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: Email a link to a friend (Opens in new window) Email Share on Facebook (Opens in new window) Facebook Print (Opens in new window) Print Share on Pinterest (Opens in new window) Pinterest