Globose purple (H10) flowers, VIII–X; mid-green foliage; forms a large dome with side branches in whorls at right angles to the main stem with distinct gaps between successive whorls; height 31–45cm; spread 46–60cm. Similar to ‘Globosa‘ but has a shorter flowering period.

Wild-collected; found in Dorset, England, by D. F. Maxwell (Corfe Mullen, Dorset); introduced by Maxwell & Beale (Broadstone, Dorset) in 1929.

Named from rotundus = round; florus = flower.