Rolf Nussbaumer / Yellow wood sorrel {Oxalis dillenii} growing in bark of Mesquite tree, Texas, USA.
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Edwin Giesbers / Spiny pest pear (Opuntia dillenii) in fruit and Hercules club / Canary Island Spurge (Euphorbia canariensis) in montane habitat, with flat tooped mountain ridge in background, Parque Rural de Teno, Te...