Single Record

Counties: Alamosa, Conejos, Costilla, Hinsdale, Mineral, Rio Grande, Saguache

PhotoRecords: YES Rich Haswell: Rio Grande Co, Del Norte, Rio Grande slough north of the river, 19 July2015.

Comments: If voucher identifications are correct, Lemna minor is a Basin plant extending from the Basin up into the high montane in the San Juans, but not in the Cristos. Ackerfield shows this kind of range in elevation. It was been collected from a pond 1 mile N of Alamosa in 1952, and there have a dozen or so collections since. The USA distribution shown in BONAP includes locations in every state except for Nevada, Wyoming, Alabama, Georgia, and South Carolina, with the thinnest presence in Texas and the South. In the Rio Grande drainage, it is recorded from as far down stream as Doña Ana Co of New Mexico. BUT NOTE: The latest distribution indicated by FNA omits the state of Colorado, and the latest information from John Kartesz of BONAP repeats that the "Lemna minor" reported from Colorado is instead Lemna turionifera. This is understandable if we imagine the Colorado vouchers determined as "Lemna minor" were collected before the turions developed in L. turionifera.