Salvia patens

This herbaceous perennial was introduced into horticulture in 1838 and popularized a hundred years later by the Irish gardener and botanist William Robinson (1838-1935).

The more common varieties reach 30–60 cm (12–24 in) tall and wide, and are covered with hastate shaped mistletoe-green leaves.

[2] Salvia patens is frequently treated as an annual by gardeners due to its sensitivity to hard frost, with bedding plants often put out in spring.

[1] The species [3] and its cultivar 'Cambridge Blue'[4] have gained the Royal Horticultural Society's Award of Garden Merit.

"[5] A collecting trip to Mexico in 1991 led by James Compton discovered a 1.8 m (5.9 ft) tall variety with large deep blue flowers that is available as 'Guanajuato'.