Hoya undulataHoya undulata at a glance: Hoya undulata is one of the most unusual Hoyas in cultivation, known for stiff leathery leaves with strongly wavy margins and occasional domatia at the leaf base that can shelter ants in habitat. Native to lowland Kalimantan, it is an epiphytic climber that demands brighter humidity driven conditions than easier common Hoyas, but rewards that effort with a leaf shape that looks sculpted rather than simply grown. Bright