Title: Aquatic plants of Pennsylvania : a complete reference guide /
Authors: Block, Timothy A.; Rhoads, Ann Fowler.
Publisher: University of Pennsylvania Press,
Year: 2011
Subjects: Aquatic plants Pennsylvania Identification.
Contents: Evolution and ecology -- Identification keys -- Emergent plants -- Floating-leaf plants -- Thalloid and/or tiny floating plants -- Submergent leafy-stemmed plants -- Submergent rosette forming plants -- Submergent plants with finely divided leaves.