|Eastern Prickly Pear|
This species ranges from Montana eastward to parts of the southern Great Lakes, and in the dry coastal sand dunes along the eastern seaboard from the Florida Keys to coastal Connecticut and Long Island, NY, as well as westward to New Mexico.
As is the case in other Opuntia species, the green stems of this low-growing perennial cactus are flattened, and are formed of segments. Barbed bristles are found around the surfaces of the segments, and longer spines are sometimes present. The flowers are yellow to gold in color, and are found along the margins of mature segments. The flowers are waxy and sometimes have red centers. They measure 4–6 cm across. This cactus blooms in the late spring.
The juicy and edible red fruits measure from 3–5 cm. As the fruit matures, it changes colour from green to red, and often remains on the cactus until the following spring. There are 6 to 33 small, flat, light-colored seeds in each fruit.
This plant is very intolerant of shade. It thrives in full sun and needs well-drained soil.
Some botanists treat this cactus as a variety of Opuntia compressa: hence Opuntia compressavar. humifusa, or a synonym of Opuntia compressa. Those recognizing this species treat Opuntia rafinesquii as a junior synonym.
- Speciesatrisk.gc.ca entry for Eastern Prickly Pear
- Florida's Forest Plants - Prickly pear
- Opuntia humifusa images at bioimages.vanderbilt.edu