Asteraceae

Coulter's horseweed

Laennecia coulteri (A.Gray) G.L.Nesom

Family: Asteraceae
Genus: Laennecia

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Common names

By language (1)

English: Coulter's horseweed

Synonyms

Conyza coulteri A.Gray
Conyza coulteri Rothr.
Conyza coulteri var. coulteri
Conyza coulteri var. virgata (Benth.) A.Gray
Conyza subdecurrens A.Gray
Conyzella coulteri (A.Gray) Greene
Erigeron discoideus Kellogg
Erigeron subdecurrens A.Gray
Eschenbachia coulteri (A.Gray) Rydb.

Characteristics

Growth habit: Forb/herb
Lifespan: Annual
In the US and Canada: Lower 48 states: native

Photos

Photo: Matt Berger, CC BY 4.0, from Wikimedia Commons
Photo: JerryFriedman, CC BY-SA 3.0, from Wikimedia Commons
Photo: JerryFriedman, CC BY-SA 3.0, from Wikimedia Commons
Photo: Jim Morefield from Nevada, USA, CC BY-SA 2.0, from Wikimedia Commons
Photo: Patrick Alexander from Las Cruces, NM, CC0, from Wikimedia Commons
Photo: Patrick Alexander from Las Cruces, NM, CC0, from Wikimedia Commons
Photo: Patrick Alexander from Las Cruces, NM, CC0, from Wikimedia Commons
Photo: Jim Julius, CC BY 4.0, from Wikimedia Commons
Photo: Plantman, CC BY-SA 4.0, from Wikimedia Commons
Photo: Alex Abair, CC BY 4.0, from Wikimedia Commons

More in Laennecia

Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.