Opuntia robusta, or wheel cactus, or what I killed on the weekend. https://t.co/Q3JPlN3DxV http://t.co/brmu1LjXH6

— Kate Eddy (@kate_m_eddy) 2015.7.20

Opuntia robusta #boycethompsonarboretum #Arizona #sonora #desert #july #plants @ Boyce Thompson… https://t.co/XpXkLJxJNC

— Alandon (@AlandonJoe) 2015.7.16

Opuntia Robusta #botanicalgarden #pisa #sketch #drawing #watercolour #urbansketchers #fountainpen… http://t.co/hcsSPsWLPd

— Dario Grillotti (@DarioGrillotti) 2014.7.17