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(Last Modified On 1/30/2013)
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(Last Modified On 1/30/2013)
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Genus
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MORTONIODENDRON Standley & Steyerm.
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PlaceOfPublication
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Field Mus. Nat. Hist., Bot. Ser. 17: 411. 1938.
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Synonym
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Orthandra Burret, Notizbl. Bot. Gart. Mus. Berlin 15: 13. 1940.
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Description
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Shrubs or small to tall trees, the trunk sometimes buttressed, the hairs usually stellate, sometimes simple. Leaves alternate, petiolate, stipulate, the stipules very small and caducous, the blade entire, asymmetrical at the base, penninerved. Inflorescences terminal or axillary, cymose-paniculiform, the bracts very small. Flowers hermaphrodite, actinomorphous, pedicellate, (3-)4- or 5-merous; calyx valvate, the sepals (3-)4-5, free, thick, fleshy, pubescent without, glabrous within; petals 4-5 or absent, free, valvate, somewhat shorter than the sepals; stamens numerous, all fertile, grouped into 4-5 phalanges opposite the petals, the filaments of each phalanx shortly connate at the base; anthers oblong, mucronate at the apex, 2-thecate, introrse, basifixus, erect, longitudinally dehiscent; ovary superior, sessile, (3-)4- or 5-celled, the cells many-ovulate (4-5 ovules in each cell?); style simple; stigma undivided. Capsules loculicidally dehiscent, (3-)4- or 5-loculate, each cell 1- to 3-seeded; seeds pendulous, arillate, the aril fleshy; albumen copious, carnose; cotyledons flat, foliaceous.
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Habit
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Shrubs trees
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Distribution
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A genus of seven species confined to tropical Central America.
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Note
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Certain species are still imperfectly known, only the flowers being described or only the fruits, and some species may perhaps be reduced later to synonymy. Two specie, (one only known in fruit) occur in Panama. A single collection, lacking flowers, may represent however a third species.
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Key
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a. Tall tree; hairs stellate; branches minutely puberulous; blade of the leaves elliptic to oblong-elliptic, subcoriaceous; capsule ca. 4 cm. long and broad .... 1. M. ANISOPHYLLUM aa. Shrub; hairs mostly simple; young branches long-hirsute; blade of the leaves narrowly oblong, membranous; capsule ca. 2 cm. long and 2.5 cm. broad ..... ....I.. ..2. M. HIRSUTUM
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