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Abstract Detail



Systematics Section/ASPT

Endara, Lorena [1], Carlsward, Barbara [2].

Anatomical characterization of warts on Scaphosepalum (Orchidaceae: Pleurothallidinae).

In pleurothallid orchids warts can be found on different plant parts like the cauline sheaths, bracts or leaves and have been documented in Scaphosepalum; Teagueia, Dresslerella, and Porroglossum and they. In the genus Scaphosepalum the presence of well-developed warts on the peduncles and pedicels has been a diagnostic character of the section Scaphosepalum. The anatomical characterization of warts was conducted in different plants parts and different Scaphosepalum species with the objective to assess their homology. We found that warts are formed by an aggregation of parenchyma with a sunken glandular hair or stomata and for this reason, warts on inflorescences and pedicels of different species were considered homologous. Character reconstruction was performed using maximum likelihood and the molecular-based tree topology. Based on the character reconstructions, the section Scaphosepalum is paraphyletic, because it includes all the warty Scaphosepalum species with exception of S. dalstroemii and S. bicristatum.

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Related Links:
Phylogeny of Scaphosepalum


1 - University of Florida, Florida Museum of Natural History, Gainesville, FL, 32611, USA
2 - Eastern Illinois University, Department of Botany, Life Sciences Bldg. 2070, 600 Lincoln Ave., Charleston, IL, 61920, USA

Keywords:
orchids
warts
Anatomy
ancestral character reconstruction.

Presentation Type: Poster:Posters for Sections
Session: P
Location: Grand Salon A - D/Riverside Hilton
Date: Monday, July 29th, 2013
Time: 5:30 PM
Number: PSY064
Abstract ID:918
Candidate for Awards:None


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