Perennial Forget-Me-Not

Cynoglossum

Cynoglossum nervosum
A bushy, upright perennnial, reaching up to 2.5 x 2 feet, that is native to the Himalayas.
The narrow-oblong or lance-shaped leaves are up to 12 inches in length.
The intense blue flowers are borne over a period up to 4 weeks during late spring.
Hardy zones 4 to 9 in full sun or partial shade on light, well drained soil.