TY - JOUR AU - Deroin, Thierry AU - Norman, Éliane M. PY - 2016 TI - Notes on the floral anatomy of Deeringothamnus Small (Annonaceae): cortical vascular systems in a chaotic pattern JF - Modern Phytomorphology; Vol 9 (2016) DO - 10.5281/zenodo.159689 KW - N2 - Floral anatomy of Deeringothamnus Small, an endemic and endangered annonaceous genus from Florida comprising 2 species, was studied. It is mainly distinguished by missing any sclerenchyma at anthesis – apart from anthers – and by a chaotic vasculature exhibiting a partial perianth-stamen cortical vascular system, appearing as an over-evolution of the pattern previously described in the neighbouring Asimina and other paracarpous and pseudosyncarpous genera. Such a pattern is amazingly similar to that previously recognized in the most basal annonaceaous genera, as e.g. Ambavia , and might be considered as a reversion to an ancestral state. These alterations toward decrease are related to the receptacle flatness and lack of pollination chamber, and seem parallel with the dwarf habit of this genus. UR - http://ojs.phytomorphology.org/index.php/MP/article/view/25