Species Notes:Comment from Dave Ferguson -Associate Curator, Rio Grande Botanic Garden:
The photo of O. lindheimeri looks a bit off, but might be right. The fruits normally aren't so round, and aren't so spiny, but it otherwise looks reasonable. I'd still be a bit hesitant about the identification though. It might well be the variant that was named O. tardospina and O. subarmata which grows west from the Texas Hill Country and northern Coahuila in the mountains. It seems to be a variety or subspecies of O. lindheimeri. The thick pads and more rounded fruit fit that taxon, but the spines on the fruit are a bit unusual, maybe that is the result of growing in the California coastal climate?
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