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Summary A new species ofTriolena,endemic to Colón Province, Panama, is described and illustrated. The specimens of this taxon were previously identified asTriolena lanceolata, but closer inspection has shown them to be morphologically and geographically distinct.Triolena anisophyllaK.Samra & Michelang. grows on rocks and tree trunks along rivers in Colón Province. This species is distinguishable by its strongly anisophyllous leaves and unique trichomes on the adaxial surface of the leaves. A complete description, distribution map, preliminary conservation assessment, taxonomic notes, and regional key are provided.more » « less
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Samra, Kate_E; Michelangeli, Fabián_A; Lucas, Eve_J (, Biotropica)ABSTRACT Anisophylly is a peculiar leaf trait in some opposite‐leaved taxa where opposing leaves are distinctly unequal. This study uses an expert‐curated specimen dataset to explore relationships of canopy cover and climate with the presence and intraspecific variation of anisophylly in the genusTriolena.Canopy and climate conditions are investigated between species and within a single species through beta regression models. No relationship was found between canopy cover and anisophylly. However, anisophylly is associated with conditions of high precipitation and high isothermality, which is evident acrossTriolenaand within a single species. In addition, partitioned ecoregion analyses illustrate that different types of anisophyllous leaf states occur in distinct ranges of precipitation and isothermality. Results suggest that anisophylly is associated with climate inTriolena.more » « less
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