Morus boninensis Koidzumi (1917: 38)

Ohi-Toma, Tetsuo, Watanabe-Toma, Kana & Murata, Jin, 2015, Typification of Angiospermae described from the Bonin Islands 2: Archichlamydeae, Phytotaxa 227 (1), pp. 35-44 : 38

Morus boninensis Koidzumi (1917: 38)

Type (lectotype, designated here):— JAPAN. Bonin: Chichijima, without date, s. coll. ( TI [00393]!).

Additional specimens examined:— JAPAN. Bonin : Chichijima, Omura, 25 December 1902, K. Kawate s.n. ( TI [00389]!) ; Bonin , July 1899 (Meiji 32th), s. coll. ( TI [00390]!) ; Bonin , July 1912, Kusano s.n. ( TI [00391]!, TI [00392]!) ; Bonin : Chichijima, 13 August 1900 (Meiji 33th), s. coll. ( TI [00394]!) .

= Morus boninensis Koidz. var. caudatifolia Hotta (1938: 28)

Type:— JAPAN. Bonin: Hahajima, Kuwanoki-yama, 18 November 1936, S. Ito, S. Imai & K. Hino s.n. (holotype, SAPS [015172]!).

Distribution:— Japan (endemic to Chichijima, Hahajima and Ototojima in the Bonin Islands).

Notes:—In the protologue of Morus boninensis, Koidzumi (1917) indicated “Hab. Japonia: The Bonin Islands” but cited no specimens. When Hotta (1938) published M. boninensis Koidz. var. caudatifolia Hotta , he cited several specimens without the type status. Toyoda (1981) recognized the specimen in TI, whose collector and collecting year were unknown, as the type of Morus boninensis , but this lectotypification is inadequate because of the lack of specific information. In TI and KYO, we found six and two specimens, respectively, which had the scientific name with “ n. sp. ” on the label written in Koidzumi’s handwriting. The six specimens in TI were collected before the publication of the protologue, but the two in KYO were collected in 1921. Thus, the specimens in TI are regarded as the original material. Of them, the one without the collectors and a collecting year (TI [00393]) seems to correspond to the specimen recognized as a type by Toyoda (1981). The specimen with leaves and flowers has the best condition among the six original material, although the label information is insufficient. We regarded this specimen as the lectotype with respect to the typification of Toyoda (1981).