| 1. | a hawkweed, Hieracium venosum, of eastern North America, whose leaves and root are thought to possess medicinal properties. |
| 2. | a carrotlike weed, Daucus pusillus, of southern and western North America. |
| 3. | any of certain other plants, as an umbelliferous plant, Eryngium aquaticum. |
| 4. | rattlesnake plantain. |
| rattlesnake weed n. A North American plant (Hieracium venosum) having basal leaves with reddish-purple veins and yellow flower heads borne in open corymbose panicles. |