Mauve (H2) flowers, IX–XI; mid-green foliage; very vigorous; height 75–100cm; spread 61–75cm.
Sport on ‘Serlei‘; introduced by James Smith (Darley Dale, Derbyshire, England) by 1927.
Name, see under ‘Serlei‘; grandiflorus = large-flowered. Maxwell & Beale (1927) placed rubra in parenthesis (serlei grandiflora (rubra)), after the name, while Maxwell (1927) gaves this as a synonym of ‘Serlei Rubra’. Classified by Beijerinck as C. vulgaris var. vulgaris f. autumnalis.