Leptosiphon aureus

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Leptosiphon aureus
Leptosiphonaureus.jpg
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 [1]
Linanthus aureus

Leptosiphon aureus is a species of flowering plant in the phlox family known by the common name golden linanthus. [2]

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,[1][3] and Leptosiphon aureus subsp. decorus for a smaller range of populations. [4][5]

Distribution[edit]

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. [6]

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. [2]

Description[edit]

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. [7]

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.

Subspecies[edit]

Two subspecies, currently replacing the binomial species name in taxonomy, overlap in geography but do not occur together. [8] [2]

References[edit]

External links[edit]