Psychotria boninensis Nakai (1927: 560)

Watanabe-Toma, Kana, Ohi-Toma, Tetsuo & Murata, Jin, 2011, Typification of Angiospermae described from the Bonin Islands 1: Metachlamydeae, Phytotaxa 33, pp. 51-58 : 54-55

Psychotria boninensis Nakai (1927: 560) .

P. macrophylla Hayata (1920: 62) [nom. illeg. non P. macrophylla Ruiz & Pav. (1799: 56) ].

Lectotype (designated here)— JAPAN: Bonin Chichijima Futago-yama : 22 July 1905, H. Hattori s.n. ( TI [44077]!) . Syntypes — JAPAN: Bonin Chichijima Renjyudani : 14 July 1905, H . Hattori s.n. ( TI [44078]! and TI [44079]!); Bonin Chichijima Asahi-yama: 25 July 1905, H . Hattori s.n. ( TI [44080]!) .

Distribution: Japan (Bonin Islands).

This taxon was first published validly as Psychotria macrophylla Hayata , with the citation “Chichijima, leg. H. Hattori. 1905” ( Hayata 1920). However, this name was illegitimate because it is a later homonym of “ P. macrophylla Ruiz & Pav. (1799) ”. Therefore, Nakai (1927) published a new name P. boninensis for this taxon, citing three synonyms: P. serpens (non Linnaeus) Hattori (this name is nomen nudum), P. macrophylla Hayata (1920) and P. serpens L. var. macrophylla Koidz. (1918) . The latter two names have the same epithet “ macrophylla ” but they are considered to represent different taxa because Hayata (1920) did not cite the name of P. serpens L. var. macrophylla Koidz. We consider that the basionym of P. boninense Nakai is P. macrophylla Hayata not P. serpens L. var. macrophylla Koidz .. Therefore, the specimen (T. Nakai s.n., 1920, TI), which Toyoda (1981) regarded as the type of this taxon, is inappropriate. In TI, we found four specimens that were collected by H. Hattori in 1905 and that were identified as P. macrophylla Hayata with B. Hayata’s handwriting. It is considered that these specimens are multiple gatherings collected on different days in July 1905 and syntypes of this taxon. Of the four specimens, we selected the specimen (H. Hattori s.n., 22 July 1905), which also included the identification as P. boninensis Hayata (nom. nud.) with B. Hayata’s handwriting, as the lectotype.

= Psychotria serpens L. (1771: 204–205) var. macrophylla Koidz. (1918: 135)

Lectotype (designated here) — JAPAN: Bonin Chichijima Sakai-ura : April 1915, S. Nishimura 563 ( TI [44076]!). Original materials— JAPAN: Bonin Chichijima Sakai-ura: May 1914, S. Nishimura 333 ( TI [44075]!).

No specimens were cited in the protologue of Psychotria serpens L. var. macrophylla Koidz. (1918) . We found only two specimens colleted before 1918, identified with G. Koidzumi’s handwriting as “ Psychotria serpens L. var. macrophylla Koidzumi ” at TI. Because G. Koidzumi was based at TI when he published the name, the TI specimens are appropriate for the type of this taxon (ICBN Art. 9A.4.). Of the two, we selected the specimen (S. Nishimura 563, April 1915), which also has the Japanese name with G. Koidzumi’s handwriting on the label, as the lectotype.