Penstemon clevelandii var. angelicus I.M. Johnst

Chicago citation style
Penstemon clevelandii var. angelicus I.M. Johnst. 3 May 1921. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_2152749&repo=DPLA. (Accessed November 13, 2018.)
APA citation style
(3 May 1921) Penstemon clevelandii var. angelicus I.M. Johnst. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_2152749&repo=DPLA
MLA citation style
Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_2152749&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.