Ruud de Block: Nymphaea alba - Waterlelie
Ruud de Block: Nymphaea alba - Waterlelie-1
Ruud de Block: Nymphaea caerulea
Ruud de Block: Nymphaea coerulea - Edinburgh botanical garden
Ruud de Block: Nymphaea coerulea - Leiden
Ruud de Block: Nymphaea 'Director G.T. Moore' - Botanischer Garten Jena
Ruud de Block: Nymphaea 'Director G.T. Moore' - Meise
Ruud de Block: Nymphaea 'Director G.T. Moore' - Meise-1
Ruud de Block: Nymphaea 'Pamela' - Edinburgh botanical garden
Ruud de Block: Victoria amazonica - Edinburgh botanical garden
Ruud de Block: Nymphaea tetragona - BG Meise-001
Ruud de Block: Nymphaea tetragona - BG Meise-002
Ruud de Block: Nymphaea 'Director G.T. Moore' - Meise. Moore' - Meise-004
Ruud de Block: Nymphaea 'Director G.T. Moore' - Meise. Moore' - Meise-001
Ruud de Block: Nymphaea alba - BG Kopenhagen
Ruud de Block: Nymphaea alba - BG Kopenhagen-002
Ruud de Block: Nymphaea alba - BG Kopenhagen-001
Ruud de Block: Nymphaea 'Gladstoniana' - BG Delft
Ruud de Block: Nymphaea 'Marliacea Carnea' - BG Delft-000
Ruud de Block: Nymphaea 'Marliacea Chromatella' - BG Delft-001
Ruud de Block: Nymphaea nouchali var. caerulea (Savigny) B. Verdcourt (Syn. N. capensis Thunb.) 'Wilhelma dunkelrot' - Botanischer Garten der Universität Oldenburg.) 'Wilhelmina dunkelrot' - Botanischer Garten der Universität Oldenburg
Ruud de Block: Nymphaea hybride
Ruud de Block: Nymphaea hybride-001
Ruud de Block: Nymphaea 'Director G.T. Moore' - BG Meise-000
Ruud de Block: Nymphaea 'Director G.T. Moore' - BG Meise-001
Ruud de Block: Nymphaea 'Director G.T. Moore' - BG Meise-002
Ruud de Block: Nelumbo nucifera 'Friendship Peony's' - Kew Gardens
Ruud de Block: Nymphaea nouchali var. zanzibariensis (Casp.) B. Verdcourt (Syn. Nymphaea colorata Peter) - Latvia University Botanical Gardens - Riga-02
Ruud de Block: Nymphaea 'Tropic Sunset' - BG Utrecht
Ruud de Block: Euryale ferox Salisb. ex K. D. Koenig & Sims. - BG Berlin