As nouns the difference between flower and desmodium

is that flower is a colorful, conspicuous structure associated with angiosperms, frequently scented and attracting various insects, and which may or may not be used for sexual reproduction or flower can be something that flows, such as a river while desmodium is any member of the genus of the flowering plant family fabaceae, containing mostly inconspicuous legumes but some with bright or large flowers.

As a verb flower

is to put forth blooms.