Lobelia siphilitica

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Great blue lobelia
Lobelia siphilitica Botanical Garden Heidelberg 2.JPG
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Asterales
Family: Campanulaceae
Subfamily: Lobelioideae
Genus: Lobelia
Species: L. siphilitica
Binomial name
Lobelia siphilitica

Lobelia siphilitica, the great blue lobelia[1] or great lobelia,[2] is a plant species within the Campanulaceae family. 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.[3] It is a short lived perennial (with each plant living for only a few years).[3]

Although self-compatible, a flower is unable to offer pollen to itself and it must be pollinated by insects (primarily bees in the Bombus genus).[3]


  1. ^ "Lobelia siphilitica". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 26 January 2016. 
  2. ^ "BSBI List 2007". Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-02-25. Retrieved 2014-10-17. 
  3. ^ 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