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ACANTHACEAE ACANTHUS FAMILY

Thomas F. Daniel, Margriet Wetherwax & Lawrence R. Heckard, except as noted

[Annual, perennial herb to] shrub, [tree], nodes generally swollen. Leaf: simple, generally opposite, entire (toothed [lobed]); stipules 0. Inflorescence: variable, with bracts, generally also bractlets. Flower: bisexual; calyx deeply (3)4–5 lobed [(sepals free)]; corolla 4–5 lobed, radial to 2-lipped; stamens 2 or 4, epipetalous, anther sacs sometimes dissimilar in size or placement; ovary superior, 4–many-ovuled, chambers 1–2, placentas axile (free central), stigmas 1–2. Fruit: capsule, loculicidal, generally dehiscing explosively, valves 2. Seed: 1–4[+], each generally subtended by hook-like outgrowth that remains in fruit.
220 genera, 4000 species: especially tropics; some ornamental: Justicia (Beloperone, shrimp-plant), Acanthus, Thunbergia. [Daniel 1998 Proc Calif Acad Sci 50:217–256; Hilu et al. 2003 Amer J Bot 90:1758–1766; Schwarzbach & McDade 2002 Syst Bot 27:84–98] —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Daniel 1984 Desert Plant 5:162–179; Daniel 1998 Proc Calif Acad Sci 50:217–256]

Key to Acanthaceae

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Oct 21 2014
Citation for this treatment: [Author of taxon treatment] 2013. Acanthaceae, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=37, accessed on Oct 21 2014

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