therefore, the largest of three branches of the specimen at TI (S. Nishimura 31, January 1918) is selected as the lectotype.