| Currently Accepted Name: | Ambrosia trifida Species L. |
| Locality: | United States. Kentucky. Boyle: upper reaches of Spears Creek tributary of Herrington Lake (impoundment of Dix River); accessed by boat; ca. 4.5 mi NE of Danville |
| Habitat: | second growth deciduous woods on steep slopes with limestone outcrops and ledges |
| Collector: | Timothy J. Weckman 5709
with Judith E. Weckman |