L. siphilitica has hermaphroditic flowers that exhibit dichogamy and are protandrous. Previous research on L. cardinalis (a plant with a similar life history but different pollinator) has found the plant to be phenotypically male-biased. I designed the following study to examine two populations of L. siphilitica to determine its flowering patterns through an entire flowering season. I predicted that at during the height of the flowering season the proportion of staminate to pistillate phase flowers would be approximately equal. In addition, I predicted that at the beginning of the flowering season the population would be male-biased and at the end of the flowering season the population would be female-biased. In this study, the flowering pattern showed a peak in staminate phase flowers at the start of the flowering season and a peak in pistillate phase flowers at the end of the flowering season. The study’s findings showed that both populations were female-biased overall.
Maleah Farnam, ’01 Bayfield, CO
Sponsor: Marty Condon