Syntrichopappus

Syntrichopappus
Syntrichopappus fremontii
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Subfamily: Asteroideae
Tribe: Madieae
Subtribe: Baeriinae
Genus:
A.Gray
Type species
Syntrichopappus fremontii
A.Gray
Species

2, see text

Syntrichopappus is a genus of flowering plants in the family Asteraceae, found in the southwestern United States and northern Mexico, including Baja California. It is a member of the Heliantheae alliance of the Asteraceae family.[1] There are two species.[2] Common names include xerasid[2] and Frémont's gold.[3]

The name "Syntrichopappus" derives from a Greek name: "syn" = "joined together", "tricho" = "hair", of the "pappus", which means many bristles fused at the base (however some species have no pappus).[2][4] The common name "xerasid" derives from Greek, meaning "son of dryness".[2]

Description

Leaves

Leaves are simple, alternate, sometimes with the lowest ones opposite.[4]

Inflorescence

Flower heads are solitary.[4] There is one yellow (or white with red veins) ray flower per phyllary, with 3-lobed ligules.[4] The yellow disk flowers are narrowly funnel shaped.[4]

Fruits

The fruits have 0 to many pappus bristles, fused at the base.[4]

Species

  • Syntrichopappus fremontii (yellowray Frémont's gold) is native to desert regions of the American southwest and adjacent Baja California. It is a small woolly herb just a few centimeters tall bearing flower heads with usually five toothed yellow ray florets.[5][6]
  • Syntrichopappus lemmonii (pinkray Frémont's gold) is endemic to California, where it can be found in the southern coastal mountain ranges, including the Transverse Ranges. Its flower heads contain white, red-veined ray florets with pink undersides.[7][8]

References

  1. ^ "Genus Syntrichopappus". Universal Protein Resource (UniProt).
  2. ^ a b c d California Desert Wildflowers, An Introduction to Families, Genera, and Species; Sia Morhardt, Emil Morhardt; p 74-5
  3. ^ NRCS. "Syntrichopappus". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 7 December 2015.
  4. ^ a b c d e f Jepson Desert Manual: Syntrichopappus, Dale E. Johnson, 2002 Ed., p 184
  5. ^ Jepson Manual Treatment: S. fremontii
  6. ^ Flora of North America: S. fremontii
  7. ^ Jepson Manual Treatment: S. lemmonii
  8. ^ Flora of North America: S. lemmonii


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