Thin-leaved Coneflower Posted on September 27, 2012 by Axie Related to Black-eyed Susan (both a kind of coneflower), but generally with smaller flower heads. Composite family. Native. Thin-leaved Coneflower (Rudbeckia triloba) Share this: Click to email a link to a friend (Opens in new window) Email Click to share on Facebook (Opens in new window) Facebook Click to print (Opens in new window) Print Click to share on Pinterest (Opens in new window) Pinterest