Hypericum trigonum Hand.-Mazz.

Perennial herb 0.25-0.4 m tall, erect from short creeping and rooting base, with stems unbranched below inflorescence or with slender ascending or spreading branches from up to c. 5 upper nodes.  Stems terete, eglandular; internodes 20-43 mm, longer than or equalling leaves.  Leaves sessile, lower not smaller but ascending and soon deciduous; lamina 20-30 ´ 9-15 mm, oblong or oblong-ovate to triangular-ovate, paler beneath, not glaucous, plane, subchartaceous; apex rounded to obtuse, margin entire, base broadly cuneate to shallowly cordate; venation: 4 pairs of main laterals from lower half of midrib, with tertiary reticulation dense; laminar glands punctiform, all pale and very small or all black; intramarginal glands black, dense.  Inflorescence 4-c. 15-flowered from terminal node, with flowering branches from up to 4 nodes below, the whole corymbiform to cylindric; pedicels 1-2.5(-5, central flower) mm; bracts narrowly lanceolate to linear, black-glandular-ciliate and -auriculate (cilia long), persistent.  Flowers 15-c. 25 mm in diam., stellate or reflexed; buds cylindric, rounded.  Sepals 5, equal, erect in bud and fruit, 6-7 ´ 1.5-2 mm, narrowly oblong to elliptic-oblong or lanceolate, acute, glandular-ciliate; veins 5, branching and sometimes reticulating towards margin; laminar glands all pale or parts black, linear or interrupted; marginal glands black, on cilia.  Petals 5, golden yellow, not tinged red in bud, 9-11 ´ 2.5-4.5 mm, c. 1.5(-2?) ´ sepals, narrowly oblong-elliptic to lanceolate-elliptic, acute (i.e. with prominent apiculus), margin entire, laminar glands few, pale, linear and sometimes black, 1-3, subapical; marginal gland solitary, in apiculus, black.  Stamens c. 25-35, '3'-fascicled, longest 7-9 mm, c. 0.75-0.8 ´ petals; anther gland black.  Ovary 3-locular?, c. 4-5 ´ 1.8-2 mm, narrowly ovoid-ellipsoid; styles 3, 4-5 mm, about equalling ovary; stigmas narrowly capitate.  Capsule 7-8 ´ c. 4.5 mm, broadly ellipsoid, c. 1-1.5 ´ sepals; valves with numerous longitudinal vittae.  Seeds not seen.