Hypericum calycinum

Extensively creeping, rhizomatous subshrub, aerial branches ascending, to c. 40 cm high; stems 4-ridged. Leaves ovate, 4–8 cm long, 1–3.5 cm wide, base obtuse to truncate, apex obtuse, lower surface greyish. Flowers solitary, terminal; sepals unequal, broadly elliptic or ovate, c. 1–2 cm long, not black-dotted; petals obovate, usually asymmetric, 2.5–4 cm long, yellow, not black-dotted; stamens numerous, a little more than half as long as petals, shortly united at base into 5 bundles; styles 5. Capsule narrowly ovoid, c. 2 cm long, deflexing at maturity; seeds flattened-ellipsoid, c. 1.3 mm long, winged at one end. Flowers Dec.–Mar.