Strobilanthes flexicaulis is a species of flowering plant in the family Acanthaceae, native to the Ryukyus and Taiwan. A much-branched subshrub reaching , it is found at elevations from , typically beside streams in forests.
Subtaxa The following varieties are accepted: Strobilanthes flexicaulis var. flexicaulis – Ryukyus, Taiwan Strobilanthes flexicaulis var. tashiroi – 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.
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