Single Record
Participant Info
- Species
- Polygonum douglasii [Polygonum montanum] [Polygonum tenue var. latifolium]
- Family
- Polygonaceae
- CommonName
- Douglas’s knotweed
- Presence
- YES
- Status
- native
- EarliestDate
- 1945
- LatestDate
- 2017
- Ecosystem
- foothill, montane, subalpine
- Geobotanical
- SSawatch, SSanjuans, NCristos
- Counties
- Conejos, Costilla, Hinsdale, Mineral, Rio Grande, Saguache, Archuleta
- Passes
- Cumbres
- WildlifePreserves
- Brown Lakes
- Other Localities
- Comments
- Polygonum douglasii is a common Watershed knotweed, found in a wide range of habitats, xeric and mesic, usually open spaces such as forest openings, edges of meadows, and dry hillsides. The only record from the east side of the Valley comes from west of La Veta Pass (1957), but the species has been recorded repeatedly from the Rio Grande Cristos of New Mexico. Its USA distribution covers all states west of the Great Plains, with scattered locations around the Great Lakes. It is present in the Rio Grande drainage down to Doña Ana Co, New Mexico, but not into Texas.
- Annotation
- YES