This 2020 photo provided by Tanisha Williams shows her in Lewisburg, Pa. Williams, a botanist at Bucknell University, knows exactly which plants she's looking for. But after being questioned by strangers in public parks, Williams, who is Black, has started carrying her field guides with her. "I've been quizzed by random strangers," she said. "Now I bring my wildflower books and botanical field guides, trying to look like a scientist. It's for other people. I wouldn't otherwise lug these books."