Dr. Matthew R. Cover is a professor of ecology in the Department of Biological Sciences at California State University Stanislaus, where he has been teaching biology, ecology, and environmental science since 2008. On his blog, he has compiled a list of funding and internship opportunities open to undocumented college students. His post links to further information as well, and is a great resource for students and educators alike.
From the blog:
"Although undocumented students are not eligible for support through NSF REUs and many other programs funded directly by the federal government of the U.S.A., there are a variety of programs funded by non-federal sources where eligibility does not depend upon American citizenship. All of these research programs run during a 8-10 week summer session and typically provide a stipend (often $3000-$7000), lodging, meals, and/or travel expenses. Note that eligibility requirements are not always clear on web sites; some of these programs have been added to the list based on conversations with program directors. Students with questions should contact program directors directly."
Read more here.