Participant Info

Species

Myriophyllum sibiricum [Myriophyllum exalbescens] [Myriophyllum spicatum subsp. exalbescens]

Family

Haloragaceae

CommonName

shortspike water-milfoil

Presence

YES

Status

native

EarliestDate

1896

LatestDate

2021

Ecosystem

aquatic, basin, montane, ruderal

Geobotanical

UBasin

Counties

Alamosa, Conejos, Hinsdale, Rio Grande, Saguache

Passes

WildlifePreserves

Great Sand Dunes

Other Localities

Alamosa (town)

PhotoRecords

YES Rich Haswell: Conejos Co, The Rio Grande, in running water by the west bank where Hwy 128 crosses 28 July 2021; Alamosa Co, Blanca Wetlands Wildlife Preserve, edge of pond 13 Sept 2018

Comments

In the Watershed shortspike watermilfoil is occasionally collected from back-waters of rivers and ponds (natural and constructed). For instance, in 1986 Hobey Dixon collected it from the pond in Carroll Park in the town of Alamosa. The range in elevation of Myriophyllum sibiricum is substantial, from the Basin to small lakes in the south San Juans. The only record from the Cristos is fromt he Great Sand Dunes NPP (see Great Sand Dunes Plant Species 2005). The earliest record (1896) and latest record (2021) were from the waters of the Rio Grande—the last from the main channel in observable current. The plant follows the Rio Grande into New Mexico at least as far as Española (Heil coll, 2008). It is found in all USA states except for Texas and the South.

Annotation