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Scientific Name Wolffia columbiana Karst. Common Name Columbian watermeal General Description A colonial, free-floating, globe-shaped aquatic plant that rarely produces flowers and is 0.8-1 mm wide; it has no roots, leaves or stems. Leaves The upper surface of the plant bears 1-10 stomata. Flowers Two; upper surface; 1 pistillate; 1 staminate. Reproduction is primarily vegetative. Fruits and Seeds Inflated; globe-shaped; only one. Phenology Flowering rarely; summer - early fall. Range/Distribution Alberta: N/C Alberta. CAN (BC, SK, ON, QC, NB); USA (AL, AR, CA, CO, CT, DE, FL, GA, IL, IN, IA, KS, KY, LA, ME, MD, MA, MI, MN, MS, MO, MT, NE, NH, NJ, NY, NC, ND, OH, OK, OR, PA, RI, SC, SD, TN, TX, VT, WV, WI).