Premise: Justicia umbrosa (Brazilian plume, yellow jacobinia; syn. "Adhatoda umbrosa" Ness, and "Justicia aurea" Schltdl.) is an ornamental shrub native of Cerrado vegetation of Brazil. This plant may be propagated by herbaceous stem cutting, and it can usually get to 1,50 - 2,50 m tall. They flourish in the shade, and will not do well if overwatered.
Hypothesis: Justicia umbrosa is an underwater plant