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Erigeron subtrinervis (Three-nerved Fleabane, Three-nerved Daisy) Asteraceae (Sunflower Family) Montane,
subalpine. Meadows. Summer. Erigeron subtrinervis is almost indistinguishable from Erigeron speciosus, and, in fact, Welsh (A Utah Flora) considers the taxon to be just a variety of E. speciosus. The Flora of North America and John Kartesz, the ultimate authority for plant names on this web site, consider them each at the species level. Weber (Colorado Flora) lists them as separate species but says, that E. subtrinervis "may simply be a race of" E. speciosus. After this species was named and described Erigeron glabellum by Asa Gray in 1863 from a specimen collected by Hall and Harbour in Colorado in 1862, it was renamed and described by Rydberg in 1894 . "Subtrinervis" means "weakly 3-nerved". |
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Erigeron subtrinervis (Three-nerved Fleabane, Three-nerved Daisy) Montane,
subalpine. Meadows. Summer. |
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Erigeron subtrinervis (Three-nerved Fleabane, Three-nerved Daisy) Montane,
subalpine. Meadows. Summer. Both E. subtrinervis and E. speciosus have hairs along the leaf margins, but notice that the surface of E. subtrinervis leaves (at least those at mid and upper stem level) has hairs. Also notice the hairy stem. As noted above, these latter two characteristics help to separate E. subtrinervis from E. speciosus. |
Range map © John Kartesz,
County Color Key
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Range map for Erigeron subtrinervis |