Observation on the beach plum
Subtitle: a study in plant variation
By: by John Young Pennypacker
Series: [Contributions from the Botanical Laboratory of the University of Pennsylvania -- v. 4, no. 2]
Publisher: University of Pennsylvania?
Published: 1915
Place of publication: Philadelphia?
Language: eng
Number of pages: 269
Subjects: Beach plum
Notes: Reprinted from Contributions from the Botanical Laboratory of the University of Pennsylvania, vol. 4, no. 2.

Thesis (Ph.D.)--University of Pennsylvania, 1915.

Bibliography: p. 268-269.