This is a list of the keys and their symbols:
⎋ Escape
⇥ Tab forward
⇤ Tab back
⇪ Capslock
⇧ Shift
⌃ Control(this is the one you are looking for)
⌥ Option (Alt, Alternative)
⌘ Command
␣ Space
⏎ Return
↩ Return
⌫ Delete back
⌦ Delete forward
⇱ Home
↖ Home
↸ Home
⇲ End
↘ End
⇞ Pageup
⇟ Pagedown
↑ Up arrow
⇡ Up arrow
↓ Down arrow
⇣ Down arrow
← Left arrow
⇠ Left arrow
→ Right arrow
⇢ Right arrow
⌧ Clear
⇭ Numberlock
⌤ Enter
⏏ Eject
⌽ Power