推选答案美国大学植物学排名：
1 Univ. of California，Davis
2 Univ. of Texas at Austin
3 Cornell Univ.
4 Univ. of California，Berkeley
5 Univ. of Wisconsin，Madison
6 Yale Univ.
7 Duke Univ.
8 Michigan State Univ.
9 Univ. of California，Riverside
10 Univ. of Illinois atUrbana---Champaign
11 Univ. of Georgia
12 Univ. of Minnesota
13 Univ. of Michigan
14 Univ. of Massachusetts
15 Univ. of North Carolina
16 Washington Univ.， St. Louis
17 Claremont College
18 Florida State Univ.
19 Indiana Univ.
20 Purdue Univ.