Below you can find the This family of trees has 2 genera populus & salix; we wonder to which one alyson hannigan belongs Jeopardy Words Answer. The answer to This family of trees has 2 genera populus & salix; we wonder to which one alyson hannigan belongs has 6 letters. This clue belongs to the Science category and is part of Jeopardy Word Level 1889. If you scroll near the bottom you will find other clues and answers part of level 1889