Hoya belongs to the Apocynaceae family and is native to India and southern China.
The 'Curtisii' variety has rounded, pointed leaves, with a unique "teardrop" shape, dark green with silvery variegations.
What makes Hoyas unique are also their inflorescences, with flowers described as "waxy," very fragrant, and with incredible colors. The most important factor for encouraging flowering is light. Hoyas indeed require good indirect exposure.
They prefer a well-draining substrate.