Iris may be rhizomatous or bulbous perennials, with narrowly leaves and erect stems bearing flowers with 3 large spreading or pendent fall petals, alternating with 3 erect, often smaller, standard petals, in late winter, spring or early summer
<p>I. graminea is a rhizomatous iris 30-40cm tall, with narrow, bright green leaves and plum-scented, reddish-purple flowers 8cm wide, the falls white, strongly veined with violet</p>