References for the Somerset Rare Plant Register

Updated Nov 2023

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Akeroyd, J.R. (2014). Docks and knotweeds of Britain and Ireland.  2nd ed. of Docks and Knotweeds of the British Isles by J.E. Lousley and D.H. Kent.  BSBI Handbook No.3.  Botanical Society of Britain and Ireland, London.

Anon. (1953). Botanical report. Mid-Somerset Naturalist Society Report and Reference Book 2: 30-31.

Babington, C.C. (1834). Flora Bathoniensis: or a catalogue of the plants indigenous to the vicinity of Bath. Collings, Bath.

Babington, C.C. (1839). Flora Bathoniensis: or a catalogue of the plants indigenous to the vicinity of Bath. 2nd ed. Collings, Bath.

Barnett, K. & Rich, T.C.G. (2000).  Thlaspi perfoliatum L. new to Worcestershire (v.c. 37).  Watsonia 23: 220.

Boon, H.W. (1960 [misprint for 1961]).  Botanical notes 1960.  Mid-Somerset Naturalist Society Report and Reference Book 10: 28-30.

Bowen, H. (2000). The flora of Dorset. Pisces Publications, Newbury.

Callow, R.S. (1975) 689. Koeleria Pers. in Stace, C A. ed. (1975). Hybridization and the flora of the British Isles. Academic Press, London.

Callow, R.S. (1980). Evolution in a polyploid complex.  Watsonia 13: 77-78.

Callow, R.S. & Parker, J.S. (1979). Breeding behaviour and population differentiation in the hexaploid grass Koeleria vallesiana (Honck.) Bertol..  New Phytologist 83: 537-547.

Cheffings, C.M. & Farrell, L., eds. (2005). The vascular plant red data list for Great Britain. Joint Nature Conservation Committee, Peterborough.

Clark, T. (1858). A catalogue of the rarer plants of the Turf Moors of Somerset.  Proceedings of the Somersetshire Archaeological and Natural History Society 7: 64-71.

Collinson, J. (1791). A history and antiquities of the county of Somerset. R. Cruttwell, Bath.

Cope, T. & Gray, A. (2009). Grasses of the British Isles. BSBI Handbook No. 13.  Botanical Society of the British Isles, London.

Crouch, H.J. (2009). Diverse routes to Glastonbury. BSBI News 110: 45-46.

Crouch, H.J. (2016).  Rare plants survey of the Cheddar Complex SSSI: 2016.  Unpublished Report for Natural England.

Crouch, H.J, McDonnell, E.J., Miles, S. & Rich, T.C.G. (2019). Distribution and population size of Hieracium stenolepiforme (Pugsley) P. D. Sell & C. West, Cheddar Hawkweed (Asteraceae). British & Irish Botany 1: 1-6.

Dandy, J.E. & Taylor, G. (1939).  Studies of British Potamogetons.– IV. The identity of Potamogeton Drucei.  Journal of Botany 77: 56-62.

Davies, E.W. (1956). Some new chromosome numbers in the Cyperaceae.  Watsonia 3: 242-243.

Davis, B.N.K. (1977).  The Hieracium flora of chalk and limestone quarries in England.  Watsonia 11: 345-351.

Druce, G.C. (1904).  Aster linosyris in North Somerset.  Journal of Botany 42: 385.

Dunn, S.T. (1896). Somerset aliens. Journal of Botany 34: 478.

Dunn, S.T. (1897).  Aliens from Turkish barley.  Journal of Botany 35: 444-445.

Edwards, B. & Pearman, D. (2004). Dorset rare plant register: an account of the rare, scarce and declining plants of Dorset. Dorset Environmental Records Centre in conjunction with the Botanical Society of the British Isles, Dorchester.

Ellis, R.G. (1983).  Flowering plants of Wales. National Museum of Wales, Cardiff.

Erskine, S.E., Killick, H.J., Lambrick, C.R. & Lee, E.M. (2018).  Oxfordshire’s threatened plants: a register of the rare and scarce plants of the administrative county, and of vice-county 23.  Pisces Publications, Newbury.

Evans, T.G. (2006). Equisetum ramosissimum Desf. – Branched Horsetail. BSBI Welsh Bulletin 77: 10-11.

Farrant, A.R. (2008). A walkers’ guide to the geology and landscape of eastern Mendip. British Geological Survey, Nottingham.

Fitzgerald, R. (1986).  New records from V.c. 6, North Somerset. BSBI Hieracia Group Notes 10: 5-6.

FitzGerald, R. (1990).  Rare plant survey of south-west England. Volume One – Somerset. Unpublished report for Nature Conservancy Council.

