I gave one of my famous Hoya imperialis cuttings to Julie Kennedy from the UK a number of years ago.  She has just produced the most amazing group of flowers with that plant which I have ever seen.  Look at the coronas and the corolla tips.  There are are flowers with 4,5,6, and 7 tips!!!! Thanks to Julie for the photo and allowing me to show it off here – just unbelievable!!

Photo courtesy of Julie Kennedy