fresh water

Duck potato Sagittaria latifolia botanical illustration by Lizzie Harper showing underwater “potato” growths

Greater Bird’s-foot trefoil Lotus pendunculatus or Lotus uliginosus with calyx detail

Fool’s water-cress Apium nodiflorum with seed and flower detail

Water fern Azolla filiculoides shown floating with water repelling properties

Gypsywort Lycopus europaeus with detail of flower calyx and seed

Water forget-me-not Myosotis scorpiodes showing growth habit

Water figwort Scrophularia auriculata with detail of flower stem and seed

Water-violet Hottonia palustris showing submerged leaves

Water-pepper Persicaria hydropiper or Polygonum hydropiper

Brooklime Veronica beccabunga in flower showing red stem

Amphibious bistort Polygonum amphibium floating form in flower

Common butter-bur Petasites hybridus with male flowers inflorescence

Celery-leaved buttercup Ranunculus sceleratus showing whole plant and roots

Common duckweed Lemna minor showing plant growing and close up of flower

Ivy-leaved water crowfoot Ranunculus hederaceus showing sprawling habit

Great yellow-cress Rorippa amphibia with detail of seed and flower

Water soldier Stratiotes aloides showing emergent leaves

Skullcap Scutellaria galericulata showing distinctive blue flowers

Marsh horsetail Equisetum palustre with strobili growing in shallow water or marshland.

Trout swimming Salmo trutta seen from above on a sandy river bottom, demonstrating carangiform movement

Stonefly larva on dand and pebbles river or pond or stream substrate, with drop shadow

Stonefly larva Plecoptera cut to white

Pond skater Gerris lacustris

Medicinal leech Hirudo medicinalis cut to white, swimming and in motion