The grayish-green or green, oval or elongated, flattened joints, reach up to 6 inches in length and have 1 or 2 yellow spines about 1 inch, extending from multiple brownish areoles while short ...

This fleshy pad-forming green cactus has golden brown bristled tufts guarding its body. In summer the brilliant orange, gold or dark red flowers are borne singly on the edge of the pads and the...

Heavily covered with long, thick, white spines the cylindrical green stem grows upright to 19 feet. In summer the bell-shaped, large orange-yellow flowers are borne singly on the stem tips and ...

The oval, green, lightly pubescent, spiny joints, reach up to 8 inches in length and are covered in spines extending from white areoles with yellow glochids. In summer the large deep yellow flo...

The dull green joints are cylindrical reaching up to 4 inches in length. They are covered with warts and can drop off easily. The few aeroles have glochids of yellow with 3 to 5 yellow, pointy,...

The thick greyish green, warty, obovate joints with flattened tops reach up to 1 inch in length and have 1 to 3 yellow-white spines of 1 inch extending from the upper small greyish areoles whil...

The thick, pale green, oval or rounded joints reach up to 5 inches in length and have 2 to 4, thick and white, yellow tipped spines extending from areoles while glochids cover the surface. In s...

The oval or cylindrical, flattened, whitish-green,smooth joints reach up to 3 inches in length and have 5 to 8 greyish brown tipped spines of 1 inch extending from multiple small, white areoles...

The oval, deep green, hairy joints reach up to 6 inches in length and have none to only 1 or 2 yellow spines of 1 inch extending from multiple reddish areoles while yellowish glochids cover the...

The deep green, branching, slender spreading cactus has cylindrical, slightly hairy joints extending to 5 inches. The reddish spines increase in number to 6. In summer the bell-shaped, large fl...