Leaf blade surfaces and SEM micrographs of trichomes of Curarea: A glabrous adaxial leaf blade surface of juvenile and adult leaves, C. barnebyana (Ortiz & Vargas 194) B densely pubescent adaxial leaf blade surface of juvenile and adult leaves showing whitish covering more conspicuously in juvenile leaves, C. barnebyana (Ortiz & Vargas 194) C elongate trichome with a short basal cell (white arrow) and a cylindrical terminal cell, C. crassa (Jardim et al. 609) D trichome with a moderately short terminal cell, C. cuatrecasasii (Kernan & Phillips 1147) E matted, elongate trichomes, C. gentryana (Rubio & Quelal 1503) F collapsed trichomes, C. candicans (Jansen-Jacobs et al. 1995).