Keywords: FMIB 36315 Hornwort (Ceratophyllum demersum).jpeg check categories 18 September 2015 4 Hornwort Ceratophyllum demersum Found in ponds and slow streams throughout North America except extreme north This plant is shallow-rooted deriving most of its sustenance from the water Will thrive in cold spring water Subject Hornworts Bryophytes Ceratophyllum Tag Aquatic Botany 1917 Cite book Fish Ponds on Farms Report of the United States Commissioner of Fisheries for the Fiscal Year 1915 Johnson Robert S ; Stapleton M F Washington DC Government Printing Office 1917 Plate VII-2 Robert S Johnson M F Stapleton PD-UWASH-FMIB Institution University of Washington FMIB-source accession number 36315 Images from the Freshwater and Marine Image Bank to check Robert S Johnson M F Stapleton Bryophyta Ceratophyllum |