Sanmiguelia is a genus of fossil plants. It may be among the earliest angiosperms. It was identified by imprints of palm-shaped leaves originating from the Triassic geological period (251 to 199.6 million years ago). They were found in rocks from Colorado .
The leaves were ellipsoidal and wrinkled, up to 40 cm long and 25 cm wide, and were at the apex of a tapered or spindle-shaped stem.  According to these data, it belonged to a possible family flowering plants Sanmigueliaceae , unknown order, in class Magnoliopsida, division Tracheophyta.[source?]
- William L. Hosch ed. (2020): Sanmiguelia. Encyclopaedia Britanicanica.  London.