FitzGerald, R. (2019).  An intertidal adventure.  BSBI News 141: 23-26.

FitzGerald, R. & Jermy, C. (1987). Equisetum ramosissimum in Somerset. Pteridologist 1: 178-181.

FitzGerald, R. & McDonnell, E.J. (1997). Cheddar Gorge rare plants survey. Unpublished report for English Nature.

Foley, M.J.Y. (1990). The current distribution and abundance of Orchis ustulata L. in southern England. Watsonia 18: 37-48.

Fraser-Jenkins, C.R. (1980).  Dryopteris affinis: a new treatment for a complex species in the European pteridophyte flora.  Willdenowia 10: 107-115.

Fraser-Jenkins, C.R. (2007).  The species and subspecies in the Dryopteris affinis group.  Fern Gazette 18: 1-26.

Fry, D. (1888). Helianthemum polifolium Pers. in N. Somerset.  Journal of Botany 26: 313.

Giddens, C.J. (1984). Atlas to the flowers of Exmoor. Alcombe Books, Minehead.

Gill, J.J.B., McAllister, H.A. & Fearn, G.M. (1978). Cytotaxonomic studies on the Cochlearia officinalis L. group from inland stations in Britain. Watsonia 12: 15-21.

Green, I.P., Higgins, R.J., Kitchen, C. & Kitchen, M.A.R. (2000). The flora of the Bristol region. Pisces Publications, Newbury.

Green, P. (2008). Flora of County Waterford. National Botanic Gardens of Ireland.

Green, P.R., Green, I.P. & Crouch, G.A. (1997). The atlas flora of Somerset. Published by the authors.

Grenfell, A.L. (1980).  Aliens galore at Brislington Tip. BSBI News 25: 17-18.

Grenfell, A.L. (1984).  Reports: Excursions held in connection with the Annual General Meeting.  Watsonia 15: 61-62.

Hope-Simpson, J.F. (1987). Cautionary tale III. BSBI News 47: 22-23.

Hounsome, G. (2011).  Fumaria reuteri in Surrey (v.c.17).  BSBI News 118: 20.

Howarth, W.O. (1933).  Notes on Koeleria Pers.  Report of the Botanical Society and Exchange Club of the British Isles 10: 37-41.

Hubbard, C.E. (1975).  708. Alopecurus L. in Stace, C A. ed. (1975). Hybridization and the flora of the British Isles. Academic Press, London.

Hubbard, C.E. (1984). Grasses: a guide to their structure, identification, uses, and distribution in the British Isles. 3rd ed., revised by J.C.E. Hubbard. Penguin Books, Harmondsworth.

Hudson, W. (1778).  Flora AnglicaEditio altero [2nd ed.], J. Nourse, London.

Jenyns, L. (1867). Lecture on the Bath flora. Proceedings of the Bath Natural History and Antiquarian Field Club 1: 25-63.

Keble Martin, W. & Fraser, G.T. (1939). Flora of Devon: phanerogams, vascular cryptogams, charophyta. T. Buncle & co., Arbroath.

Knass, G., Mundell, T., Norton, J. & Rand, M. (2012). New sites for Martin’s Ramping-fumitory Fumaria reuteri in Hampshire (v.cc.11 & 12).  BSBI News 119: 8-9.

Linton, E.F. (1909).  Notes on the flora of Dorset.  Journal of Botany 47: 378-384.

Lousley, J.E. & Kent, D.H. (1981). Docks and knotweeds of the British Isles. Botanical Society of the British Isles, London.

Lovatt, C.M. (1982). The history, ecology and status of the rare plants and the vegetation of the Avon Gorge, Bristol. PhD thesis. University of Bristol.

Maskew, R. (2014).  The flora of Worcestershire.  Published by the author, Tenbury Wells.

Marren, P. (1999). Britain’s rare flowers. T. & A.D. Poyser, London.

Marshall, E.S. (1909).  Somerset plant-notes for 1908.  Journal of Botany 47: 255-261.

Marshall, E.S. (1914). A supplement to the flora of Somerset. Somerset Archaeological and Natural History Society, Taunton.

Marshall, E.S. (1916). Somerset plant-notes for 1915. Journal of Botany 54: 97-105.

Marshall, E.S. (1917). Somerset plant-notes for 1916. Journal of Botany 55: 179-191.

Marshall, E.S. (1919). Notes on Somerset plants for 1918. Journal of Botany 57: 175-181.

McCosh, D.J. & Rich, T.C.G. (2011).  Atlas of British and Irish Hawkweeds (Pilosella L. and Hieracium L.).  Botanical Society of the British Isles, London.

