how to delete iphone photo album without itunes

I accidentally synced a couple personal photo albums to my iPhone. i could find no way to delete the album and when i tried tried to delete teh individual photos one by one I found the delete photo option (little trash can) was missing and I could not figure out how to delete either the individual photos or the entire album.

The answer is to do it from iTunes: In the photos tab select "sync photos from iPhoto. Select "selected albums" then simply be sure no albums are selected from your iPhoto menu. When I synced all the photo albums except "camera roll" were deleted from the iPhone.

Cheers!