Heterotheca grandiflora

Heterotheca grandiflora is a species of flowering plant in the daisy family known by the common name silk-grass goldenaster or telegraphweed. It is native to the southwestern United States (California, Nevada, Utah, Arizona)[2][3] and northwestern Mexico (Baja California),[4] but it can be found in other areas as an introduced species, such as Hawaii. It is often a roadside weed even where it is native.

Heterotheca grandiflora

Apparently Secure  (NatureServe)
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Asterids
Order:
Asterales
Family:
Asteraceae
Tribe:
Astereae
Genus:
Heterotheca
Species:
H. grandiflora
Binomial name
Heterotheca grandiflora
Nutt. 1840
Synonyms[1][2]
  • Heterotheca floribunda Benth.

Heterotheca grandiflora is a tall, bristly, glandular plant exceeding a meter (40 inches) in height and densely foliated in hairy to spiny toothed or lobed leaves. Leaves are smaller and more widely spaced toward the top of the stem, which is occupied by an inflorescence of bright yellow daisy-like flower heads. The disc and ray florets drop away to leave a spherical head of achenes, each with a long white pappus.[5]

Asteraceae Heterotheca grandiflora Telegraph Weed


  • Closeup of flower.
  • Closeup of flower gone to seed.
  • Field of Heterotheca grandiflora.


References
  1. The Plant List, Heterotheca grandiflora Nutt
  2. "Biota of north America Program 2014 county distribution map".
  3. Calflora taxon report, University of California, Heterotheca grandiflora Nutt.. telegraph weed, telegraphweed
  4. SEINet, Southwestern Biodiversity, Arizona chapter photos, description, distribution map
  5. "Heterotheca grandiflora in Flora of North America @ efloras.org". www.efloras.org.


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