Opuntia ammophila buds are distinct with recurved tepals, and the flowers themselves are light-yellow with cream-colored stigmas. The plant is infrequently encountered in mid-Florida. Opuntia ammophila Opuntia ammophila, the devil's-tongue, is a species of prickly pear cactus in Florida. Individuals typically occur singly and do not generally form dense thickets. "O. ammophila" was once considered a variety of "O. humifusa"; however, it is a distinct species. Among their many differences, "O. ammophila" has gray-green cladodes rather than green or grass-green. "Opuntia ammophila" can grow to the height of humans, and large plants with thick trunks were encountered 100 years ago. However, now
Opuntia arenaria Opuntia arenaria Opuntia arenaria was considered a variety of "O. polyacantha" by many botanists, and is still treated that way in the Flora of North America. However, "O. arenaria" is diploid and "O. polyacantha" is tetraploid. It was described by Engelmann in 1856. "Opuntia arenaria" can grow in soil that is essentially pure sand. It has rhizomes up to 1.5 m long that give rise to above ground shoots with small cladodes that are 4-7 x 2–3 cm in size. Major spines are found in the distal areoles and are often reflexed, up to 30 mm long. Minor spines are