The genus is now Hesperocyparis, but back in the olden days I learned the rough bark Arizona cypress of southeastern Arizona as Cupressus arizonica...
Lesquerella is named in honor of Leo Lesquereaux and Wikipedia reminds me that he was a “Swiss bryologist and a pioneer of American paleobotany.”...
Sweet acacia is Vachellia farnesiana (Acacia farnesiana) and is in the pea family Fabaceae. I have never seen it in habitat, though as I...