Geniostoma glabrum Matsumura (1901: 41)

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

Geniostoma glabrum Matsumura (1901: 41)

Lectotype (designated here) — JAPAN: Bonin : without date, without collector’s name “33. Bonin Max” ( TI [44046a]!; isolectotype: TI [44046b]!) . Syntypes — JAPAN: Bonin : 9 Dec. without year, without collector’s name ( TI [44047]!); Bonin: without date, without collector’s name ( TI [44048]!) .

Distribution: Japan (Bonin Islands).

= G. kasyotense Kanehira & Sasaki (1934: 400–401) .

In the protologue of Geniostoma glabrum, Matsumura (1901) cited a single specimen as “Hab. ins. Bonin (K. Sawada et T. Uchiyama)”. Toyoda (1981) cited the specimen (Sawada and Uchiyama s.n., 1879, TI) as the type. However, no specimens that have these two collecters’ names on the label have been found in any herbaria. One of the collectors, T. Uchiyama, was known as an assistant in the Japanese botanical research team of Tokyo Imperial University, which conducted field expeditions in the Bonin Islands in 1879 ( Nakai 1928a). Most specimens collected during the expedition lack information about locality, collection data and collectors on the label ( Tuyama 1941). However, a decision as to whether the specimens were actually collected in 1879 can be made based on the label data and the handwritings of the identifier. For example, the abbreviation “Max”, on labels and in descriptions, indicates specimens whose duplicates were sent to C.J. Maximowicz ( Tuyama 1941). Three specimens, which were labelled with J. Matsumura’s handwriting as “ Geniostoma glabrum Matsum. ”, were kept at TI and one of them was marked with R. Yatabe’s handwriting “33. Bonin Max”. As J. Matsumura worked at TI and R. Yatabe was one of the major members of the 1879 Japanese botanical research team, we choose the one with flowers of two branches of this specimen (“33. Bonin Max”) as the lectotype.