Shell – ls: Do not show directories that match same pattern in wildcard searches, only files

Supposing I have something like the following, a typical business PC situation:

drwxr-xr-x 1 whatever whoever       3 Oct  3 16:40 invoices2009
drwxr-xr-x 1 whatever whoever       4 Oct  3 16:40 invoices2010
drwxr-xr-x 1 whatever whoever       2 Oct  3 16:40 invoices2011
-rwxr-xr-x 1 whatever whoever  440575 Oct  3 16:40 tax2010_1
-rwxr-xr-x 1 whatever whoever  461762 Oct  3 16:40 tax2010_2
-rwxr-xr-x 1 whatever whoever  609123 Oct  3 16:40 tax2010_3

Now let's be lazy and just type:

$ ls -l *2010*

Supposing that there is something in the invoices2010 directory, it won't work as expected. Since the directory name contains the 2010 year as well, ls will also list the files in invoices2010, although I only want to list those in the current directory.
Even funnier: imagine the tax2010* files weren't there at all and there were not those three directories as in the example, but 50 of them. Yes I've tried it out: ls will not even indicate which files are in which directory, but simply list them top-down, just as if all files resided in the current directory (unless you explicitly specify the -R option, certainly I do know that)

Plus, I know that I can do this with find, too, but is there also any way to accomplish this task with a plain ls one-liner (which, obviously, has a far less complicated syntax)?