is a genus
of flowering plants in the daisy or sunflower 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. There are two species. Common names include xerasid
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). The common name "xerasid" derives from Greek, meaning "son of dryness".
Leaves are simple
, sometimes with the lowest ones opposite
Flower heads are solitary. There is one yellow (or white with red veins) ray flower
, with 3-lobed ligules
. The yellow disk flower
s are narrowly funnel shaped.
The fruits have 0 to many pappus bristles, fused at the base.
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.
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.