Goldberg, Loretta. “Patterns of Nectar Production and Composition, and Morphology of Floral Nectaries in <i>Helicteres guazumifolia</i> and <i>Helicteres baruensis</i> (Sterculiaceae): Two Sympatric Species from the Costa Rican Tropical Dry Forest”. Revista de Biología Tropical 57, no. S1 (November 1, 2009): 161–177. Accessed May 19, 2024. https://www.revistas.ucr.ac.cr/index.php/rbt/article/view/21294.