Looks like Common Bermudagrass. Here is a link that might be useful: Bermudagrass

Yes, very likely Phalaris aquatica. California has all eleven of the native and non-native Phalaris species found in the US, per BONAP. Of those, the two large ones are P. aquatica and P. arundinacea. That second one, though, has heads spread like fescue, so P. aquatica pretty much wins by default. If you're interested in details, the Grass Manual on the Web is an excellent resource. Follow the link to their home page, then browse the menu on the left side of the screen to Phalaris, and click on the Treatment button for the full key. Or just browse further down to Phalaris aquatica, click the treatment button, and it will take you to the page with detailed description. I also included a close shot of our smaller Phalaris caroliniana for comparison. The structure is surprisingly similar to your plant. Here is a link that might be useful: Grass Manual on the Web This post was edited by jekeesl on Sat, Jul 12, 14 at 23:12

It looks like crabgrass, Digitaria.

We’re going with Tif-Tuf Bermuda if anyone else stumbles on this similar issue.