Prezygotic Reproductive Isolation between Mimulus Guttatus and Mimulus Glaucescens

iii ACKNOWLEDGEMENTS I would like to express my deepest gratitude to the following people, without whom this thesis never would have been possible.-To the BCCER for your financial support, which greatly helped in acquiring greenhouse supplies and fuel for driving up and down Honey Run.-To my advisor and friend Dr. Chris Ivey, for hours of engaging scientific discussion and entertaining all of my ideas. For molding this project into some semblance of sense, and for convincing me that Mimulus is indeed the best study system.-To my colleague and friend Nicole Habecker and her husband Joe, for taking on the other half of this study, and for throwing the best potlucks ever.-To Nate and Leah for allowing us to watch pollinators on the side of road in front of their house, while people driving by looked at us like we were crazy.-To Carey Bruns, for assisting me in looking crazy on the side of the road, while waiting hours upon hours in the sun and rain for insects to visit us.-To my wife Linda, family, and friends who incessantly asked me how my thesis was going, and faithfully put up with me along the way.-And finally to my son Oscar, for always being the best distraction ever, and reminding me that there is more to life than just speciation.