Scientific name: Armoracia rusticana P. Gaertn., B. Mey & Scherb.
Common name: Horse-radish
Description
Habit: A hairless perennial, to 1.5 m high.
Stems: Erect.
Leaves: Alternate, stalked, to 50 cm long, undivided, oval to oblong, toothed; basal leaves deeply lobed on young plants, later becoming unlobed.
Flowers: White, actinomorphic, hermaphrodite, 8-10 mm across, in large densely branched panicles; sepals 4, free; petals 4, free; stamens 6 and ovary superior.
Fruits: A silique, but not ripening in Ireland.
Habitat: Roadsides, waste ground, sand-dunes and riverbanks.
Distribution: Rather rare.
Native status: Not native
Of conservation interest: No