The Oldham rhododendron, the Nan-Au azalea (Rhododendron breviperulatum) and the Taiwan rhododendron (Rhododendron ellipticum) flower from the plains up to 1-2000m, where they give way to Rhododendron hyperythrum, the Yushan rhododendron and the yellow Kawakami rhododendron (Rhododendron kawakamii), which can grow at up to 3000m.
金毛杜鵑、南澳杜鵑、西施花（阿里山杜鵑）一路由平野開放至一、二千公尺後，停下腳步，舞台留給生長可達三千多公尺的南湖杜鵑、玉山杜鵑、紅毛杜鵑。