Helianthus gracilentus

Helianthus gracilentus
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Helianthus
Species:
H. gracilentus
Binomial name
Helianthus gracilentus

Helianthus gracilentus is a species of sunflower known by the common name slender sunflower.[1] It is native to central and southern California (from Napa County to San Diego County)[1] and Baja California,[2] where it is a member of the dry wildfire-prone chaparral ecosystem, as well as woodland ecosystems.[3]

Helianthus gracilentus is a perennial herb growing from a thick taproot to heights anywhere between one half and two meters (20-60 inches). The lance-shaped, pointed leaves are smooth-edged or slightly toothed and up to about 11 centimeters (4.4 inches) long. The long, slender stems and foliage are covered in rough hairs. The inflorescence bears flower heads with an array of short, hairy phyllaries behind a thick center of yellow to red-brown disc florets. The golden ray florets around the edge are one to three centimeters (0.4-1.2 inches) long.[2] It tends to flower from late spring through fall.[4]

References

  1. ^ a b Calflora taxon report, University of California, Helianthus gracilentus A. Gray, slender sunflower
  2. ^ a b Flora of North America, Helianthus gracilentus A. Gray, 1876. Slender sunflower
  3. ^ "Helianthus gracilentus". ucjeps.berkeley.edu. Retrieved 2024-07-31.
  4. ^ "Flora of North America north of Mexico: v.1: Introduction; v.2: Pteridophytes and gymnosperms". Choice Reviews Online. 31 (07): 31–3547-31-3547. 1994-03-01. doi:10.5860/choice.31-3547. ISSN 0009-4978.


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