Cynoglossum longiflorum is a species in the borage family (Boraginaceae) known by the common name Hound's Tongue. It belongs to the genus Cynoglossum and produces its flowers from June to August. The plant's identity is primarily botanical rather than horticultural in the literature, so identification by name and flowering time is the reliable starting point. Gardeners will most often encounter it listed under its botanical name.

Hound's Tongue (Cynoglossum longiflorum) flowers from June to August and is best sited where its summer blooms can be seen.

Cynoglossum is a genus of small-flowered plants in the family Boraginaceae. It includes 81 species native to Eurasia, Africa, New Guinea, and Australia.

Cynoglossum longiflorum

Hound's Tongue | Cynoglossum longiflorum

Cynoglossum nervosum is a species in the genus Cynoglossum (family Boraginaceae), part of a group of small-flowered plants. The genus has a wide native distribution across Eurasia, Africa, New Guinea and Australia. In the UK Cynoglossum nervosum flowers from June to August. Attention to seedheads is sensible because some Cynoglossum species produce burs and contain compounds toxic to grazing animals.

Cynoglossum nervosum is a Cynoglossum species in the borage family that flowers in the UK from June to August.