| Specimen ID | 229937 |
| Group | Plants |
| Genus | Myriophyllum |
| Species | spicatum |
| Common Name | Eurasian watermilfoil |
| State | IA |
| County | Hancock |
| Locality | Crystal Lake |
| Mapping Accuracy | Accurate |
| HUC8 Name | Upper Iowa |
| HUC8 Number | 07080207 |
| HUC10 Name | West Branch Iowa River |
| HUC10 Number | 0708020701 |
| HUC12 Name | Headwaters West Branch Iowa River |
| HUC12 Number | 070802070101 |
| Map | |
| Collection Year | 1993 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker on small watercraft |
| Status | extirpated |
| Comments | Sonar whole lake in 1994 - no EWM observed. |
| Record Type | Personal communication |
| Earliest Record | state |
| Freshwater/Marine | Freshwater |
