Acanthaceae - Discussion of the characteristics and phylogenetic relationships of this family with photographs of Carlowrightia hintonii, Brillantaisia nyanzarum, Aphelandra impressa and Thunbergia mysorensis. - http://tolweb.org/Acanthaceae/20878
Description of Acanthaceae - Habit and leaf form, anatomy, morphology, physiology, biochemistry, and geography. - http://delta-intkey.com/angio/www/acanthac.htm