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(Last Modified On 3/13/2013)
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(Last Modified On 3/13/2013)
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Genus
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Ouratea Aubl.
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PlaceOfPublication
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Hist. P1. Gui. Fr. 397, 1775, nom. gen. conserv.
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Description
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Trees or shrubs. Leaves alternate, persistent, simple, membranaceous or coria- ceous with the median nerve strongly prominent; stipules subulate, striate. Inflores- cences terminal or axillary, paniculate or racemiform, the flowers usually disposed in well-spaced bostryces, pedicellate. Flowers hermaphroditic with 5 unequal and imbricate sepals; petals 5, hypogynous, subequal; stamens 10, hypogynous, connivent; anthers subsessile, subulate, more or less rugose, dehiscing by oblique apical pore; receptacle thick, in fruit swollen or club-shaped; carpels 5-10, uniloculate, with the style central, filiform, the stigma undifferentiated. Fruits disposed as usually 5 druplets sessile on the swollen torus; seeds erect, exalbuminous.
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Habit
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Trees shrubs
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Distribution
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Mostly in the tropics of the New World; a few species found in Asia and Africa.
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Note
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The nomenclatural problem associated with the genus has been discussed by the author (Taxon 14: 275-277, 1965).
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Key
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a. Leaves not densely fasciculate, usually persistent on well developed branchlets. b. Leaves sessile or subsessile, somewhat fasciculate and strongly ascending on branches, 35-75 cm long. c. Leaves spatulate, deltoid and scarcely acuminate at the apex; lateral veins of the lamina rigid and not impressed above .................... 1. 0. curvata cc. Leaves obovate, rounded toward the apex, ultimately distinctly acuminate, the lateral veins arcuate and obviously impressed .....2. 0. tuerckheimii bb. Leaves petiolate. spreading, 5-30 cm long. d. Inflorescences widely pyramidal-paniculate. e. Leaves with margins finely serrate .. .......... 3. 0. insulae ee. Leaves with the margins entire .......... 4. 0. cocleensis This content downloaded on Wed, 13 Mar 2013 11:26:09 AMAll use subject to JSTOR Terms and Conditions1967] FLORA OF PANAMA (Family 119. Ochnaceae) 29 dd. Inflorescences contracted, paniculate or racemiform. f. Inflorescences 18-25 cm long. g. Leaves ca 4X longer than wide, lateral veins ca 10, 2-3.5 cm .apart, margins vaguely repand; pedicels (at least in fruit) strongly re- flexed; receptacle of fruit mostly obovate .5. 0. flexipedicellata gg. Leaves ca 3 X longer than wide, lateral veins ca 20, up to 1 cm apart, margin serrate or serrulate; pedicels not strongly deflexed; receptacle of fruit patelliform .-------------------- 6. 0. patelliformis ff. Inflorescences 3-10 cm long .------------------------7. 0. lucens aa. Leaves densely fasciculate and soon deciduous from short lateral branches .................................. ............................... 8. O. mexicana
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