Global Menu

  • Neon Science
  • Data Portal
  • Biorepository
  • NSF NEON | Open Data to Understand our Ecosystems
  • Biorepository Data Portal

  • Search
    • Sample search
    • Map search
    • Dynamic Checklist
    • Taxonomy Explorer
  • Images
    • Image Browser
    • Image Search
  • Checklists
    • Research Sites - Invertebrates
    • Research Sites - Plants
    • Research Sites - Vertebrates
  • Sample Use
    • Sample Use Policy
    • Sample Request
  • Additional Information
    • About NEON
    • NEON Data Portal
    • Data Usage Policy
    • ASU Biocollections
    • About Symbiota
Login New Account Sitemap
Helianthus niveus subsp. tephrodes (A. Gray) Heiser  
Family: Asteraceae
Algodones sunflower
[Helianthus tephrodes A. Gray]
Images
not available
  • FNA
  • Web Links
Edward E. Schilling in Flora of North America (vol. 21)
Annuals or perennials, 50-150 cm (taproots stout). Stems erect or decumbent, sericeo-villous (hairs white). Leaves mostly cauline; mostly alternate; petioles 1.5-3.5 cm; blades deltate or deltate-ovate, 3-7 × 2-4 cm, bases cuneate, margins entire or serrulate, abaxial faces densely sericeous, gland-dotted. Heads 1-3. Peduncles 4-17 cm. Involucres hemispheric, 8-28 mm diam. Phyllaries 18-21, lanceolate, 8-10 × 1-3.5 mm, apices shortly attenuate, abaxial faces densely white-canescent. Paleae 8-11 mm, subentire to 3-toothed. Ray florets 10-13; laminae 16-25 mm. Disc florets 50+; corollas 4.5-6 mm, lobes reddish; anthers brownish red, appendages reddish (style branches reddish). Cypselae 4-8 mm, ± villous; pappi of 2(-3) lanceolate scales 1.5-3 mm plus 2-4 obtuse scales 0.5-1 mm. 2n = 34. Flowering fall-spring. Sand hills; of conservation concern; 50-300 m; Ariz., Calif.; Mexico (Sonora). Subspecies tephrodes differs from subsp. niveus, which is not known to occur north of Mexico, by having less densely hairy phyllaries and generally broader leaves (larger leaves more than 3 cm broad). Both differ from H. petiolaris subsp. canescens (H. niveus subsp. canescens) by lacking the conspicuous white-villous tufts ('beard') of the median cusp of the paleae in the center of the head that characterize H. petiolaris.

Subspecies tephrodes is in the Center for Plant Conservation´s National Collection of Endangered Plants.

  • BOLD Systems - Barcode of Life Data Systems
  • Encyclopedia of Life
  • Flora of North America
  • Google Images
  • Google Search Engine
  • International Plant Names Index
  • NCBI - National Center for Biotechnology Information
  • USDA PLANTS Database
  • W3Tropicos
Helianthus niveus subsp. tephrodes
Open Interactive Map
Click to Display
0 Total Images
NSF NEON | Open Data to Understand our Ecosystems The National Ecological Observatory Network is a major facility fully funded by the National Science Foundation. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the National Science Foundation.