Native to southern India, highly prized, and the subject of legend. You’ll find Hoyas throughout eastern Asia to Australia and classified botanically in the asclepias (milkweed) family. The exact number of species is a mystery. Bailey’s Standard Cyclopedia of Horticulture estimates there are 100 species. Listed at the end of the article are over 550 recoginized species. The most common species, and the one most often seen and grown as a houseplant is Hoya carnosa and Hoya carnosa variegata.

In a sunny window the foliage is unusually decorative, and their late spring and summer flowers are highly prized. Some consider Hoya blooms among the most exquisite creations of nature, seemingly fashioned from ivory or porcelain, with glimmering centers of ruby and amethyst. The blossom of Hoya carnosa carries a delicate, elusive fragrance which is barely noticeable. The waxen ball of five-pointed, double stars, is geometrically perfect; giving the bloom an artificial look. Those experiencing Hoya carnosa for the first time are pleasantly surprised to find it is real.

Details found via : https://plantcaretoday.com/hoya-plant-care.html