Close-up views of Wolffiella lingulata in wetland pond by Discovery Center, Brazoria NWR. Size: 5-10 mm. Wide, tongue-shaped parent/daughter fronds shown with angle of pouch typically 70-120 degrees. Plant body is a semicircle in side view. Ref: eFlora and C. D.Stutzenbaker (Aquatic and Wetland Plants of the Western Gulf Coast).