Vol. 23 of Watsonia, edited by M. Briggs, D.L. Kelly, D.R. McKean, D.A. Pearman, M.N. Sanford & D.A. Simpson. Papers are provided here free for personal use, but remain copyright of the BSBI and may not be reproduced or sold without permission.

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Bowlt, E.M. & C. 2000. John Blackstone (1713-1753); a London apothecary and botanist of his time. Watsonia 23, 39-46; pdf 771kb.

Preston, C.D. 2000. Engulfed by suburbia or destroyed by the plough: the ecology of extinction in Middlesex and Cambridgeshire. Watsonia 23, 59-81; pdf 1.63Mb.

Holyoak, D.T. 2000. Hybridisation between Rumex rupestris Le Gall (Polygonaceae) and other docks. Watsonia 23, 83-92; pdf 835kb.

Bailey, J.P. & Conolly, A.P. 2000. Prize-winners to pariahs - A history of Japanese Knotweed s.l. (Polygonaceae) in the British Isles. Watsonia 23, 93-110; pdf 1.26Mb.

Hollingsworth, M.L. & Bailey, J.P. 2000. Hybridisation and clonal diversity in some introduced Fallopia species (Polygonaceae). Watsonia 23, 111-121; pdf 704kb.

Forbes, R.S. 2000. Assessing the status of Stratiotes aloides L. (Water-soldier) in Co. Fermanagh, Northern Ireland. Watsonia 23, 179-196; pdf 1.27Mb.

Walker, K.J. 2000. The distribution, ecology and conservation of Arenaria norvegica subsp. anglica Halliday (Caryophyllaceae). Watsonia 23, 197-208; pdf 1Mb.

Williams, L.R. 2000. Annual variation in the size of a population of Cardamine impatiens L. Watsonia 23, 209-212; pdf 323kb.

Box, J.D. 2000. Mistletoe Viscum album L. (Loranthaceae) on oaks in Britain. Watsonia 23, 237-256; pdf 1.93Mb.

Oredsson, A. 2000. Choice of surveyor is vital to the reliability of floristic change studies. Watsonia 23, 287-291; pdf 2.52MB.

Rich, T.C.G. 2000. Conservation of Britain’s biodiversity: Hieracium cambricum (Asteraceae), Welsh Hawkweed. Watsonia 23, 305-310; pdf 2.91Mb.

Rich, T.C.G. & Houston, L. 2000. Conservation of Britain’s biodiversity: Hieracium tavense (Asteraceae), Black Mountain Hawkweed. Watsonia 23, 311-316; pdf 2.62Mb.

Randall, R.D. & Rich, T.C.G. 2000. Conservation of Britain’s biodiversity: Rubus trelleckensis (Rosaceae), Trelleck Bramble. Watsonia 23, 317-322; pdf 3.12Mb.

Usher, M.B. 2000. The nativeness and non-nativeness of species. Watsonia 23, 323-326; pdf 379kb.

Rich, T.C.G. & Birkinshaw, C.R. 2001. Conservation of Britain’s biodiversity: Carex depauperata With. (Cyperaceae), Starved Wood-sedge; pdf 5.5Mb.

Randall, R.D. & Rich, T.C.G. 2001. Conservation of Britain’s biodiversity: Rubus dasycoccus (Rosaceae), Thick-berried Bramble. Watsonia 23, 437-442; pdf 4Mb.

Rich, T.C.G. 2001. What is Anthyllis vulneraria L. subsp. corbierei (Salmon & Travis) Cullen (Fabaceae)? Watsonia 23, 469-480; pdf 5.66Mb.

Khalaf, M.K. & Stacem C.A. 2001. The distinction between Cerastium tomentosum L. and C. biebersteinii DC. (Caryophyllaceae), and their occurrence in the wild in Britain. Watsonia 23, 481-491; pdf 5.79Mb.

Blackstock, N. & Ashton, P.A. 2001. A re-assessment of the putative Carex flava agg. (Cyperaceae) hybrids at Malham Tarn (v.c. 64): a morphometric analysis. Watsonia 23, 505-516; pdf 6.15Mb.

Rich, T.C.G. & Motley, G.S. 2001. Conservation of Britain’s biodiversity: Hieracium linguans (Zahn) Roffey (Asteraceae), Tongue Hawkweed. Watsonia 23, 517-523; pdf 3.24Mb.

Spalton, L.M. 2001. A new subspecies of Bromus hordeaceus L. (Poaceae). Watsonia 23, 525-531; pdf 3.67Mb.

Bailey, J.P. 2001. Fallopia x conollyana The Railway-yard Knotweed. Watsonia 23, 539-541; pdf 157kb.