Participant Info

Species

Xanthium strumarium

Family

Asteraceae

CommonName

rough cocklebur, clotbur

Presence

Yes

Status

native

EarliestDate

1875

LatestDate

2021

Ecosystem

basin

Geobotanical

UBasin

Counties

Alamosa

Passes

WildlifePreserves

Other Localities

Alamosa (town)

PhotoRecords

YES Rich Haswell: Saguache Co, Russell Lakes SWP 10 July 2016; Conejos Co, bank of the Rio Grande at Hwy 142, 28 Sept 2021

Comments

There are four collections of Xanthium strumarium from the town of Alamosa, in the floodplain of the Rio Grande (1976-1992). Also from the floodplain of the Rio Grande is a photorecord (2021) at the crossing of Hwy 142, on the Conejos Co side of the river. A 2016 photorecord from Russell Lakes and a 2019 one from the Sand Dunes (iNaturalist observation 21524257) would add Saguache to Watershed counties indicated in Ackerfield (2022) and BONAP (2022). This native cocklebur is probably more wide spread in the Watershed than these records show. In 1875 Brandegee mentions the plant as growing on the east side of the Valley. It is recorded from the great majority of counties all across the USA, and follows the Rio Grande drainage to the Gulf of Mexico.

Annotation

Yes