Hoya decipulae Most Closely Resembles Hoya papaschonii.

Both Hoya decipulae and Hoya papaschonii are thin-leafed epiphytic shrubs with similarities in its flowering. The flowers however of Hoya decipulae are much larger with the distinctive cage shape. Below Hoya papaschonii on top and Hoya decipulae on the bottom: