Solidago horieana (Asteraceae), a New Species from Hokkaido, Northern Japan

Abstract

A new species of Solidago (Asteraceae), S. horieana Kadota, is described from Hokkaido, northern Japan. Solidago horieana is different from S. yokusaiana Makino in having larger capitula, fewer, remote cauline leaves densely strigose with curved hairs on the adaxial side, acuminate involucral phyllaries and subtending leaves and longer outer involucral phyllaries. Solidago horieana occurs along mountain streams of lower elevation in the serpentine area of northern Hokkaido. This new species is both a rheophyte and serpentinophyte.