| Abstract Detail
Systematics Section/ASPT Macias, Angie Marie [1], Carlsen, Monica [2], Bogler, David [2]. The genus Anthurium in northern Central America: morphology, ecology, and evolution. Anthurium Schott (Araceae) is a Neotropical genus estimated to have at least 1000 taxa. In the past, this genus has been organized into sections based largely on vegetative morphology. However, a recent molecular phylogeny [Carlsen & Croat 2013] indicates that most of these sections are polyphyletic, and it suggests that geographic and sexual characters are more taxonomically reliable. This study focuses on the vegetative and reproductive morphology of three clades geographically restricted to northern Central America. SEM images of the pollen grains from each clade showed differences in exine ornamentation: Clade A has gemmate supratectal elements, Clade 4 showed microreticulate exine with short spines and no obvious apertures, and Clade 16 showed fine reticulation with 2-4 apertures. Clade 16 was most similar to other groups of Anthurium not studied here, but these tend to have more open, wide reticulation. A Lucid Key was developed by scoring 92 morphological and reproductive characters for 47 species. Herbarium material was the primary source of information, but live material and previous taxonomic descriptions were also used. Analyses of species distribution models show that each clade has its core of diversity in a different part of Central America, but the actual climatic differences between the regions have yet to be analyzed. In general, the three clades studied are very distinct from each other, and from other more widespread groups, in their overall morphology and ecological needs.
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1 - Cornell University, Ithaca, NY, 14853
2 - Missouri Botanical Garden, St. Louis, MO, 63166
Keywords:
Araceae
Anthurium
pollen
Morphology
Lucid key
species distribution.
Presentation Type: Poster:Posters for Sections
Session: P
Location: Eyrie/Boise Centre
Date: Monday, July 28th, 2014
Time: 5:30 PM
Number: PSY004
Abstract ID:926
Candidate for Awards:None |
