Opuntia microdasys (bunny ears), closeup of glochids. These are really nasty if you brush up against them but, from afar, are fairly attractive. This one is growing in the back yard. For you non-cacti growers, Opuntia is the genus that includes prickly pears. Glochids are, as you can see, little tufts of spines in the areoles of the cactus pad.
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