W.H. Earle, Saguaroland Bulletin, XXXIV:15 1980. 

Holotype 

Original Description

What is Opuntia woodburyi?

Opuntia woodburyi was originally considered to be a variety of O. basilaris due to the shape and contour of its cladodes. It is a prostrate, creeping pricklypear which grows in chains on red sandy soils in southern Utah and northern Arizona. 

O. woodburyi is octaploid. 

Details

O. woodburyi has brown glochids and long spines 2.5-5 cm on the upper end of pads. Sand accumulates from wind, sometimes causing the plants to form mounds. The claddes are bright, light-green in color, glabrous, and obovate to rhomboid in shape. Flowers are light to dark pink, about 6 cm in diameter. The fruit is dry and about 3.1 cm long and 2.2 cm wide. The seeds are lumpy but flat, and about 0.9 cm wide. 

Opuntia woodburyi is treated as a variety of O. basilaris by some botanists or even a hybrid (O. xwoodburyi). O. woodburyi is only reliably distinguishable from O. aurea by chromosome count. More sampling is needed of both.  

A photograph is included in the original description (link above). 

See Majure et al., 2015, Phytoneuron, 2015, 41.