Excuse me, what flower has roots and looks like a cactus with thorns and leaves? Will it bloom?

Pachypodium Saunders II is a genus of Apocynaceae, which is native to natal province and Zimbabwe. Baimacheng is a fleshy and prickly tree with bottle-shaped trunk, lateral branches and gray skin. The leaves are oval in width, about 6.0-6.5 cm long and 3.0-3.5 cm wide. There are short hairs on the leaf margin, 2-3 flowers in a group, and the flowers are white or light red. There are red stripes in the middle of the petals. The flowers are strange and look like windmills. It blooms every autumn, which is very charming and worth collecting by lovers.