Septicweed
Senna occidentalis
Summary 4
Senna occidentalis is a pantropical plant species.
Taxon biology 5
Cassia occidentalis is a widely distibuted pantropical herb, thought to have originated in the tropical American region. Many farmers consider this plant a weed species that interferes with agricultural production, and it is treated with benzoate herbicides. It is often found growing at roadsides and other disturbed areas. Currently it is found in such disparate places as the Neotropics including locations as far north as Florida and in African locations such as Zimbabwe.
This herb, also known as Arsenic bean, is a taprroted annual that can attain a height of one meter.
The solid stems manifest as erect or ascending. The emerging twigs and young stems are smooth sparsely glabrous. The petiolate leaves are alternate. Leaves may exhibit as compound, sometimes pinnate. Flowers are yellow or orange.
Sources and Credits
- (c) W. L. Wagner, some rights reserved (CC BY-NC-SA), https://collections.nmnh.si.edu/services/media.php?env=botany&irn=10242652
- (c) Forest & Kim Starr, some rights reserved (CC BY), https://www.biolib.cz/IMG/GAL/50706.jpg
- (c) John Tann, some rights reserved (CC BY), http://farm4.static.flickr.com/3132/5733063317_16eefa97f1.jpg
- (c) Wikipedia, some rights reserved (CC BY-SA), http://en.wikipedia.org/wiki/Senna_occidentalis
- (c) Unknown, some rights reserved (CC BY-NC), http://eol.org/data_objects/8695441
More Info
- iNat taxon page
- African Plants - a photo guide
- Atlas of Living Australia
- Biodiversity Heritage Library
- BOLD Systems BIN search
- Catalogo de Plantas y Líquenes de Colombia
- eFloras.org
- Flora of North America (beta)
- Global Biodiversity Information Facility (GBIF)
- HOSTS - a Database of the World's Lepidopteran Hostplants
- IPNI (with links to POWO, WFO, and BHL)
- Maryland Biodiversity Project
- NatureServe Explorer 2.0
- SEINet Symbiota portals
- Tropicos
- USDA PLANTS database
- World Flora Online
