Strobilanthes flexicaulis

Strobilanthes flexicaulis is a species of flowering plant in the family Acanthaceae, native to the Ryukyus and Taiwan. A much-branched subshrub reaching 1 m, it is found at elevations from 200 to 2300 m, typically beside streams in forests.

Subtaxa
The following varieties are accepted:
 * Strobilanthes flexicaulis var. flexicaulis – Ryukyus, Taiwan
 * Strobilanthes flexicaulis var. tashiroi (Hayata) T.Yamaz. – entire range

All Strobilanthes flexicaulis var. flexicaulis individuals simultaneously flower at six-year intervals, and then die, but S. f. var. tashiroi does not exhibit periodic mass flowering.