Equisetum hyemale var. affine (Engelm.) A.A. Eaton

Chicago citation style
Equisetum hyemale var. affine (Engelm.) A.A. Eaton. 14 Apr 1949. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_12250505&repo=DPLA. (Accessed November 21, 2018.)
APA citation style
(14 Apr 1949) Equisetum hyemale var. affine (Engelm.) A.A. Eaton. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_12250505&repo=DPLA
MLA citation style
Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_12250505&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.