美人蕉與圓葉蔦蘿 (Canna species and Ipomoea quamoclit) Mary Vaux Walcott 1877 美人蕉與圓葉蔦蘿 (Canna species and Ipomoea quamoclit) by 瑪麗·沃克斯·沃爾科特, 1877, Nature, realism