The obovate or oblong, flattened, greyish-green joints have purple leaves that drop off quickly. The 10 to 15 white to reddish spines of 1 inch, extend from multiple white areoles while yellow ...

Succulent-leaved perennial with sharp spines and yellow flowers. Produces spiny, purple-red fruits. Flat, thick, low-growing plant that prefers sandy soil. Weed common to most of the United Sta...

The obovate, green joints reach up to 8 inches in length and have pale brown reflexed spines of 1 to 4 inches extending from large close set areoles, while yellow glochids cover the surface. In...

The obovate green joints are rounded at the top, reach up to 5 inches in length and have one thick spine of 1 inch extending from small upper areoles while glochids cover the surface. In summer...

The pale green joints, reach up to 5 inches in length and have 1 to 5 brown-grey spines of about 1 inch, extending from multiple brown areoles while pale yellow glochids cover the surface. In s...

The oval or elongated, thick and flat, dark green joints reach up to 6 inches in length and have slender white spines extending from prominent white areoles. In summer the large yellow or dark ...

The green joints reach up to 6 inches in length and have spines of 1 inch extending from multiple areoles while glochids cover the surface. In summer the large yellow with red center flowers ar...

Thick, erect, brushlike, with 8 or 9 grey spines reaching up to 2 inches long. The flat, grey-green joints, are oval, 2 inches long with many small warts. Small hairy areoles have reddish tufte...

The thin, ovate, glaucous, green joints reach up to 2 to 3 inches in length and have 1 or 2 brownish spines of 1 inch extending from the upper areoles while brown glochids cover the surface. In...

The shiny, deep green, pubescent joints reach up to 8 inches in length and have 1 long and 2 to 3 short yellow spines, and multiple areoles while glochids cover the surface. In summer the large...