The color range among Old Garden Roses is limited to white, pink, mauve, maroon, purple, and crimson. Gallicas are the most richly colored of the Old Garden Roses, with many mauve, maroon, purple, and crimson cultivars. Rosa Mundi' is a striped or variegated form of the deep pink Gallica 'Apothecary's Rose'. The semi-double, fragrant blooms appear once each year in June. There is also a wide variety in color pattern among roses.
Some cultivars have flowers that are shaded with a subtle blending of two or more colors.
Other cultivars have petals that are striped or stippled, or petals whose top and reverse are different colors. It is also common for flower color to change, intensify, or lighten as buds open and expand into mature flowers. Flower diameter among rose cultivars varies from 1 to 6 inches. Inflorescence size measures the number of blooms in a single cluster on a plant. The flowers of some cultivars are borne singly while other cultivars produce flowers in clusters of several dozen.