Eastern Mojave Vegetation Coll. No. 3465, Erigeron subtrinervis.  
 

 

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If you have a question or a comment about this photograph you may write to me at: tomas@schweich.com I sometimes post interesting questions in my FAQ, but I never disclose your full name or address. 		  Asteraceae, Erigeron subtrinervis
Photographed 7 January 2026.

Plants of Colorado
East Slope of Tarryall Mountains, Jefferson County
Asteraceae

Erigeron subtrinervis Rydb. ex Porter & Britton.  Threenerve Daisy.

North Twin Creek, Jefferson County, Colorado. In a forest glade where two branches join North Twin Creek, about 610 m. northwest of the crossing of North Twin Creek by F. R. 211, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.7 km. southwest of Deckers. 39.21144°N, 105.3508°W. WGS 1984 Elev. 2451 m. Small patch in mature Douglas fir and ponderosa pine forest, with Achillea millefolium, Cirsium arvense, Erigeron speciosus, Gaillardia aristata, Monarda fistulosa, Verbascum thapsus, and Bromus porteri. This area mapped as unburned within the perimeter of the Hayman Fire (2002).

Collected by permit: Pike San Isabel National Forest, 2025, issued: Mar 26, 2025, to: Tom Schweich.

Tom Schweich 3465. 21-Jul-2025

Coll. No. 3465 21 July 2025, characters observed: Perennial, to 40 cm.; Stem strigose, distally stipitate-glandular; Leaves, basal withered, cauline, alternate, sessile, bases auriculate, 56 mm. × 16 mm. wide, length 3.5× width, strigose, eglandular, margins ciliate, tips acute, not spinulose; Involucre, 5 mm. × 10 mm. wide; Phyllaries, in 3 series, ±equal, 5 mm. × 0.8 mm. wide, outer green, inner chartaceous, outer hairy and minutely stipitate glandular; Receptacle, epaleate; Rays, tube 3 mm. + blade 8 mm. × 0.8 mm. wide, blue; Disk flowers, many, tube 3 mm. + lobes 0.3 mm., yellow; Pappus, 2 series, outer low crown 0.2 mm., inner bristles 2.5 mm.;

Other photos about Species - Asteraceae or Erigeron subtrinervis.

 

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Date and time this page was prepared: 8/1/2026 3:18:54 PM