Cirsium engelmannii Rydb

Chicago citation style
Cirsium engelmannii Rydb. 26 Jun 1946. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_12977912&repo=DPLA. (Accessed November 19, 2018.)
APA citation style
(26 Jun 1946) Cirsium engelmannii Rydb. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_12977912&repo=DPLA
MLA citation style
Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_12977912&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.