Wilson, Carol .
Patterns of molecular and morphological diversity in Iris section Oncocyclus.
Iris subg. Iris sect. Oncocyclus occur in desert and mountain habitats along the eastern shore of the Mediterranean Sea north into Syria, central Turkey, Iran, and the south Caucasus. The approximately 35 species and 10 infraspecific taxa in sect. Oncocyclus are distinguished by seed with large, fleshy arils, rhizomes with compact segments, a single flower, sepals with a prominent dark spot distal to a bearded area, and upright petals that overlap distally forming a tunnel. Studies of 33 taxa using plastid and nuclear introns indicate that relative to other subg. Iris species, the clade is characterized by unusually high morphological and low nuclear diversity. The sister taxon is an arillate species that lacks the flower specializations present in sect. Oncocyclus species. It is hypothesized that animal interactions including pollinator specialization and local dispersal of seed by ants have contributed to the patterns of diversity observed.
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1 - Rancho Santa Ana Botanic Garden, 1500 North College Avenue, Claremont, CA, 91711-3157, USA
Single/low copy nuclear genes
Presentation Type: Oral Paper:Papers for Sections
Location: Delaware B/Hyatt
Date: Tuesday, July 10th, 2012
Time: 2:30 PM