Family: mint family (Lamiaceae)
Flowering time: July–August
Size: 10–50 cm
Habitat: rocky, gravelly and ruderal habitats, railway embankments, dry meadows and watercourses
Narrow-leaved hemp-nettle (Galeopsis angustifolia) is an annual with a branched stem that below the nodes is not distinctly swollen. The four-angled stem is densely clothed with short hairs, at the top usually also with glandular hairs. Oppositely arranged, narrow-lanceolate leaves are sessile or indistinctly petiolate. They are 2 to 5 mm wide; the leaf margin is entire or with up to five teeth on each side. In the leaf axils toward the tops of the shoots there are a few bilabiate flowers, 20 to 25 mm long, grouped into inflorescences. The floral bracts supporting the flowers at the top of the inflorescence are at most as long (and not longer) than the cyclamen-colored flowers.
Narrow-leaved hemp-nettle grows on very barren rocky soils in sunny, distinctly warm locations. In Slovenia it is relatively common only in the southwestern (submediterranean) part. In other parts of the country it occurs sporadically, and it avoids Pomurje.
