Begonia maculata, commonly known as the "Polka Dot Begonia" or "Angel Wing Begonia," is a cane-type plant with large, green, wing-shaped leaves adorned with silvery polka dots and deep reddish-purple undersides. 
Leaves:
The leaves are large, green, and wing-shaped, with prominent silvery-white spots (polka dots) on the upper surface and a striking deep reddish-purple or maroon underside. 
Stems:
It's a cane-type begonia, meaning it has upright, bamboo-like stems that can grow tall. 
Flowers:
It produces clusters of white or pink flowers with yellow centers on a single stem. 
Size:
The plant can reach up to 2 feet tall.