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(Last Modified On 5/29/2013)
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(Last Modified On 5/29/2013)
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Genus
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Coutoubea Aubl.
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PlaceOfPublication
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Hist. P1. Guiane Fr. 1: 72. 1775.
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Description
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Herbs, rarely trailing, erect, annual or perennial (?), simple to branched, the branches usually strongly ascending, terete. Leaves cauline, opposite or rarely ternate, the lamina lanceolate, oblong-lanceolate to oblanceolate, sessile, becoming amplexicaul, acute to long-acute at the apex, membranous to coria- ceous. Inflorescences terminal or axillary, spicate or racemose, dense to long- interrupted, many-flowered. Flowers 4 ( -5) -merous, small, sessile to shortly pedicellate; calyx campanulate, deeply lobed, the lobes lanceolate-ovate, scarious- marginate; corolla white, often tinged with blue or purple, the tube short-cylin- dric, the lobes lanceolate to lanceolate-ovate, spreading; stamens inserted near the apex of the tube, the filaments filiform, spreading at the base, the anthers oblong, erect, bifid; ovary narrowly ovoid, ovary 1-locular, the placenta strongly intruding, the style filiform, the stigma bilamellate, the lobes oblong, flattened. Capsules surrounded by the marcescent calyx and/or corolla, ovoid-ellipsoid, septicidally 2-valvate; seeds small, numerous, globose, foveolate, appearing re- ticulate. Pollen grains united in tetrahedral tetrads, 55-64 ,u; single grains 3-
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Habit
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Herbs
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Description
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colporate (3-colpate, 3-porate), the concurrent colpi of two contiguous grains ca. 18 x 16 microns, the ora usually not confluent, the colpus membrane granulose, the diameter of apocolpia 22-25 microns; exine 4-6 microns thick at the distal poles, decreasing in thickness towards equator; sexine thicker than nexine, reticulate, heterobrochate, the lumina (0.5-) 1-5 micronsin diameter, the muri 0.5-1 microns wide; nexine usually smooth (Coutoubea spicata).
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Distribution
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A small genus of perhaps 5 species primarily of South America, but with one species extending into Central America to extreme southern Mexico.
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