Participant Info

Species

Persicaria maculosa [Persicaria persicaria] [Polygonum persicaria] [Persicaria vulgaris]

Family

Polygonaceae

CommonName

Lady's-thumb knotweed

Presence

YES

Status

exotic

EarliestDate

1939

LatestDate

2023

Ecosystem

basin, montane, ruderal

Geobotanical

Garitas, SSanjuans, UBasin

Counties

Alamosa, Saguache

Passes

WildlifePreserves

Other Localities

Alamosa (town)

PhotoRecords

YES Rich Haswell: Rio Grande Co, Sherman Lake E of Monte Vista 13 Aug 2016

Comments

Spotted lady's-thumb, an exotic, is wide spread in the USA and might be expected more widely in the Watershed. But so far there are only four locations: by the edge of the Rio Grande (Alamosa Co); by Sherman Lake (Rio Grande Co); by La Garita Creek (Saguache Co); by a water-retension pond SW of Del Norte (Rio Grande Co); and in the Monte Vista Wildlife Refuge (iNaturalist observation 171478074, 29 June 2023). BONAP also shows Conejos Co, with no vouchers in SEINet. It has been recorded throughout the length of the Rio Grande drainage, all the way to the Gulf of Mexico.

Annotation

YES