Iris tuberosa (formerly Hermodactylus tuberosus) is a species of non-rhizomatous plant of the genus Iris, with the common names snake's-head, snake's-head iris, widow iris, black iris, or velvet flower-de-luce.
A native of the Mediterranean region, it is found in the northern Mediterranean littoral and western Europe.
It is grown from tuberous bulbs planted in the autumn. It grows best in full sun to partial shade, and requires well-drained soil. It can naturalise in grassy areas but grows well in ...
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