| Special Geographical Unit: | Black Creek Ravines Conservation Area |
| Verbatim Directions to Locality: | Black Creek Ravines Conservation Area (N of Rte 218, E of Green Rd), ca. 1 air mi SE of Middleburg. |
| Township: | 5S |
| Range: | 25E |
| Section: | 18 |
| Habitat: | in moist sandy loam of powerline corridor in south-central part of area, growing with R. nuttallii (the two somewhat separated phenologically). |
| Local Abundance Observations: | frequent. |
| Non digital information?: | N |