Only us vulnerable at matchpoints, partner opened one club, with the following. I responded one heart, partner bid one spade I bid two spades. (Opponents passed throughout).
My bid showed at least four spades and more than four hearts (since I bid them first). Partner feared that I had as little as six points and passed because she felt that her hand (14 high card points) was also close to a minimum.
I had expected at least an invitational bid of three hearts. I felt that partner's hand was more than a bare minimum, especially in view of the apparent double fit in the majors. We actually made five spades because of this double fit, and the fact that I had 11 high card points (and more like 15, counting distribution).
Was partner too conservative in her evaluation of her hand and mine? Or was it reasonable for her to treat her cards and my bids as showing near minimum values playing standard American?