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Black nightshade (Solanum nigrum): leaves and fruits. Pen drawing, partially coloured.

Five flowering plants, including bistort (Polygonum bistorta) and knotgrass (Polygonum aviculare). Chromolithograph by W. Dickes & co., c. 1855.

Six flowering plants: five types of sandwort (Arenaria species) and a sea purslane (Honkenya peploides). Chromolithograph by W. Dickes & co., c. 1855.

Plantain or ribwort (Plantago sp.): flowering plant with separate flower. Coloured etching by M. Bouchard, 1774.

Two species of hawk's beard plant (Crepis species): flowering and fruiting stems. Coloured lithograph by W. G. Smith, c. 1863, after himself.

Cape shamrock or yellow sorrel (Oxalis corniculata L.): entire flowering and fruiting plant. Coloured etching by M.Bouchard, 1772.

Knawel plant (Scleranthus perennis): flowering plant and floral segments. Coloured engraving after J. Sowerby, 1796.

Chickweed (Cerastium ciliatum): entire flowering plant with separate floral segments. Coloured etching after J. Schütz, c.1802.

Five flowering plants, including water pepper (Polygonum hydropiper) and redleg (Polygonum persicaria). Chromolithograph by W. Dickes & co., c. 1855.

Boerhavia hirsuta L.: flowering and fruiting stem with root and separate leaf. Coloured engraving after F. von Scheidl, 1770.

Common or field bindweed (Convolvulus arvensis): flowering stem. Watercolour, 1904.

Black nightshade (Solanum nigrum L.): flowering and fruiting stem. Coloured etching by M. Bouchard, 1774.

Sandwort (Arenaria gracilis): entire flowering plant with separate floral segments. Coloured etching after J. Schütz, c.1802.

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Boerhavia hirsuta L.: flowering and fruiting stem with root and separate leaf. Coloured engraving after F. von Scheidl, 1770.

Common or field bindweed (Convolvulus arvensis): flowering stem. Watercolour, 1904.

Black nightshade (Solanum nigrum L.): flowering and fruiting stem. Coloured etching by M. Bouchard, 1774.

Cape shamrock or yellow sorrel (Oxalis corniculata L.): entire flowering and fruiting plant. Coloured etching by M.Bouchard, 1772.

Sandwort (Arenaria gracilis): entire flowering plant with separate floral segments. Coloured etching after J. Schütz, c.1802.