Introduction of Hypericum perforatum:

Hypericum perforatum, also known as Hypericum perforatum, Hypericum minor, Hypericum minor perennial, 20-60 cm tall, glabrous throughout ~ Stem erect, much branched, with 1 longitudinal line on each side of the stem and branches ~ Leaves sessile, crowded close to each other, elliptic to linear, 1-2 cm long, width 0.3-0.7 cm, apex obtuse, base subcordate and amplexicaul, margin entire, involute, firm papery, green above, whitish-green below, scattered pale but sometimes black glandular dots throughout, lateral veins ca. 2 on each side, arising from less than the basal 1/3 of the midvein, obliquely ascending, joining the margins of the leaves, conspicuous with the midvein on both surfaces, vein network sparse and inconspicuous ~ Inflorescences 5-7-flowered dichasial cymes borne on stems and branches apically, several again forming a terminal panicle; bracts and bracteoles linear, to 4 mm long ~ sepals oblong or lanceolate, 3-4 mm long, 1-1.2 mm wide, apex acuminate to acute, margins with black glandular dots, 2 rows of glandular strips and glandular spots across the whole, erect and slightly enlarged when in fruit, to 4.5 mm long ~ petals yellow, oblong or oblong-elliptic, unequal on sides, ca. 1.2 mm long, ca. 0.5 mm wide, margin and 0.5 mm wide, often with black glandular dots on margins and distally ~ Stamens numerous, in 3 bundles, each with about 15 stamens, filaments of varying lengths, up to 8 mm long, anthers yellow, with black glandular dots ~ Ovary ovoid-ovoid, 3 mm long, styles 3, very rarely opening from the base, 4.5 mm long ~ Capsule oblong-ovoid-ovoid, ca. 5 mm long, 3 mm wide, with dorsal glandular strips and lateral yellow-brown capsular glands ~ Seeds black-brown Seeds black-brown, terete, ca. 1 mm long, longitudinally striate, without keel-like projections on both sides, surface with fine honeycomb lines ~ flowering July-August, fruiting September-October.