Hypericum simplicistylum Hayata, J. Coll. Sci. Imp. Univ. Tokyo 30(1): 40. 1911; H. geminiflorum var. simplicistylum (Hayata) N. Robson; Takasagoya simplicistyla (Hayata) Y. Kimura.

Shrubs, 0.3-0.4 m tall; branches erect or ascending. Sepals broadly ovate to oblong, 2.5-3 mm. Ovary 4-4.3 mm; styles 3.5-5 mm, 1-1.3(-1.5) × as long as ovary. Capsule cylindric to cylindric-ellipsoid.

● Exposed stony ground, mountain slopes, roadsides; 1500-1800 m. Taiwan.