e, sc United States, s Mexico, West Indies, Central America, n South America.
Genera 3, species 14 (2 genera, 2 species in the flora).
Members of Cyrillaceae are common shrubs or trees in moist, acidic habitats of the southeastern United States. On morphological, anatomical, and embryological grounds, Cyrillaceae have long been considered closely allied to Ericaceae (W. S. Judd and K. A. Kron 1993); molecular work confirms this placement (A. A. Anderberg et al. 2002). The fruits of some Cyrillaceae, including our species, are frequently devoid of seeds; reproduction is largely by root sprouts (J. L. Thomas 1961).