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Helianthus praecox

From Wikipedia, the free encyclopedia

Helianthus praecox
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Helianthus
Species:
H. praecox
Binomial name
Helianthus praecox
Synonyms[1]
Synonymy
  • Helianthus cucumerifolius var. praecox (Engelm. & A.Gray) A.Gray
  • Helianthus debilis subsp. praecox (Engelm. & A.Gray) Heiser
  • Helianthus debilis subsp. hirtus Heiser, syn of subsp. hirtus
  • Helianthus debilis subsp. runyonii Heiser, syn of subsp. runyonii
  • Helianthus praecox var. runyonii (Heiser) B.L.Turner, syn of subsp. runyonii

Helianthus praecox is a North American species of sunflower known by the common name Texas sunflower. It is endemic to Texas. Most of the populations are either along the Gulf Coast or in the Río Grande Valley.[2]

Helianthus praecox grows on sandy soils and coastal prairies. It is an annual herb up to 150 cm (60 inches or 5 feet) tall. One plant usually produces 1-3 flower heads, each containing 11-16 yellow ray florets surrounding 35 or more red or purple disc florets.[3]

Subspecies[1][3][4]

References

  1. ^ a b The Plant List, Helianthus praecox Engelm. & A.Gray 
  2. ^ Biota of North America Program 2014 county distribution map
  3. ^ a b Flora of North America, Helianthus praecox Engelmann & A. Gray, 1847.  Texas sunflower 
  4. ^ Billie L. Turner. 2014. Taxonomy of the Texas sunflower (Helianthus praecox) Asteraceae. Phytologia (April 1, 2014) 96(2) 107 includes county-level range map for all 3 subspecies

External links


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This page was last edited on 21 March 2021, at 22:24
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