Hypericum papuanum Ridl.

Erect or ± straggling shrub or woody herb, 0.1-1.3 m, branches strict or ± lax, creeping and rooting at the base; branchlets 2-4-lined when young, eventually terete. Leaves sessile, 0.6-2.5 by 0.3-1.7 cm, narrowly ovate or ovate-triangular to elliptic or broadly ovate or subcircular, apex subacute or rarely acute to rounded, base rounded to cordate, concolorous, plane, spreading or ascending; 4-5(-6) main lateral veins, ± parallel or diverging, much branched, uniting near margin and apex, with marked, usually ± dense, reticulate venation; laminar glands pale, linear towards the base or wholly punctate and striate or punctate only; intramarginal glands pale only or partly or wholly black. Inflorescence 1-flowered, with or without flowering shoots in uppermost axils, or regularly dichasial or intermediate and irregular; pedicels usually exceeding uppermost leaves, 4-20 mm in fruit. Flowers 1.8-2.6 cm ø, plane; buds ovoid to ellipsoid, subacute. Sepals 3-7(-8) by 1-2½(-3½) mm, free, imbricate, ovate to lanceolate or narrowly oblong or sometimes broadly ovate and foliaceous, acute to rounded, entire; laminar glands pale, linear; submarginal glands black or absent. Petals bright yellow, 9-15 by 4v9 mm, obovate, entire, persistent; apiculus short or obsolete; laminar glands pale, linear, sometimes striate distally; marginal glands absent or black, sometimes only in apiculus, rarely few to numerous elsewhere on margin. Stamens not obviously in fascicles (15-)25-40(-50), longest 6-9 mm, c. *A as long as the petals, persistent; anthers bright yellow, gland amber or occasionally black. Ovary (2-)2½-3(-4) mm, narrowly or rarely broadly ovoid; styles 3 (4-5), 2-3 mm, ¾ as long to as long as the ovary, divergent; stigmas narrowly to broadly capitate; placentas 3(-4-5), parietal. Capsule (5-)7-9(-10) by 3-4½ mm, narrowly ovoid or rarely broadly ovoid to ellipsoid, longitudinally vittate. Seeds yellow-brown to dark brown, 0.7-0.8 mm, cylindric or subcylindric, scarcely carinate, densely linear-foveolate to linear-scalariform.

Wet, or more rarely dry alpine grasslands, bogs and screes, abandoned cultivation; at elevations from 1,800-3,800 metres.

Can be grown by seedlings.