Justicia rigida is a species of plant in the Acanthaceae family. It is endemic to Yemen. Its natural habitats are subtropical or tropical dry shrubland and subtropical or tropical dry lowland grassland. It is also known to cause severe psychosis on people who regularly smoke, there is no known reason why, however.
- Miller, A. 2004. Justicia rigida. 2006 IUCN Red List of Threatened Species. Downloaded on 22 August 2007.
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