Hypericum collinum Cham. & Schltdl.

Wiry perennial herb (0.25–)0.3–0.5 m tall, erect, sometimes from decumbent and rooting base, branched above with branches divergent to ascending. Stems 2-lined and ancipitous above, terete below, turning vinous red, eglandular; internodes 10–30 mm, exceeding leaves. Leaves sessile or to 1.5 mm petiolate: lamina 6–20 × 2–9 mm, elliptic-oblong to oblanceolate, paler beneath, chartaceous; apex rounded to retuse, margin plane, base cuneate to angustate; venation: 2–3 pairs of main laterals from lower quarter to half of midrib, tertiary reticulation dense, more visible beneath; laminar glands pale, dense, varying in size; intramarginal glands black, dense. Inflorescence (1)3–c. 20-flowered, from 1–2 nodes, lax, with branches from up to 5 nodes below, the whole subcorymbiform to broadly pyramidal; pedicels 1–9 mm; bracts foliose, bracteoles 3–4 mm long, oblanceolate, entire, often subopposite or alternate. Flowers c. 10 mm in diam., stellate; buds cylindric, rounded, red-veined. Sepals 5, unequal, free, (2.5–)3–4 × 0.8–1.5 mm, lanceolate to oblong or oblanceolate, apiculate-obtuse to rounded, entire or rarely subentire; veins 3–5, outer branching and anastomosing; laminar glands all pale or rarely a few black, linear and distally punctiform; marginal glands black, few, intramarginal to very rarely prominent, or absent. Petals 5, yellow, 5–7 × 2–3 mm, 1.7–2 × sepals, obovate-oblanceolate, rounded, entire or almost so; laminar glands pale, linear to striiform; marginal glands black, numerous, sessile or subsessile. Stamens c. 20–25, ‘3’-fascicled, longest 4.5–5.5 mm, c. 0.8 × petals; anther gland black. Ovary 1.5–2 × 0.8 mm, narrowly ovoid; styles 3, 1.8–2.2 mm, 1.2 × ovary, divergent; stigmas narrowly capitate. Capsule 7 × 3 mm, narrowly ovoid-cylindric, longitudinally vittate. Seeds dark brown, 0.4–0.5 mm long; testa densely reticulate-scalariform.