Leptosiphon ambiguus

{{Short description|Species of flowering plant}}{{More citations needed|date=June 2025}}{{Speciesbox

|genus = Leptosiphon

|species = ambiguus

|authority = (Rattan) J.M.Porter & L.A.Johnson

|synonyms = Linanthus ambiguus (Rattan) Greene

}}

Leptosiphon ambiguus (syn. Linanthus ambiguus), the serpentine linanthus,{{Citation needed|date=June 2025|reason=cn for this name}} is a low annual plant with narrowly lanceolate leaves and a vivid lavender flower.{{Cite web |title=Leptosiphon ambiguus |url=https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=80953 |access-date=2025-06-19 |website=ucjeps.berkeley.edu}} It grows generally in serpentine soils{{Cite web |title=Lady Bird Johnson Wildflower Center - The University of Texas at Austin |url=https://www.wildflower.org/plants/result.php?id_plant=LEAM13 |access-date=2025-06-19 |website=www.wildflower.org}} and is an endemic threatened species of the Bay Area{{Citation needed|date=June 2025}} in California.