Just weeds eh? Probably what most people will assume when looking at this picture.
This plant belongs to the Blepharis genus in the family Acanthaceae. Note that this genus contains a lot of subgroups and is still being studied intensively under botanists, so proper species identification is difficult. 'Blepharis' compromises of about 129 species found in arid and seasonally dry habitats. These plants have been found to exhibit a wide range of pharmacological activities including anti-oxidant, anti-microbial, anti-inflammatory and cytotoxic activities. Often used by traditional healers as an alternative to conventional medicine by using the bioactive compounds, this plant features qualities much more interesting than the everyday weed.
Don't be biased. Study "weeds" as well as the plants you find in your everyday Plant Nursery.