Scientific name: Hypericum perforatum L.
Common name: Perforate St. John's-wort
Description
Habit: A hairless perennial, to 90 cm high.
Stems: Erect, slender, 2-weakly raised lines; with rhizomes.
Leaves: Opposite, stalkless, without stipules, 12-20 mm long, entire, oblong, with abundant translucent glands, but without black glands.
Flowers: Yellow, actinomorphic, hermaphrodite, 15-25 mm across, in terminal cymes; sepals 5, free, pointed; petals 5, free, much longer than stamens and with black glands near margin; stamens in 3 (rarely 5) bundles; styles 3, shorter than ovary; ovary superior.
Fruits: A capsule, succulent and berry-like, seeds numerous.
Habitat: Roadsides and dry grassland.
Distribution: Frequent on limestone, very rare elsewhere.
Native status: Native
Of conservation interest: No