Ok, apologies for posting the pdf. Apparently pdf's on this subject abound and there probably wasn't a need to post this one.
I'm learning a lot from all of them so while I'm here to sink this thread I might as well post an even slightly more broad based and informative pdf.
I particularly liked that it gave the really simple farm houses I see around here a style name - the Homestead Style. Although many of the ones around here don't even have the porch.

Here is a link that might be useful: architectural styles, early 1900s

Thank you for posting this pdf, marys1000. I too am learning a lot about house styles. The more I read and look the more I think my house is a rural version of Italianate. But it's hard, at least for me, to tell when dealing with simpler houses. Often times those architecture style guides only show the big fancy houses. Which is fine, but I like to see common simple houses that are all over the place here. And while they may not have all the fancy woodwork they are still beautiful in their own right.

Just for fun, I'm adding a link to a Craftsman Style Guide (which I think is published in Glendale, CA.).

Here is a link that might be useful: Craftsman Style Guide