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- Title
NOTES ON THE FLORAL ANATOMY OF DEERINGOTHAMNUS SMALL (ANNONACEAE): CORTICAL VASCULAR SYSTEMS IN A CHAOTIC PATTERN.
- Authors
Deroin, Thierry; Norman, Éliane M.
- Abstract
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.
- Subjects
DEERINGOTHAMNUS; FLOWER anatomy; STAMEN
- Publication
Modern Phytomorphology, 2016, Vol 9, p3
- ISSN
2226-3063
- Publication type
Article