The shape of the leaves is not the same. The leaves of Rhododendron are oval or obovate, about 1.5-5cm in length and 0.5-3cm in width. Rough hairs are sparsely distributed on the top of the leaves and dense brown hairs are growing below.
The shape of the leaves is oval or oval, relatively larger, about 5-10 cm in length, very smooth surface, no hair distribution, back in the seedling stage sparse distribution of short pubescence.
Rhododendron blooms from April to May. The flowers are bright red, rose, white, dark red, apricot red, snow green, etc. the flowers are very gorgeous. The Corolla is in the shape of a wide funnel.
The flowering period of Bougainvillea is from June to December. The flowers are white, red and pink. The shape of a single petal is a triangle.
The former is a capsule, oval shape, about 1 cm long, with rough hair, mature in October or so.
The latter rarely produces the actual fruit, its achene shape is pentagonal, the outside will be surrounded by bracts.
