Erechtites hieraciifolius (L.) Raf. ex DC

Watanabe-Toma, Kana, Ohi-Toma, Tetsuo & Murata, Jin, 2011, Typification of Angiospermae described from the Bonin Islands 1: Metachlamydeae, Phytotaxa 33, pp. 51-58 : 55-56

Erechtites hieraciifolius (L.) Raf. ex DC . (1838: 294)

var. cacalioides (Fish. ex Spreng.) Grisebach (1864: 381) .

Distribution: a native of troical America, invasive in other tropical regions.

= Senecio muninensis Koidzumi (1919: 218–219)

Lectotype (designated here)— JAPAN: Bonin Chichijima Susaki : 21 Mar. 1917, S, Nishimura 4 ( TI [39895]!) . Syntypes — JAPAN: Bonin Chichijima Susaki : 15 Dec. 1912, S. Nishimura 124 ( TI [39899]!); Bonin Chichijima Susaki: May 1915, S . Nishimura 561 ( TI [39896]!); Bonin Chichijima Oomura: Mar. 1912, B . Kawate Hei8 ( TI [39897]!); Bonin Chichijima Susaki: 21 Mar. 1917, S , Nishimura s.n. (KYO!).

In the protologue of Senecio muninensis, Koidzumi (1919) cited four specimens as “Bonin: insl. Chichishima (lg. S. Nishimura! no. 4, III. 21, 1917; no. 24, I. 12, 1915; no. 561, V. 1915) (lg. B. Kawate! no. 8, III. 1912)”. Three of these specimens were identified as bearing Koidzumi’s handwriting and are housed at TI. We could not find the second specimen “no. 24, I. 12, 1915 ”, however, another specimen (S. Nishimura 124, “1. 12. 15.”) was also found at TI. After comparison with other Nishimura’s specimens, we found that the numbers of “1. 12. 15.” indicated “the first year of the Taisho Era (= 1912), Decmber 15”. Thus, Koidzumi (1919) must have misread “no. 124, 1 (1912). 12 (XII). 15 (15 th)” as “no. 24, I. 12 th, 1915” for the second specimen. Aside from these specimens, we found one without a collector’s number (Bonin Chichijima Susaki, S. Nishimura s.n., 21 March 1917) at KYO, which was collected on the same date as the specimen cited first in the protologue. It most likely corresponds to the specimen “ 21 mars 1917 S. Nishimura” cited by Kitamura (1934), who recorded this name as a synonymy for Erechtites hieraciifolius var. cacalioides . This specimen lacks a collector’s number, but is probably a duplicate specimen found at TI. Of the four original specimens at TI, G. Koidzumi identified one specimen as Senecio muninensis , but the others had been previously identified as a different taxon and revised by Koidzumi. Thus, we select the former specimen (S. Nishimura 4, 21 March 1917) as the lectotype.