- 3 - 4' tall
- Blooms July to September
- Flowers 1/2 - 3/4" wide, 5-petaled, 5 sepals with dark red edges, clustered at the end of stems
- Seeds in round capsules, may remain viable for 20 years
- Leaves opposite or whorled, 2 3/4 - 4 3/4" long and 1/2 - 1 1/2" wide, softly hairy beneath with small black to orange glands
- Stems erect, slightly hairy, may be flattened
There are few occurrences of this species documented in Colorado. View the known North American Distribution Map.
If you are aware of infestations that are not represented, please report your sighting. Register for an EDDMapS account, then select "Report Sightings". Please include photos with your submissions.