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Abstract Detail


Systematics Section

Wilson, Carol [1].

Progress toward a new subgeneric classification for Iris.

Previous systematic treatments for the approximately 300 species of Iris recognized six subgenera and two to five segregated genera based on characters such as sepal beards and/or crests, seed arils, and the type of geophytic organ present. Recent phylogenetic studies have shown that several of these subgenera are not monophyletic and that most of the characters used in earlier classifications are homoplastic across the genus. Phylogenetic relationships among the six Iris subgenera were reconstructed based on chloroplast sequence data using maximum likelihood and Bayesian inference methods. A preliminary classification is presented that recognizes 10 subgenera and one unresolved clade. Leaf, floral and geophytic morphology and structure are examined in light of the new information on evolutionary relationships.Lineages not fully sampled and those that are not considered stable are also discussed.

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Research on the genus Iris


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Keywords:
anatomy
classification
Iridaceae
Iris
morphology
Phylogeny.

Presentation Type: Oral Paper:Papers for Sections
Session: 35
Location: Lindell C/Chase Park Plaza
Date: Tuesday, July 12th, 2011
Time: 3:45 PM
Number: 35009
Abstract ID:570


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