Hypericum amblysepalum Hochst.

Perennial herb, 0.2–0.8 m tall, glabrous to shortly pubescent, erect, not rooting, branching at base and all stem nodes, sterile shoots not distinct. Stems glabrous, eglandular or with some scattered, scarcely prominent amber punctiform glands; internodes 20–40 mm, usually exceeding leaves. Leaves sessile, spreading, sometimes glaucous, glabrous to scabrid or puberulous; lamina (main stem) (15–)20–55 × 2.5–12(–17) mm, oblong or triangular-lanceolate to linear, apex obtuse to rounded, margin sometimes revolute, base cuneate to rounded, 1-veined, usually with (1)2–4 pairs of main lateral branches from lower 2/3 of midrib, with laminar glands pale, numerous, small, marginal glands absent; leaves (axillary and sterile shoots) smaller, narrower, often revolute. Inflorescence ∞-flowered, pyramidal to cylindric, (30–)60–180(–230) mm long, with lateral cymules 1–8-flowered, rarely with up to 5 lower pairs of flowering branches; bracts and bracteoles linear, upper ones with margin eroded. Flowers 20–30 mm in diam., with petals becoming reflexed; buds globose. Sepals equal, up to 1/3 united, 2.5–6.6 × 1–2 mm, spathulate to oblong or circular, rounded; veins 3, not or scarcely prominent; margin regularly or irregularly glandular-denticulate or shortly glandular-fimbriate with glands black, obconic; laminar glands pale, striiform to punctiform. Petals bright? yellow, sometimes red-veined, 10–20 × 5–12 mm, 3–4 × sepals, obovate to broadly elliptic, long-unguiculate, rounded, with margin subentire to glandular-ciliate or -fimbriate, glands black; laminar glands pale, punctiform. Stamens c. 60, longest 8–12 mm; filaments sometimes reddish. Ovary c. 3 × 1.5 mm, ovoid, shortly acuminate; styles 4–5 mm, 1.3–1.6 × ovary. Capsule 7–10 × 4–5 mm, broadly ovoid, rostrate, vittae narrow. Seeds reddish-brown, c. 2 mm long.