Great blue lobelia
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Asterales
- family: Campanulaceae
- genus: Lobelia
- species: Lobelia siphilitica
Boortmeerbeek
Flanders
BelgiumNew Westminster
British ColumbiaConcord
Gananoque
Markham
Niagara Falls
Willowdale
Ontario
CanadaGöteborg
Västra Götaland
SwedenPinson
AlabamaDenver
ColoradoChesterton
Gary
Hammond
Porter
IndianaCabin John
Easton
Silver Spring
MarylandMinden
NebraskaAthens
OhioWashington, D. C.
Washington, D.C.
United States