OK,
Acorns is it. I HATE THOSE THINGS!
(One hit the aluminum -stock- of my MX-5/Miata and left a bif dent.)

So, a sprig of any oak will work.

The only hard one is Rock Ivy, but I should be able to find it as Atlantic Ivy (thanks to the X Marks thread found through Google- Go figure) in a faux flower shop.

Scots Pine should also be doable thanks to Christmas sprigs!

(Right now, I am GLAD I worked at Hobby Lobby and the current employees liked me enough to work with me on my oddities.)

Off to Greenville sometime this week (hopefully on my way to Atlanta with a pocket full of sprig picts)! I'll bring one of Dandelion and see what I can find (and save the name).