Opuntia engelmannii

Opuntia engelmannii is a name for a variety of Opuntias found all over Arizona, New Mexico and Texas. This is a large padded plant, forming low bushes. There are areas in Arizona where thicklets of this Opuntia are actually dominant vegetation.
This plant is suitable for outside garden in the area where winters warm enough. It is quick growing and very resilient plant adapted to a wide range of conditions. In late spring it produces plenty of large yellow flowers, often with darker throat.
Note the difference in color in different flowers. Buds are open for two days as with most of Opuntoides, closing for the night. The first and the second day flowers are often show significant difference in color shade.