Hypericum adenotrichum Spach

Perennial herb 0.07–0.32 m tall, erect from decumbent to prostrate rooting base, with stems numerous, spreading and branching from taproot, otherwise not branching below inflorescence. Stems narrowly 2-lined, eglandular; internodes 4–10 mm, shorter than leaves. Leaves sessile, ascending; lamina 7–32 × 2.2–5 mm (excluding auricles), linear to oblong or oblanceolate, slightly paler beneath, thinly chartaceous; apex rounded to obtuse, margin plane, glandular-ciliate, base cuneate with paired glandular-ciliate auricles; venation: 3 main veins from lower 1/4 to 2/5 of midrib, not visibly branched; laminar glands pale, punctiform, dense and sometimes black, scattered and 1–2 subapical; marginal glands black, on long cilia or fimbriae, not co-planar. Inflorescence 3–7(–23)-flowered, from 1–3 nodes, without flowering branches below, the whole obpyramidal to cylindric; bracts and bracteoles elliptic to oblong, auriculate and gland-fringed like leaves. Flowers 20–c. 32 mm in diam.; buds ellipsoid, obtuse. Sepals equal to subequal, not imbricate, basally slightly connate, 6–9 × 1–2 mm (excluding fimbriae), narrowly lanceolate to narrowly oblong or linear, subacute to obtuse, irregularly glandular-fimbriate; veins 3, obscurely branched; laminar glands few, pale and/or black, punctiform; marginal glands black, on lateral fimbriae and apical cilia. Petals bright yellow, veined or tinged red, 9–15 × c. 3.5–4.5 mm, 1.5–1.7 × sepals, oblanceolate, rounded; laminar glands pale or black, distal, few; marginal glands black, lateral, few and apical to subapical on cilia. Stamens (18–)30–40, ‘3’-fascicled, longest 7–11 mm, 0.7 × petals; anther gland amber. Ovary c. 2.5 × 1.5 mm, narrowly ovoid-ellipsoid; styles 3, c. 1.7 × ovary, ascending. Capsule 5–8 × 3–4 mm, about equalling sepals, with 4–8 longitudinal vittae. Seeds mid brown, 1.5–2.2 mm; testa shallowly reticulate to reticulate-scalariform.