Lobelia siphilitica

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Great blue lobelia
Lobelia siphilitica.jpg
Scientific classification edit
Kingdom: Plantae
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Campanulaceae
Genus: Lobelia
L. siphilitica
Binomial name
Lobelia siphilitica

Lobelia siphilitica, the great blue lobelia[2] or great lobelia,[3] is a plant species within the family Campanulaceae. It is a herbaceous, perennial dicot native to eastern and central Canada and United States. Growing up to three feet tall, it lives in zones 4 to 9 in moist to wet soils. It produces a spike of zygomorphic flowers in the late summer.

It blooms from August to October.[4] It is a short lived perennial (with each plant living for only a few years).[4]

Although self-compatible, a flower is unable to offer pollen to itself and it must be pollinated by insects (primarily bees in the genus Bombus).[4]


  1. ^ "Lobelia siphilitica". IUCN Red List of Threatened Species. Version 2019.1. International Union for Conservation of Nature. 2019. Retrieved 18 June 2019.
  2. ^ "Lobelia siphilitica". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 26 January 2016.
  3. ^ "BSBI List 2007". Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-01-25. Retrieved 2014-10-17.
  4. ^ a b c Caruso, C. M. (2006), "Plasticity of inflorescence traits in Lobelia siphilitica (Lobeliaceae) in response to soil water availability", American Journal of Botany, 93 (4): 531–8, doi:10.3732/ajb.93.4.531, PMID 21646213