For Spirodela
Landolt, E. 1980. Key to the determination of taxa within the family of Lemnaceae. Veröffentlichungen des Geobotanischen Institutes der Eidg. Techn. Hochschule, Stiftung Rübel, Zürich 70: 13-21.
Landolt, E. 1986. The family of Lemnaceae – a monographic study. Veröffentlichungen des Geobotanischen Institutes der Eidg. Techn. Hochschule, Stiftung Rübel, Zürich 71: 1-566.
Landolt, E. 2000. Lemnaceae. In Flora of North America Editorial Committee. 2000. Flora of North America north of Mexico. Volume 22, Magnoliophyta: Alismatidae, Arecidae, Commelinidae (in part), and Zingiberidae. Oxford Univ. Press, New York, NY. 352 pp.
Landolt. 1998. In Kubitzki, K., ed. 1998b. The families and genera of vascular plants. IV. Flowering plants – Monocotyledons – Alismatanae and Commelinanae (except Gramineae). Springer, Berlin. 511 pp.
Les, D.H., and D.J. Crawford. 1999. Landoltia (Lemnaceae), a new genus of duckweeds. Novon 9: 530-533.
Spaulding, D.D., T.W. Barger, H.E. Horne, and B.J. Finzel. 2019. Flora of Northern Alabama, part 4. Basal Monocots. Phytoneuron 2019-47: 1–132. Published 29 October 2019. ISSN 2153 733X
Cite as...