Eastern Mojave Vegetation Flower head of Coll. No. 3252, Arnica cordifolia.  
 

 

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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 Arnica cordifolia
Photographed 10 November 2024.

Plants of the Coal Creek Canyon Study Area
Jefferson County Open Space, Colorado, USA
Asteraceae

Arnica cordifolia Hook.  Heart-Leaf Leopardbane.

Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. On a terrace, right bank of the second creek on the south side of Coal Creek Canyon, the first being that of Blue Mountain Estates, 787 m. west southwest of Coal Creek Canyon Fire Department Station 3, 14.0 km. northwest of Golden. 39.87137°N, 105.28656°W. WGS 1984 Elev. 2155 m. Open Douglas fir forest, with Acer glabrum.

Collected by permit: Jefferson County Open Space, 2024, issued: Mar 6, 2024, to: Tom Schweich.

Tom Schweich 3252. 10-Jun-2024

Coll. No. 3252, 10 June 2024, characters observed: Perennial, to 40 cm., rhizomes long and thin; Stem, simple (of 4 plants one was branched at base), arachnoid hairy; Leaves, opposite, 1-2 pairs, 64 mm. × 42 mm. wide, cordate, margin dentate (to almost serrate); Inflorescence, heads solitary; Receptacle, epaleate; Phyllaries, 1st series, 21 mm. × 3 mm. wide, green, margin chartaceous, pilose, 2nd series, very thin chartaceous; Ray flowers, fertile, #11, yellow, tube 6.5 mm. + blade 25 mm. × 9.5 mm. wide; Disc flowers, many, yellow, tube 10 mm. + lobes 1 mm.; Pappus, many, 9 mm., white, capillary; Cypsela, 6 mm., dark gray, strigose.

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Date and time this page was prepared: 12/8/2024 2:15:45 PM