Hypericum sphaerocarpum Michx.

Herbs (perennial) or subshrubs, erect or decumbent, not or rarely rhizomatous, unbranched or branched proximally, 2–6 dm. Stems: internodes 2–4-lined. Leaf blades narrowly elliptic or narrowly oblong to linear, 30–70 × 3–15 mm, base not articulated, narrowly cuneate to linear, margins plane to revolute, apex subacute to rounded, midrib with 0–4 pairs of branches. Inflorescences <rounded-corymbiform>, 7–70-flowered, narrowly branched, sometimes with dichasia or branches from to 8 proximal nodes. Flowers 10–15 mm diam.; sepals persistent, not enclosing capsule, 5, broadly ovate to oblong-elliptic, ± unequal, 2.5–5 × 1.5–3 mm; petals 5, bright yellow, oblanceolate-elliptic to elliptic, 5–9 mm; stamens persistent, 45–85; ovary 3-merous, <placentation parietal>. Capsules broadly ovoid to depressed-globose, 4.5–8 × 4–7 mm. Seeds carinate, 2–2.7 mm; testa coarsely reticulate.