New North American Umbelliferae
Subtitle: I, II, & III
By: Mildred E. Mathias and Lincoln Constance
Published: 1942
Language: eng
Notes: Bulletin of the Torrey Botanical Club: v. 69, no. 2. p. 151-155, February 1942; v. 70, no. 1, p. 58-61, January 1943; v. 86, no. 6, p. 374-382, November 1959.