|Photo by Wayne Matchett, SpaceCoastWildflowers.com|
|Division:||Magnoliophyta - Flowering plants|
|Class:||Magnoliopsida – Dicotyledons|
| Stachytarpheta jamaicensis|
|Natural range of Stachytarpheta jamaicensis from USDA NRCS Plants Database.|
Common names: Light-blue snakeweed, Blue porterweed, Joee
Synonym: Valerianoides jamaicensis (Linnaeus) Kuntze
Stachytarpheta comes from the Greek words: stachys meaning spike and tarphys meaning thick or dense, which both refer to the dense flower spike. The specific epithet refers to the species origin: Jamaica.
S. jamaicensis is a small, sprawling perennial shrub whose younger stems are green or purplish in color, glabrous, and square. The blue or pink flowers are borne terminally on long, stringy spikes at the end of the stems. Leaves are opposite, simple, serrated, and ovate. Fruits are inconspicuous.
Seeds can be spread by animals, clothing, vehicles, and contaminated agricultural produce.
The following Hymenoptera families and species were observed visiting flowers of Stachytarpheta jamaicensis at Archbold Biological Station: 
Apidae: Bombus pennsylvanicus
Use by animals
Conservation and management
Cultivation and restoration
Flowers of Stachytarpheta jamaicensis
Photo by Wayne Matchett, SpaceCoastWildflowers.com
References and notes
- []Eat the Weeds. Accessed: March 17, 2016
- []Weeds of Australia. Accessed: March 16, 2016
- []University of Florida Extension. Accessed: March 17, 2016
- []Lee County Extension. Accessed: March 16, 2016
- Florida State University Robert K. Godfrey Herbarium database. URL: http://herbarium.bio.fsu.edu. Last accessed: November 2015. Collectors: Robert K. Godfrey. States and Counties: Florida: Monroe. Compiled by Tall Timbers Research Station and Land Conservancy.
- Deyrup, M.A. and N.D. 2015. Database of observations of Hymenoptera visitations to flowers of plants on Archbold Biological Station, Florida, USA.
- []Encyclopedia of Life. Accessed: March 17, 2016