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Helianthella microcephala (A. Gray) A. Gray  
Family: Asteraceae
purpledisk helianthella, more...Small-Head Dwarf-Sunflower
[Encelia microcephala A. Gray]
Helianthella microcephala image
Al Schneider
  • FNA
  • Resources
William A. Weber in Flora of North America (vol. 21)
Plants 20-60(-80) cm. Cauline leaves: largest proximal to mid stems; blades usually 3-nerved, linear-spatulate to oblong-spatulate, 6-25 cm, faces hispidulous to scabrellous or glabrate. Heads (3 -)5-15+ in corymbiform arrays, erect. Involucres turbinate, campanulate, or hemispheric, (8-)12-15(-20+) mm diam. Phyllaries deltate-ovate to oblong (unequal to subequal, margins ciliolate, apices obtuse). Paleae chartaceous, relatively firm. Ray florets (5-)13; laminae 8-14 mm (usually little surpassing discs). Disc corollas purple to brown. Cypselae strongly compressed, ± oblanceolate (scarcely winged, faces densely strigose); pap­pi of 2 ± subulate scales plus 0-4 shorter scales. 2n = 30. Flowering (Jul-)Aug-Sep. Gulches, ravines, hillsides, semidesert sites, pinyon-juniper associations; 1700-2800 m; Ariz., Colo., N.Mex., Utah. Helianthella microcephala grows in the Colorado Plateau province.

Helianthella microcephala
Open Interactive Map
Helianthella microcephala image
Al Schneider
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Al Schneider
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Al Schneider
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Al Schneider
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Al Schneider
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The National Science Foundation
Development supported by National Science Foundation Grants (DBI 9983132, BRC 0237418, DBI 0743827, DBI 0847966)
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