| Leptosiphon aureus | |
|---|---|
| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Eudicots |
| (unranked): | Asterids |
| Order: | Ericales |
| Family: | Polemoniaceae |
| Genus: | Leptosiphon |
| Species: | L. aureus |
| Binomial name | |
|
Leptosiphon aureus (Nutt.) J.M.Porter & L.A.Johnson |
|
| Synonyms | |
|
Leptosiphon aureus var. aureus − (Nutt.) E. Vilm |
|
Leptosiphon aureus var. aureus − (Nutt.) E. Vilm
Linanthus aureus
Leptosiphon aureus is a species of flowering plant in the phlox family known by the common name golden linanthus.
It has been reclassified by the USDA and the Jepson Manual (TJM2) from a binomial nomenclature to two subspecies: Leptosiphon aureus var. aureus for the majority of populations, and Leptosiphon aureus subsp. decorus for a smaller range of populations.
The plant is native to the Southwestern United States in Arizona, Nevada, New Mexico, and Southern California; and to northwestern Mexico in Baja California state.
It grows in desert flats and desert chaparral of the Mojave Desert and Sonoran Desert; in chaparral and woodlands of the Peninsular Ranges and Transverse Ranges; and in pinyon-juniper woodlands and madrean pine-oak woodlands of Madrean Sky Islands.
Leptosiphon aureus is an annual herb producing a thin, threadlike stem with occasional leaves divided into narrow needlelike lobes. The oppositely arranged leaves are each divided into very narrow bristlelike lobes up to a centimeter long.
The tip of the stem has an inflorescence of usually a single flower with corolla lobes under a centimeter long. With the two subspecies: ssp. aureus generally has bright to golden yellow flowers; while ssp. decorus has white or cream blooms. The bloom period is March to June.