Home > Science > Biology > Flora and Fauna > Plantae > Magnoliophyta > Magnoliopsida > Acanthaceae
This large family of plants comprises 250 genera and 2500 species. They are mostly tropical and typically have entire leaves arranged in opposite pairs. The bracts are often showy and colorful. The flowers mostly occur in spikes and each has 4 or 5 petals. They are often irregularly shaped, with one or more petal sometimes elongated into a protruding tongue.
http://www.botany.hawaii.edu/faculty/carr/acanth.htm
Description of this family with images of individual species.
http://tolweb.org/Acanthaceae/20878
Discussion of the characteristics and phylogenetic relationships of this family with photographs of Carlowrightia hintonii, Brillantaisia nyanzarum, Aphelandra impressa and Thunbergia mysorensis.
http://delta-intkey.com/angio/www/acanthac.htm
Habit and leaf form, anatomy, morphology, physiology, biochemistry, and geography.
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