Fig. 1.

Comparison of Arabidopsis thaliana Columbia and Leavenworthia alabamica. Despite belonging to the same plant family (Brassicaceae), these species differ in many phenotypes. For example, A. thaliana Columbia (a) has simple leaves, an elongated primary inflorescence, short floral branches (pedicels), small flowers, narrow fruit, and an early flowering time in standard glasshouse conditions. By contrast, L. alabamica (b, c) has pinnately compound leaves, a suppressed primary inflorescence, elongated pedicels, large flowers, broader fruit, and a late flowering time in standard glasshouse conditions. Photos of L. alabamica kindly provided by J. Busch.