| Specimen ID | 229675 |
| Group | Plants |
| Genus | Landoltia |
| Species | punctata |
| Common Name | dotted duckweed |
| State | IL |
| County | Alexander |
| Locality | Horseshoe Lake |
| Mapping Accuracy | Approximate |
| HUC8 Name | Cache |
| HUC8 Number | 07140108 |
| Map | |
| Collection Day | 24 |
| Collection Month | 11 |
| Collection Year | 1960 |
| Year Accuracy | Actual |
| Potential Pathway | unknown |
| Status | established |
| Reference 1 |
| Ref. Number: | 10396 |
| Author: | Daubs, E.H. |
| Date: | 1962 |
| Title: | The occurrence of Spirodela oligorrhiza in the United States. |
| Journal: | Rhodora |
| Volume: | 64 |
| Pages: | 81-85 |
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| Reference 2 |
| Ref. Number: | 10632 |
| Author: | Henry, R.D., and A.R. Scott |
| Date: | 1981 |
| Title: | Time of introduction of the alien component of the spontaneous Illinois vascular flora. |
| Journal: | The American Midland Naturalist |
| Volume: | 106 |
| Issue: | 2 |
| Pages: | 318-324 |
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| Comments | CollectorNumber: Daubs 545 |
| Record Type | Literature |
| Museum Cat Number | herb/Univ. of Illinois |
| Freshwater/Marine | Freshwater |
