Participant Info

Species

Dieteria canescens [Machaeranthera canescens] [Machaeranthera viscosa] [Machaeranthera linearis] [Aster canescens] etc.

Family

Asteraceae

CommonName

hoary false tansyaster, sand daisy

Presence

YES

Status

native

EarliestDate

1930

LatestDate

2023

Ecosystem

basin, shrubland, foothill, montane, ruderal, urban

Geobotanical

SSawatch, Garitas, SSanjuans, NCristos, UBasin, LBasin

Counties

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

Passes

La Veta, Medano

WildlifePreserves

Baca, Great Sand Dunes, Russell Lakes

Other Localities

Alamosa (town), Del Norte

PhotoRecords

YES Rich Haswell: Rio Grande Co, by railroad tracks 2 miles E of Del Norte 20 Aug 2020

Comments

Dieteria canescens is generally found at lower elevations than D. bigelovii, but in the Watershed the distributions do overlap. This means that in the Watershed the two species may hybridize (USDA), making ordinary determination inconclusive with some specimens. The safest character is leaf width (D. canescens 5 mm or wider, D. bigelovii 5 mm or less). D. canescens is recorded from both sides of the Valley, from the Basin up into the montane. It is found in every USA state west of the Great Plains, and follows the Rio Grande drainage through New Mexico to far west Texas.

Annotation