Eastern redbud (Cercis canadensis L.) and Texas redbud [Cercis canadensis var. texensis (S. Watson) M. Hopkins] (Fabaceae Lindl. or Leguminosae Adans.) are popular landscape trees. Their moderate size, early spring flowering, and wide adaptability make them appropriate for many landscape uses. Numerous cultivars in a range of flower colors, leaf colors, and architectural forms are available. The most popular weeping cultivars currently available, ‘Traveller’ (C. canadensis var. texensis) and ‘Covey’ (C. canadensis), have green leaf color. ‘Ruby Falls’ has been released to provide a cultivar with the unique combination of weeping growth habit and purple leaf color. ‘Merlot’ has been released to provide a cultivar with purple leaves and improved plant habit and heat tolerance compared with ‘Forest Pansy’ (C. canadensis), the existing purple-leafed cultivar.
Dirr, M.A. 2009 Manual of woody landscape plants: Their identification, ornamental characteristics, culture, propagation, and uses 6th Ed Stipes Publishing Champaign, IL