Description from Flora of China
Herbs, perennial, 5-10 cm tall (sometimes longer and straggling), suberect to ascending from creeping, branching, and rooting base; stems ± cespitose, sometimes mat-forming, unbranched or ± branched above. Stems 2-4-lined or sometimes becoming nearly terete, eglandular. Leaves sessile or with petiole to 1 mm; blade ovate (below inflorescence) to elliptic or narrowly oblong or obovate, 4-12 × 1.5-6 mm, subleathery, abaxially markedly glaucous and sometimes minutely papillose; laminar glands pale and sometimes black, punctiform, dense to sparse; intramarginal glands black, dense; main lateral veins 2- or 3-paired, tertiary reticulation obscure; base cuneate-angustate, margin entire, apex rounded. Inflorescence 1-5(-7)-flowered, from terminal node, without lower branches, nearly flat-topped; bracts and bracteoles entire or with prominent marginal glands. Flowers 1.2-1.8 cm in diam., ± stellate; buds ovoid to ellipsoid, apex acute. Sepals free, erect, lanceolate to narrowly oblong, equal, 3-5 × 0.8-1.2 mm; laminar glands pale and black, lines to streaks; marginal to intramarginal glands black, irregular; margin entire, apex acute to subacuminate; veins 3-5. Petals ?bright yellow, obovate or oblong-lanceolate to lanceolate, 7-11 × 2-3(-4.5) mm, ca. 3 × as long as sepals; laminar glands pale and usually black, lines to dots; marginal glands absent; margin entire. Stamens ca. 43, obscurely apparently 3-fascicled, longest 5-8 mm, ca. 0.7 × as long as petals. Ovary ?ovoid; styles 3, 4-6 mm, 2-3 × as long as ovary, spreading from base. Capsule narrowly ovoid, 6-7 × ca. 4 mm, 1.5-2 × as long as sepals. Seeds not seen. Fl. Jul-Aug, fr. Aug-Sep.
No single character separates Hypericum nokoense from H. nagasawae (from which it appears to have been derived by reduction); but the combination of small and relatively broad leaves, apically acute sepals usually with black, laminar glands, and styles more than twice as long as the ovary appears to distinguish it. The leaf glands are not completely black.
● Mountain slopes; 1800-1900 m. Taiwan (Hualian, Nantou).