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 FLORA OF NORTHERN ALABAMA, PART 4. BASAL MONOCOTS: ACORALES AND ALISMATALES SWEETFLAG TO PONDWEEDS DANIEL D. SPAULDING Senior Curator Anniston Museum of Natural History 800 Museum Drive Anniston, Alabama 36206
[email protected] T. WAYNE BARGER Alabama Dept. of Conservation and Natural Resources State Lands Division, Natural Heritage Section 64 North Union Street Montgomery, Alabama 36130
[email protected] HOWARD E. HORNE Barry A. Vittor and Associates, Inc. 8060 Cottage Hill Road Mobile, Alabama 36695
[email protected] BRIAN J. FINZEL St. John Paul II Catholic High School 7301 Old Madison Pike Huntsville, Alabama 35806
[email protected] ABSTRACT This paper is a floristic guide to native and naturalized monocots in the orders Acorales and Alismatales found within the Interior Plains and Appalachian Highlands of northern Alabama. Families included in this treatment are: Acoraceae, Araceae, Alismataceae, Tofieldiaceae, Hydrocharitaceae, and Potamogetonaceae. Identification keys, photographs, maps of occurrence in northern Alabama, habitats, flowering and fruiting times, distributional data, pertinent synonymy, and comments are provided for each taxon. Flowering plants (angiosperms) have historically been separated into two distinct groups, distinguished by characteristic differences such as leaf venation, organization of floral structures, and the number of cotyledons (embryonic seed leaves). Dicots or dicotyledons are plants having leaves with netted venation, tetramerous or pentamerous (four or five-parted) flowers, and two cotyledons. Monocots or monocotyledons are plants having parallel venation, grass-like leaves, trimerous (three- parted) flowers, and a single cotyledon.