Podranea ricasoliana is a striking evergreen semi-vining plant, with glossy leaves and numerous attractive pink flowers, renowned in the horticultural world of South Africa. On the other hand, Purple Trumpet Vine is a robust woody climbing plant without tendrils, known for its extending stems. Its stem height can reach 3 to 5 meters and it possesses long and sprawling branches, capable of growing up to 10 meters when supported by a continuous trellis. 

Reference: Kplant.biodiv.tw. Retrieved 19th October 2023, from: http://kplant.biodiv.tw/%E7%B4%AB%E8%8A%B8%E7%B1%90/%E7%B4%AB%E8%8A%B8%E7%B1%90.htm