“When I stumbled on the horse, I thought okay, so this can be my Jasper Johns flag,” the painter Susan Rothenberg (1945–2020) said in a 2005 documentary. “This can be nothing to me,” she continued, “because I don’t like horses.” Yet instead of a trademark, she had found control. Rothenberg’s silhouette horses retain their status as tender, genuine visions. The focus of “Susan Rothenerg: The Weather,” however, is not the immortalized horses, which appeared in the Obama Whitehouse. The exhibition presents paintings of many themes from Rothenberg’s personal holdings, works that show an artist firmly devoted to her material, following where it leads. —Frankie Budworth