Calluna (Greek, to sweep; the branches are sometimes used for making brooms). Ericaceae. Heather. Low evergreen shrubs cultivated chiefly for their bright rosy pink, rarely white flowers appearing in great profusion late in summer. | Calluna (Greek, to sweep; the branches are sometimes used for making brooms). Ericaceae. Heather. Low evergreen shrubs cultivated chiefly for their bright rosy pink, rarely white flowers appearing in great profusion late in summer. |