I was sort of right, but mainly wrong about poison ivy’s Latinized name. The species found in Arizona is Toxicodendron rydbergii, formerly Rhus radicans...
Lesquerella is named in honor of Leo Lesquereaux and Wikipedia reminds me that he was a “Swiss bryologist and a pioneer of American paleobotany.”...
Solanaceae is the nightshade family and according to my Hortus Third: A Concise Dictionary of Plants Cultivated in the United States and Canada, there...