| Common Threeseed Mercury | |
| Rhombic Three-Seeded Mercury | |
| Rhomboid Copperleaf | |
| Rhomboid Mercury | |
| Virginia Threeseed Mercury |
| Plant Habit: | Shrub |
| Life cycle: | Annual |
| Sun Requirements: | Full Shade |
| Water Preferences: | Wet Wet Mesic |
| Minimum cold hardiness: | Zone 6b -20.6 °C (-5 °F) to -17.8 °C (0 °F) |
| Maximum recommended zone: | Zone 7b |
| Flowers: | Other |
| Flower Color: | Bi-Color: orptpoadrlbCeecorsc - |
| Flower Size: | 2"-3" |
| Flower Time: | Late spring or early summer |
| Underground structures: | Rhizome |
| Uses: | Dye production Water gardens |
| Wildlife Attractant: | Hummingbirds |
| Resistances: | Fire Resistant |
| Conservation status: | Endangered (EN) |
