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Abstract Detail



Systematics Section/ASPT

Kephart, Susan R. [1], Mortimer, Sebastian [2].

Linking floral anthesis, pollination, and species boundaries in Camassia (Agavoideae: Asparagaceae).

Increasingly scientists are recognizing that the evolutionary patterns of diverse lineages are dynamic in time and space, arising in concert with the ecological and historical contexts that drive them. Thus both hybridization and competition can shape outcomes such as pollinator partitioning within a community or character displacement of floral traits within a lineage. Climate, geography, and biotic factors all interact to initiate and maintain species boundaries, setting limits to gene flow via reproductive and/or spatial isolation. Floral anthesis defines the period during which pollination is possible, yet its role in reproductive isolation has been studied in relatively few lineages. We explore both the timing of onset and the duration of floral opening in the genus Camassia, a complex of North American taxa with both ecological and ethnobotanical significance. We find evidence of both verspertine and diurnal pollination linked to the timing and duration of anthesis.


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1 - Willamette University, Department Of Biology, Salem, OR, 97301, USA
2 - Willamette University, Biology

Keywords:
Agavaceae
Camassia
anthesis
Species delimitation
reproductive isolation
temporal variation
hybridization.

Presentation Type: Oral Paper:Papers for Sections
Session: 49
Location: Salon 4/The Shaw Conference Centre
Date: Tuesday, July 28th, 2015
Time: 4:45 PM
Number: 49013
Abstract ID:1342
Candidate for Awards:None


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