A site about growing Hoyas in the Northeastern United States
Hoya hahniae and Hoya rosarioae
Both flowers are pink, but the much pinker Hoya hahniae makes Hoya rosarioae look orange. By the way, I finally had a chance to smell Hoya rosarioae without a cold, and I can say that it does indeed smell of roses!
Pink and Pinker -Hoya hahniae on the Left and Hoya rosarioae on the Right.