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CELASTRACEAE STAFF-TREE FAMILY

Michael A. Vincent & Barry A. Prigge

Shrub (climbing or not), tree, thorny or not, generally glabrous. Leaf: simple, opposite or alternate, deciduous to persistent, subsessile or petioled; veins pinnate. Inflorescence: cluster, cyme, raceme, panicle, or 1-flowered, axillary or terminal, bracted. Flower: generally bisexual, radial, small; hypanthium ± cup-shaped; sepals 4–5; petals (0)4–5, free; stamens 4–5, alternate petals, attached below or to rim of disk; ovary superior or ± embedded in disk, 2–5-chambered, placentas axile or basal, style generally 1, short, stigma ± head-like, 2–5-lobed. Fruit: capsule, winged achene, berry, drupe, or nutlet, often 1-chambered. Seed: generally 1 per chamber, arilled.
50 genera, 800 species: worldwide, especially southeastern Asia; some ornamental (Celastrus, Euonymus, Maytenus, Paxistima). [Zhang & Simmons 2006 Syst Bot 31:122–137] —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Brizicky 1964 J Arnold Arbor 45:206–234]

Key to Celastraceae

MORTONIA
Shrub, erect, scabrous. Leaf: alternate, persistent, ascending, leathery, entire; margin generally thicker. Inflorescence: panicle, terminal, many-flowered. Flower: parts in 5s; hypanthium obconic; petals white; disk fused to hypanthium except at top, fleshy, ± white, in age red-purple; ovary superior, narrowly ovoid, stigma lobes 5, slender, spreading. Fruit: nutlet 1, oblong-cylindric, light brown. Seed: 1, straw-colored, difficult to separate from fruit; aril 0.
5 species: southwestern United States, Mexico. (S.G. Morton, American botanist, physician, 1799–1851)

Previous taxon: Maytenus boaria
Next taxon: Mortonia utahensis

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Aug 1 2014
Citation for this treatment: [Author of taxon treatment] 2013. Mortonia, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=9805, accessed on Aug 1 2014

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