Articles

• The phenology of an urban street flora: a transect study

  Chris Preston

  1-26

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• Hybridisation and introgression in British Helosciadium (Apiaceae).

  Stuart D. Desjardins, Andrew G. Shaw, Judith A. Webb

  27-42

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• Cotula alpina (Asteraceae) naturalised in the British Isles

  Kevin J. Walker, Linda Robinson, Duncan Donald

  43-55

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• Three new species of hawkweed (Hieracium; Asteraceae) from northern England

  D.J. McCosh, D. Barlow, B. Burrow, T.C.G. Rich

  56-63

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• Mentha cervina (Lamiaceae), an emergent aquatic alien species naturalising at South Gare, North-East Yorkshire

  Ambroise Baker

  64-68

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• Lectotypification and neotypification of some names in British Hieracium section Foliosa (Asteraceae)

  T.C.G. Rich

  69-72

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• Taraxacum pseudomarklundii, a south-western European species, native in South Devon (v.c.3).

  John J. Day, A. John Richards

  73-76

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