| Specimen ID | 230876 |
| Group | Plants |
| Genus | Landoltia |
| Species | punctata |
| Common Name | dotted duckweed |
| State | CA |
| County | San Diego |
| Locality | N. Twin Oaks, Valley, pond e. side N. Twin Oaks Valley Rd, 2.4 km n. of junction w/ Hwy. S-12 |
| Mapping Accuracy | Approximate |
| HUC8 Name | San Luis Rey-Escondido |
| HUC8 Number | 18070303 |
| Map | |
| Collection Day | 4 |
| Collection Month | 7 |
| Collection Year | 1983 |
| Year Accuracy | Actual |
| Potential Pathway | unknown |
| Status | established |
| Reference 1 |
| Ref. Number: | 10646 |
| Author: | Armstron, W.P. |
| Date: | 1984 |
| Title: | Noteworthy Collections, California, Spirodela punctata |
| Journal: | Madrono |
| Volume: | 31 |
| Issue: | 2 |
| Pages: | 123-124 |
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| Comments | earliest record southern CA, se. range extension of 470 km from San Joaquin River site. associates:Lemna, Wolffia and Azolla. infestation size: 1.5 ha. id: 2 or 3 roots, small ventral scale covering base of roots, brown pigment cells (dead fronds) CollectorNumber: Armstrong 1145 RSA and SD |
| Record Type | Literature |
| Museum Cat Number | herb/RSA and SD |
| Freshwater/Marine | Freshwater |
