Genus Hygrophila, Family Acanthaceae.

Bibliography/Further Reading:

Baensch, Hans A. & Rudiger Riehl. 1993. Aquarium Atlas, v. 2. BAENSCH, Germany. 1212 pp.

Brunner, Gerhard. 1973. Aquarium Plants. T.F.H. Publications, NJ. 159 pp.

James, Barry. 1986. A Fishkeeper's Guide To Aquarium Plants. Salamander Books, U.K.. 117 pp.

Kasselman, Christel. 1994. Decorative aquarium plants: Hygrophila polysperma (Roxburgh) T. Anderson. The Aquarium Gardener 7:4, 94 (DATZ reprint)

Radford, Albert E. 1986. Fundamentals of Plant Systematics. Harper & Row, NY. 498 pp.

Rataj, Karel. 1986. The big and beautiful Hygrophila angusitfolia. TFH 12/86.

Rataj, Karel. 1988. Hygrophila polysperma: classic aquarium plant or newcomer? TFH 2/88.

Raven, Peter H., Ray F. Evert and Helena Curtis. 1976 2d ed.. Biology of Plants. Worth Publishers, Inc., NY. 685 pp.

Riehl, Rudiger & Hans A. Baensch. 1987. Aquarium Atlas, v. 1. MERGUS, Germany. 992 pp.

Riehl, Rudiger & Hans A. Baensch, 1996. Aquarium Atlas, v. 3. MERGUS, Germany. 1103 pp.

Roe, Colin D. 1967. A Manual of Aquarium Plants. Shirley Aquatics, England. 111 pp.

Stemmermann, Lani. 1981. A Guide to Pacific Wetland Plants. U.S. Army Corps of Engineers, Honolulu. 118 pp.

Stodola, Jiri. 1967. Encyclopedia of Water Plants. T.F.H. Publications, NJ. 368 pp.