Symphyotrichum spathulatum (Lindl.) G.L.Nesom, Phytologia 77: 291 (1995) (syn: Aster spathulatus Lindl.);
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Subarctic America to Mexico (Baja California Norte): Alberta, British Columbia, California, Colorado, Idaho, Mexico Northwest, Montana, Nevada, New Mexico, Oregon, Utah, Washington, Wyoming as per POWO;
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Yosemite National Park, USA, August 2024 :: Aster for ID :: ARK2024-006: 4 high res. images.
This was clicked at Tuolumne grasslands in the Yosemite National Park, USA in August 2024.
Requested to please ID.
ID looks OK
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References:
POWO
https://en.wikipedia.org/wiki/Symphyotrichum_spathulatum
https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=80300
https://burkeherbarium.org/Symphyotrichum%20spathulatum