Hypericum rumeliacum Boiss.

Perennial herb 0.06–0.3(–0.45) m tall, erect to procumbent, rarely rooting, with stems few to numerous, branched at base then unbranched below inflorescence. Stems narrowly (sometimes incompletely) 2-lined, with lines and occasionally infrafoliar region black-gland-dotted or not, sometimes glaucous; internodes (6–)10–27(–40) mm, shorter than or equalling leaves. Leaves sessile or rarely very shortly petiolate, not amplexicaul, erect to ascending; lamina 6–35 × 1–8(–11) mm, ovate-elliptic or sometimes narrowly oblong to lanceolate or linear (uppermost very rarely ovate-lanceolate), paler beneath, chartaceous; apex rounded to acute, margin ± recurved to revolute, entire or (upper) with black-glandular auricles and sometimes marginal black-glandular cilia (‘var. blepharophyllum’), base cuneate to rounded; venation: 2–3 pairs of main laterals from lower quarter to 2/5 of midrib, sometimes branched, without visible tertiary reticulation; laminar glands pale and/or black, scattered to sparse or absent; intramarginal glands black, ± spaced. Inflorescence 1–c. 22-flowered, from 1–2 nodes, without flowering branches below, the whole obconic to divaricate (in fruit); pedicels 1.5–8 mm; bracts and bracteoles reduced-foliar to linear, all or uppermost black-glandular-ciliate and -auriculate. Flowers (20–)25–35 mm in diam., stellate; buds broadly ellipsoid to subglobose, rounded. Sepals 5, equal or subequal, shortly united, 4–9 × 1.5–4 mm, narrowly oblong or oblong-lanceolate to broadly elliptic or ovate-elliptic, acute to obtuse, with glandular cilia alone or glandular fimbriae mixed with glandular cilia and long glandular denticles, these sometimes with sessile marginal glands; veins 3, branching, ± prominent; laminar glands black and sometimes one or two pale, shortly striiform to mostly punctiform; marginal glands black, on fimbriae, cilia and denticles. Petals 5, bright to golden yellow, sometimes tinged or veined red dorsally, 13–20 × 5–12 mm, broadly to narrowly oblanceolate to elliptic, rounded; laminar glands black, punctiform, scattered; marginal glands black, irregularly spaced, sessile or on short cilia. Stamens 60–70, longest 9–12 mm, 0.6–07 × petals. Ovary 2.5–4 × 1.5–2 mm, narrowly ovoid to ovoid-pyramidal; styles 5–9 mm, 1.7–3.3 × ovary. Capsule 7–12 × 4–7 mm, narrowly ovoid to pyramidal-ovoid; valves with round to shortly elongate amber vesicles scarcely or not prominent. Seeds tawny, 1.5 mm; testa ribbed-scalariform.