supinum

Updated: May 13, 2025

Coming now to particular instances, we may turn our attention in the first place to the genus Sisymbrium. Two species are reputed to have bracts, Sisymbrium hirsutum and S. supinum. Each flower-stalk of their long racemes is situated in the aril of such a bract, and the peculiarity is quite a natural one, corresponding exactly to what is seen in the inflorescence of other families.

Hugo de Vries - Species and Varieties, Their Origin by Mutation