When I was a kid I'd get really aggravated if I asked my mother what she might like for, say, her birthday or Mother's Day; and she'd always say, "Oh.. I'm happy with anything. A card of bobby-pins is even nice." It irked me because I wanted a "straight answer" from her, and I thought she was just thinking about not wanting me to spend whatever money I had.
My own kids are now grown. I now understand why my mother's answer was always "a card of pretty bobby-pins, or something like that", because I now know that (at least with most mothers) any gift our kids select for us is memorable and very much treasured. That's not saying that because our kids are so important in our lives, and because their presence in our lives makes everything else pale (although those things are true). It's saying, though, that when a gift comes attached to a tag with their name on it, and when a little part of them (and the love between them and their mother) has gone into the selection and wrapping of the gift, that gift has been "embedded", or "endowed", with "memorable" and "treasured"; no matter what the gift is.
It turns out I was wrong in thinking my mother just didn't want me spending my money on a gift for her. Now, I understand that one of those "cards of pretty bobby-pins" really would have meant something to her. :)
Having said that... maybe flowers, lunch out with you at a nice little place, and something she'd have after the flowers are gone ( maybe a nice vase to go with them), maybe a little piece of jewelry - anything nice) :) (By the way, I don't suggest you get her a card of bobby-pins, no matter what I just said. That might me "memorable" - but probably not the kind of "memorable" you're aiming for. LOL )