vagus: a mixed nerve that supplies the pharynx and larynx and lungs and heart and esophagus and stomach and most of the abdominal viscera
cranial nerve: any of the 12 paired nerves that originate in the brain stem
genus phlox: herbaceous to shrubby evergreen or deciduous annuals or perennials, diffuse (spreading) or caespitose (tufted or matted); from Alaska and western Canada to Mexico