| Specimen ID | 261696 |
| Group | Plants |
| Genus | Juncus |
| Species | compressus |
| Common Name | roundfruit rush |
| State | IL |
| County | Cook |
| Locality | Lake Calumet Area: South of 103rd street and just E of Stony Island extension at approx. 105th |
| Mapping Accuracy | Accurate |
| HUC8 Name | Little Calumet-Galien |
| HUC8 Number | 04040001 |
| HUC10 Name | Calumet River-Frontal Lake Michigan |
| HUC10 Number | 0404000106 |
| HUC12 Name | Calumet River-Frontal Lake Michigan |
| HUC12 Number | 040400010606 |
| Map | |
| Collection Day | 8 |
| Collection Month | 7 |
| Collection Year | 1982 |
| Year Accuracy | Actual |
| Potential Pathway | dispersed |
| Status | established |
| Comments | Cataloged at the Morton Arboretum |
| Record Type | Specimen |
| Museum Cat Number | 73876 |
| Freshwater/Marine | Freshwater |
