Hypericum scabrum L.

Perennial herb, (0.04–)0.1–0.45(–0.6) m tall, glabrous, erect or decumbent from often woody taproot, not rooting, branching at base and often below inflorescence, with sterile shoots spreading to ascending. Stems scabrid with simple red-tipped glandular emergences, especially towards base, or rarely almost or wholly eglandular and smooth; internodes 1–5 mm, exceeding leaves. Leaves c. 0.3 mm petiolate, spreading, rarely glaucous; lamina (main stem) 7–20(–27) × 1.5–7 mm, lanceolate to linear, apex rounded to mucronate or uncinate, margin sometimes revolute, base cuneate, 1-veined with (1)2 near-basal main lateral branches, with laminar glands pale, numerous and small to few and large, marginal glands numerous, small, sometimes prominent (‘margin eroded’); leaves (axillary and sterile shoots) smaller, narrower, with margins revolute. Inflorescence ∞–5(1)-flowered, corymbiform to capitate, 5–80(–110) mm long, with lateral cymules 2–c. 13-flowered, all or mostly monochasial, without flowering branches below; bracts and bracteoles oblong to linear, entire to eroded or with black glands near apex. Flowers 5–16 mm in diam., with petals spreading; buds globose to shortly cylindric, rounded. Sepals equal, 1/3–2/3 united, not imbricate, 1–2.5 × 0.7–1.2 mm, oblong, rounded; veins 3, sometimes prominent; margin glandular-denticulate to -ciliate or eglandular-ciliate to subentire, with black glands irregular, ellipsoid to globose, or absent; laminar glands pale, in 2 lines. Petals bright or golden yellow, not red-tinged, (3)5–8 × (1)2–3(–5) mm, c. 2–3 × sepals, oblanceolate to obovate, long-unguiculate, rounded, entire, with marginal black glands distal or rarely absent; laminar glands pale, punctiform only or some striiform. Stamens 25–c. 45, longest 4–8 mm; filaments not red-tinged. Ovary 1–3 × 1–1.5 mm, narrowly ovoid-acuminate, not or scarcely rostrate; styles 2–5 mm, 1.7–2 × ovary. Capsule (3)4–8 × 2.5–5 mm, ovoid-acuminate, not or scarcely rostrate; lateral vittae rarely swollen. Seeds dark brown, 1.5–2 mm long.