Hypericum triquetrifolium

Erect herb to c. 50 cm high, spreading extensively by woody rhizomes; stems terete or indistinctly 2-ridged when young, often black-dotted. Leaves narrowly triangular or somewhat ovate, 3–15 mm long, 1–6 mm wide, margins usually undulate, usually with 1–few marginal black dots. Flowers numerous in broad, open panicles; sepals lanceolate, 1.5–2.5 mm long, entire or sparsely denticulate, not black-dotted; petals 5–8 mm long, yellow, not black-dotted, or with 1 subapical dot; stamens c. 15–30, about as long as petals, shortly fused into 3 bundles; styles 3. Fruit not seen. Flowering time not recorded.