Hibiscus glaber Matsumura ex Nakai (1914b: 310)

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 : 40

Hibiscus glaber Matsumura ex Nakai (1914b: 310)

≡ H. tiliaceus Linnaeus var. glaber Matsumura (1897: 441) , nom. nud. ≡ Paritium glabrum (Matsum. ex Nakai) Nakai (1936: 99) ≡ Talipariti glabrum (Matsum. ex Nakai) Fryxell (2001: 245) Type (lectotype, designated here):— JAPAN. Bonin (= “Ogasawarajima” in roman letters), without date, s. coll. (TI [03265]!). Additional specimens examined:— JAPAN. Bonin (= “Ogasawarajima” in Japanese), without date, s. coll. (TI [03260]! TI [03261]! TI

[03264]!); Bonin, 10 December (without year), s. coll. (TI [03259]!); Bonin, 23 August (without year), s. coll. (TI [03262]!); Bonin,

26 August (without year), s. coll. (TI [03263]!).

= Hibiscus glaber Matsum. ex Nakai var. cordatus Nakai (1914b: 310)

Type:— JAPAN. Bonin: Chichijima, 13 August 1905, H. Hattori s.n. (holotype, TI [03266]!).

Distribution:— Japan (endemic to the Bonin Islands).

Notes:— Matsumura (1897) listed “ Hibiscus tiliaceus L. var. glabra Matsumura var. nov. Hab. In insula Bonin” as a candidate new variety of H. tiliaceus without a description or diagnosis. Even though the name was nomen nudum, Hattori (1908) and Matsumura (1912) listed the name H. tiliaceus L. var. glabra Matsumura. After Nakai (1914b) legitimately published it as H. glaber Matsumura with the citation of “ Hibiscus tiliaceus , L. var. glabra, Matsumura. ms.,” Matsumura (1916) listed it as H. glaber Matsumura in the checklist of Japanese plants. Nakai (1936) published Paritium glabrum Nakai as a new combination name. Hara (1954) recognized the taxon as H. glaber (Matsumura) Matsumura ex Nakai. Herein , the correct citation is H. glaber Matsumura ex Nakai. On the other hand, no one had indicated the type or cited the specimens until Toyoda (1981) regarded the specimen in TI, whose collectors and collecting year are unknown, as the type. In TI, we found seven specimens with Matsumura’s handwriting of “var. glabra ,” whose collectors and collecting year are unknown, and therefore, we regarded the seven as the original material. Thus, the indication in Toyoda (1981) is inadequate as a lectotypification. Of the original material, four specimens have locality information of “Ogasawarajima” without a collecting date, of which one (TI [03265]) was written in Roman letters and the others (TI [03260], TI [03261], and TI [03264]) in Japanese. The other three original material have the locality information of “Bonin” and a collecting date (without collecting year). Fryxell (2001) later cited “Ogasawarajima, Matsumura s.n. ” in TI as the holotype for H. glaber Matsumura ex Nakai. However , the use of the term holotype is an error to be corrected to lectotype (Art. 9.9 of the ICN, McNeill et al. 2012), and the collector name seems to be a correctable error because we could not find Matsumura’s specimens in TI. We designated the specimen without a collector and a collecting year (TI [03265]), with “Ogasawarajima” written in Roman letters, as the lectotype.