Gele monnikskap (Aconitum vulparia)

Takje met een bloem van de Corydalis

D. van Alphen

Scabiosa of Knautia

Unknown Artist

Waterkers (Rorippa of Nasturtium)

Unknown Artist

Holwortel (Corydalis cava)

Unknown Artist

Gomphocarpus fruticosus, formerly Asclepias fruticosa (Tennis-ball milkweed)

Robert Jacob Gordon

Witkleurige blauwe knoop (Succisa)

Unknown Artist

Onbekende plant

Unknown Artist

Ganzerik (Potentilla)

Unknown Artist

Jack by the Hedge (Alliaria)

Unknown Artist

Boterbloem (Ranunculus)

Unknown Artist

Zijdeplant (Asclepias syriaca)

Unknown Artist

Poison Ivy from the Plants series

Louis Prang & Co.