Arabidopsis was the first plant to have its genome sequenced and totals around 125 MB of data. It was sequenced in the year 2000.
Arabidopsis thaliana is also known as thane cress or mouse-ear cress. It is a small flowering plant found in Europe and Asia. It is a popular model organism in plant biology and genetics, as it has a small genome, is easy to grow and has a short life cycle of about 6 weeks.