Iris ensata var. spontanea is
a perennial herb in swamps or damp grasslands, with rhizome
branching out sideways to grow in colonies. 5-12mm long sword-shaped
leaves erect 30-50cm in height, mid-ribs thick and prominent. Flower
stalks, 40-100cm long, bear some red-purple flowers on the upper
portion, with outer perianths having yellow spots at the bases,
which characterizes this species. Bloom time: June-July.