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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)

M. utahensis (Trel.) A. Nelson UTAH MORTONIA
NATIVE
Plant 3–12 dm, coarsely scabrous. Stem: twigs cream-white, in age gray. Leaf: petiole ± 0–1 mm; blade 6–16 mm, ovate to round, abaxially concave transversely, convex longitudinally, base rounded to tapered, tip rounded to acute, mucronate or not. Inflorescence: 8–65 mm, 6–23 mm wide. Flower: hypanthium 1.5–2 mm; sepals 1–2.3 mm, keeled, tips often acute, keeled; petals 2.2–3 mm, ovate. Fruit: 5–7 mm, glabrous.
Limestone slopes, canyon bottoms; 350–2100 m. n Mojave Desert; to southwestern Utah. Mar–May [Online Interchange] {CNPS list}

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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 24 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=34025, accessed on Oct 24 2014

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click for enlargement Mortonia utahensis
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2004 James M. Andre

Geographic subdivisions indicated for the distribution of Mortonia utahensis Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.