4 petals

Garlic mustard or Jack by the hedge Alliaria petiolata pen and ink line drawing

Tormentil Potentilla erecta plant showing both shapes of leaves

Rosebay Willowherb Chamaenerion angustifolium

Pondweed Potamogeton praelongus with seeds held erect out of the water and lanceolate leaves underwater

Oil seed rape flower Brassica napus flowering spike in stippled pen and ink with watercolour top wash

Meadow rue Thalictrum flavum showing flowering head and leaves

Meadow rue Thalictrum flavum pencil drawing

Garlic Mustard Alliaria petiolata with flowers and fruiting pods

Germander speedwell Veronica chamaedrys with close up of the square stem, and one flower.

Broadleaved willowherb Epibolium montanum with flowers, long seed pods and lots of leaves