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Heterotheca fulcrata var. amplifolia

Heterotheca fulcrata var. amplifolia (Rydb.) Semple  
Family: Asteraceae
rockyscree false goldenaster
[Chrysopsis amplifolia Rydb., moreChrysopsis caudata Rydb., Chrysopsis nitidula Woot. & Standl.]
Heterotheca fulcrata var. amplifolia image
  • FNA
  • Resources
John C. Semple in Flora of North America (vol. 20)
Stems moderately to densely short-strigose, eglandular or nearly so. Distal cauline leaf blades ovate to lanceolate, 17-40 × 5-15 mm, margins with few long-hispido-strigose cilia, faces moderately to densely short-strigose (small leaves sometimes nearly white), eglandular or sparsely stipitate-glandular. Subtending bracts ovate, usually large (6-17 × 1.5-5.5 mm), leaflike, well differentiated (sometimes densely strigose when small). Involucres 6.4-10 mm. Phyllaries lanceolate to triangular-lanceolate, faces moderately strigose, usually eglandular. Ray laminae 8.5-14(-16) mm. Cypsela faces moderately strigose. 2n = 18, 36.

Flowering (Jun-)July-Sep(-Oct). Dry gravelly soils, coarse granitic soils, disintegrated granite slopes, high rocky summits, dry grasslands with sagebrush, roadsides, transition zone, Ponderosa pine-oak associations, pinyon-juniper zone at edge of Upper Sonoran Desert, mid to higher montane zone; 1300-3500 m; Ariz., Colo., N.Mex., Utah, Wyo.

Variety amplifolia is similar in most respects to var. fulcrata, but the leaf indument is usually densely short-strigose (50-200 hairs/mm 2 ) with few or no glands. Some plants maintain the proximal leaf shape well up the stem, only the few distalmost leaves becoming narrowly ovate-lanceolate; those are similar to Heterotheca villosa var. pedunculata. In southern Utah and eastern Arizona, small-leaved plants may be similar to H. zionensis due to the density of leaf hairs, but in that area the latter typically have densely stipitate-glandular phyllaries, moderately stipitate-glandular distal leaves, and no large bracts subtending the heads.

Heterotheca fulcrata var. amplifolia
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Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
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Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
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Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
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Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
Heterotheca fulcrata var. amplifolia image
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