Introduction
Opuntia gregoriana Griffiths is a synonym of O. engelmannii Engelmann. O. gregoriana-type plants have fewer spines than typical O. engelmannii plants.
Links
O. gregoriana at Tropicos
O. gregoriana at the Plant List
O. gregoriana at IPNI
![Opuntia gregoriana 7457](https://i0.wp.com/opuntiads.com/griffiths/wp-content/uploads/7457gregoriana230jp-merged1x.jpg?resize=640%2C422)