Daily Archives: 21st of October 2011

The nature of ‘bracteoles’ in Atripliceae

The nature of ‘bracteoles’ in Atripliceae

The nature of ‘bracteoles’ in Atripliceae

The tribe Atripliceae (Chenopodiaceae) has been characterized by having perianthless female flowers surrounded by two accrescent bracts/bracteoles. Flores-Olvera et al conduct a floral ontogenetic study using LM and SEM for nine species of Atriplex, Chenopodium, Dysphania and Spinacia and show that all flowers develop a perianth. The so-called bracts/bracteoles are actually modified perianth members; moreover, a large flexibility in the sex determination of the flowers exists, with flowers within some species varying from bisexual, functionally unisexual to strictly unisexual.