1) Dilleniid dicot genus 2) Genus arabidopsis 
Arabidopsis (rockcress) is a genus in the family Brassicaceae. They are small flowering plants related to cabbage and mustard. This genus is of great interest since it contains thale cress (Arabidopsis thaliana), one of the model organisms used for studying plant biology and the first plant to have its entire genome sequenced. Changes in thale cre...
A genus of flowering plants found in north temperate regions. The species a. Thaliana is used for experiments in classical plant genetics as well as molecular genetic studies in plant physiology, biochemistry, and development. ... (12 Dec 1998) ... 
[n] - a genus of the mustard family having white or yellow or purplish flowers
genus Arabidopsis noun a genus of the mustard family having white or yellow or purplish flowers; closely related to genus Arabis