Columbia Prickly Pear bloom underway. Genus Opuntia. Your choice for species: polyacantha, erinacea, columbiana or Ã. http://t.co/xltu67kFil

— Five Acre Geographic (@5AcreGeographic) 2015.6.16

Texas Native Plant Lab / Dallas Arboretum Today's buds and new cladodes: Opuntia polyacantha 'Citrus Punch … https://t.co/vbwEF6T3Ye

— Dustin Miller (@zoopunkwild) 2016.5.13

Opuntia polyacantha http://t.co/VW96scvV5D

— CACTUS COLINDRESES (@asonzzz) 2015.9.3

All members of the Opuntioideae have glochids: numerous very small spines that are deciduous Opuntia polyacantha. http://t.co/Xd257jKlRW

— javon willingham (@JavonWillingham) 2015.5.12

Photo: Opuntia polyacantha / Plains Prickly Pear Dryland Mesa, Denver Botanic Gardens http://t.co/sCfQFskhnU

— Dustin Miller (@zoopunkwild) 2014.11.29

Photoset: Opuntia polyacantha sp. / Inside out Dryland Mesa, Denver Botanic Gardens This hybrid’s blooms... http://t.co/qYN0W5M20Y

— Dustin Miller (@zoopunkwild) 2014.7.4

First cactus flower of the season! Opuntia polyacantha, a hardy cactus that grows in the ground year… http://t.co/IzHNGp6b0q

— Gayla Trail (@yougrowgirl) 2014.6.20

"Bad Hair Day!" MOJAVE PRICKLY-PEAR (opuntia polyacantha) @ UC Berkeley Botanical Gardens http://t.co/EpUDwDUf

— B. Anderson (@brandingo) 2013.2.12

@JA_fr oui que des cactus d'extérieur résistant -10 à -20°, dernier acquisition opuntia polyacantha 'cheyenne'

— jardin-nature (@jeffjardin) 2012.11.25

Off to photograph Opuntia polyacantha, the prickly pear cactus. The blossoms are just coming out.

— Ken Oakes (@Ken_Oakes) 2010.6.21

Two Knobby Tires: Plains Prickly Pear Cactus (Opuntia polyacantha) http://tinyurl.com/6qnetl

— Rob Miller (@rjmiller) 2008.12.9

Opuntia polyacantha ×macrorhiza and Viola cornuta hybrid ... - #garden #gardens #gardening https://t.co/ed6jnABVKE https://t.co/Ef1f21sXBS

— Gardening Joys (@GardeningJoys) 2016.6.4

Texas Native Plant Lab / Dallas Arboretum First bloom on our new cuttings: Opuntia polyacantha... https://t.co/sdyUVkJvwI

— Dustin Miller (@zoopunkwild) 2016.5.24

Opuntia polyacantha 'Rhodantha Richter' http://t.co/9wCU2Exr18

— jardin-nature (@jeffjardin) 2013.5.20

Photoset: The Opuntia rhodantha hybrid ‘Grand Mesa Peach’ and Opuntia polyacantha 'Taylor’s Red’ cuttings... http://t.co/sNyhp9YVVk

— Dustin Miller (@zoopunkwild) 2015.4.17