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7 April 2011 Three New Costa Rican Species of Calathea (Marantaceae) from Montane Wet Forests
Helen Kennedy
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Three species of Calathea G. Mey. in Calathea sect. Calathea (Marantaceae) are described as new from montane wet forest habitats in Costa Rica: C. recurvata H. Kenn., C. tarrazuensis H. Kenn., and C. verruculosa H. Kenn. These are found in montane wet, montane rainforest, or cloud forest habitats at mid to higher elevations from 800 to 1500 m. All three taxa are endemic to Costa Rica. Calathea recurvata differs from related distichous-bracted species by the close vein spacing (30 to 35 lateral veins per 3 cm) of the leaf, pale whitish green to yellowish green bracts with recurved apical margins, claviculate bracteoles, yellow or pink corolla lobes, and yellow or pink-purple staminodes. Calathea verruculosa is distinguished by the shiny dark green ovate leaf, verruculose petioles and peduncles, stiff lime-green bracts with apically recurved margins, claviculate bracteoles, and yellow corolla and staminodes. Calathea tarrazuensis is distinguished by the narrowly ovate-elliptic leaf with length:width ratios of 2.13–4.8:1 and an acuminate-attenuate apex, the glabrous pulvinus, relatively long peduncles (44–111 cm), the elliptic olive-green bracts with the uppermost bract incoiled on itself not subtending flowers, the apically flattened, slightly thickened bracteoles, and the cream-white flowers.

Helen Kennedy "Three New Costa Rican Species of Calathea (Marantaceae) from Montane Wet Forests," Novon: A Journal for Botanical Nomenclature 21(1), 49-57, (7 April 2011).
Published: 7 April 2011

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