Petasites frigidus var. sagittatus (Banks ex Pursh) Cherniawsky

Chicago citation style
Petasites frigidus var. sagittatus (Banks ex Pursh) Cherniawsky. 16 Jun 1880. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_12966400&repo=DPLA. (Accessed December 12, 2018.)
APA citation style
(16 Jun 1880) Petasites frigidus var. sagittatus (Banks ex Pursh) Cherniawsky. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_12966400&repo=DPLA
MLA citation style
Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_12966400&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.