- a European plant, Pulmonaria officinalis, of the borage family, having blue flowers.
- any of various related plants of the genus Mertensia, as the North American M. virginica(Virginia bluebell ), having nodding clusters of blue flowers.
- any of several Eurasian plants of the boraginaceous genus Pulmonaria, esp P. officinalis, which has spotted leaves and clusters of blue or purple flowers: formerly used to treat lung diseases
- any of various boraginaceous plants of the N temperate genus Mertensia, such as Mertensia maritima (sea lungwort), having drooping clusters of tubular usually blue flowers
