Please read through this webpage put together by Eileen Herring:
http://www.hawaii.edu/sciref/botany105.html
The attachments below are taken off of that website--please read them and familiarize yourself with these useful tools (floor plan of the library to find hard copies, Voyager online catalog of our library to locate resources, guides to various tools for searching for articles).
Please be careful with Google scholar (http://www.scholar.google.com). You may find it to be a useful search engine for initial browsing, but it can also very easily lead you down the wrong path, and may not show you important resources you may find with these other search tools. Make sure you can distinguish if something is peer-reviewed literature or not and when you should/need to use sources that are peer-reviewed.