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Solidago decurrensÌýLoureiro (1790) is the common species of goldenrod native to eastern and southern China, South Korea, Taiwan and much of Japan.Ìý Its range also includes a bit of northern Vietnam and the northern Philippines. The range overlaps with four other native species in eastern Asia. It has smaller heads thanÌýS. dahurica; its leaf bases taper rather than being truncate as inÌýS. kurilensisÌý(²õ²â²Ô´Ç²Ô²â³¾ S. nipponica); it is usually much taller thanÌýS. minutissima, and its lower leaves are much larger than the upper leaves unlike the rheophyteÌýS. yokusaianaÌýwhose serrate upper leaves are less reduced and its fruit bodies are moderately hairy.Ìý The fruit body ofÌýS. decurrensÌýis normally hairless like the fruit body of the rare rheophyte of Okinawa Is.ÌýS. yambaruensis. It is also likely related to the rare rheophyteÌýS. horieanaÌýof Hokkaido, Japan.

It was treated as a distinct species in the English version of the Flora of China ().

The species was divided into three varieties based in part on results of a multivariate study ofÌýS.Ìýser.ÌýSolidagoÌýby Semple et al. (2020):Ìývar.Ìýdecurrens,Ìývar.ÌýinsularisÌý(Kitamura) Semple, andÌývar.ÌýpraeflorensÌý((Nakai) Kitamura.Ìý Var.ÌýdecurrensÌýoccurs over nearly all the range of the species, blooms in the summer and fall, ranges from (14-)21-131 cm in height with the tallest plants often loosing lower stem leaves by the flowering time.Ìý Var.ÌýinsularisÌýoccurs along the Ryukyo Arch, blooms from January to May, and above ground portions of the stem persist with leaves clustered on lower portions of more recent growth.Ìý Var.ÌýpraeflorensÌýoccurs on theÌýIzu archipelago, stems are short, and cypselae are strigose distally.Ìý Further stu of var.ÌýinsularisÌýand var.ÌýpraeflorensÌýis needed.Ìý Sakaguchi et al. (2018) found some molecular differentiation among the varieties, although they did not follow the nomenclature presented here.

Synonyms: Solidago cantoniensis Loureiro neotype same as holotype of A. leiocarpa (Semple et al. 2020); Amphirhapis leiocarpa Benth. in Hook.f., Lond. J. Bot. 1: 488. 1842; S. virgaurea L. ssp. leiocarpa (Bentham) Hultén, Fl. Aleut. 315. 1937; Solidago virga-aurea L. var. glabriuscula Clarke, Comp. Ind. 35. 1876; S. virgaurea var. leiocarpa (Bentham) A. Gray, Mem. Amer. Acad. n.s. 6(2): 395. 1859. non Miq. (1861); S. japonica Kitm., Acta Phytotax.Ìý Geobot.1932; Solidago virgaurea ssp. asiatica Kitamura, Mem. Coll. Sci. Kyoto Univ. Ser. B. 13: 398. 1937. nom. nud.; S. virgaurea var. paludosa Honda, Bot. Mag. Tokyo 40: 95. 1937; S. virgaurea ssp. asiatica

The species is diploid like all other members of theÌýS.Ìývirgaurea complex in the broad sense. Yuzu Sakata is thanked for the digital image of the Japanese plant.

Last revised 17 May 2025 by J.C. Semple

© 2025 J.C. Semple, including all photographs unless otherwise indicated