Arizona rainbow hedgehog cactus is Echinocereus rigidissimus. That name hasn’t changed, but the black throated gray warbler is now Setophaga nigrescens…no longer Dendroica. Jeez, but okay, okay, I’ll make a pencil note in our Peterson and Sibley field guides. I like a field guide with checks and notes anyway. The photos are mine of a rainbow hedgehog in bloom. If you look very closely at around 4 o’clock in the shadow you can see a tiny hedgehog growing in a crack of the rock. For a picture of the black throated gray warbler check your field guide or head to…