Dryopteris x bootii (Underw.) Underw

Chicago citation style
Dryopteris x bootii (Underw.) Underw. 8 Jul 1909. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_12478038&repo=DPLA. (Accessed November 20, 2018.)
APA citation style
(8 Jul 1909) Dryopteris x bootii (Underw.) Underw. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_12478038&repo=DPLA
MLA citation style
Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_12478038&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.