McCosh, D.J. & Rich, T.C.G. (2018).  Atlas of British and Irish Hawkweeds (Pilosella Hill and Hieracium L.).  Second edition.  Botanical Society of the British Isles, London.

McDonnell, E.J. (1992). Reports of field meetings – 1991: Axbridge, Mendip Hills, N. Somerset (v.c. 6) 9th June.  BSBI News 60: 50-51.

McDonnell, E.J. (1998). Reports of field meetings – 1996 & 1997: Crook Peak & Brean Down, N. Somerset (v.c. 6) 7th & 8th June.  BSBI News 78: 75.

McDonnell, E.J. & Pollock, K. (1999).  Reports of field meetings – 1998: Shapwick Heath and Southlake Moor, N. Somerset (v.c. 6), 6th & 7th June.  BSBI News 81: 62-64.

McHaffie, H. (2010). Two more Fumaria reuteri (Martin’s Ramping-fumitory) locations in Scotland.  BSBI News 114: 26-27.

Melderis, A. (1958). Plant notes: 572/5 Scutellaria altissima L. Proceedings of the Botanical Society of the British Isles 3: 47.

Metherell, C. & Rumsey, F.J. (2018).  Eyebrights (Euphrasia) of the UK and Ireland.  BSBI Handbook No. 18.  Botanical Society of Britain and Ireland, Bristol.

Miller, W.D. (1933). A note on extinct and rare species of the county of Somerset. Report of the Botanical Society and Exchange Club of the British Isles 10: 268-276.

Murray, R.P. (1896). The flora of Somerset. Barnicott & Pearce, Taunton.

Parsons, A. (2010).  An annotated list of the flora of Steep Holm.  Privately published.

Pearman, D.A. & Edwards, B. (2002).  Valerianella eriocarpa Desv. in Dorset, and a reassessment of its status as a presumed introduction in Britain.  Watsonia 24: 81-89.

Perring, F.H. & Farrell, L. (1977). British red data books: 1. Vascular plants. SPNC, Lincoln.

Perring, F.H. & Farrell, L. (1983). British red data books: 1. Vascular plants, 2nd ed. Royal Society for Nature Conservation, Lincoln.

Perring, F.H. & Sell, P.D. eds. (1968).  Critical supplement to the atlas of the British flora.  Thomas Nelson & Sons, London.

Polwhele, R. (1797). The history of Devonshire. Volume 1. Trewman & Son, Exeter.

Preston, C.D. (1995).  Pondweeds of Great Britain and Ireland.  B.S.B.I. Handbook No. 8.  Botanical Society of the British Isles, London.

Preston, C.D., Pearman, D.A. & Dines, T.D. eds. (2002). New atlas of the British & Irish flora. Oxford University Press, Oxford.

Proctor, M.C.F. (1956). Ecological and historical factors in the distributions of the British Helianthemum species.  Journal of Ecology 46: 349-371.

Randall, R.D. (1982). Botanical records. Bath Natural History Society Magazine (1982): 1101-1103.

Ray, J. (1688).  Fasciculus stirpium Britannicarum, post editum Plantarum Angliae Catalogum observatarum. Londini.

Rich, T.C.G. (1991). Crucifers of Great Britain and Ireland. BSBI Handbook No. 6.  Botanical Society of the British Isles, London.

Rich, T.C.G. (1999). Conservation of Britain’s biodiversity: Cyperus fuscus L. (Cyperaceae), Brown Galingale. Watsonia 22: 397-403.

Rich, T.C.G. & Birkinshaw, C.R. (2001). Conservation of Britain’s biodiversity: Carex depauperata With. (Cyperaceae), Starved Wood-sedge. Watsonia 23: 401-411.

Rich, T.C.G. & Lockton, A.J. (2002).  Bromus interruptus (Hack.) Druce (Poaceae) – an extinct English endemic.  Watsonia 24: 69-80.

Rich, T.C.G. & McDonnell, E.J. (2001). Distribution and conservation of Hieracium cyathis, Chalice Hawkweed. Unpublished report from National Museum of Wales to Countryside Council for Wales and English Nature.

Rich, T.C.G., Kitchen, M.A.R. & Kitchen, C. (1989).  Thlaspi perfoliatum L. (Cruciferae) in the British Isles: distribution.  Watsonia 17: 401-407.

Rich, T.C.G., McDonnell, E.J. & Lledó, M.D. (2008).  Conservation of Britain’s biodiversity: the case of Hieracium cyathis (Asteraceae) and its relation to other apomictic taxa.  Botanical Journal of the Linnean Society 156: 669-680.

Roe, R.G.B. (1981). The flora of Somerset. Somerset Archaeological and Natural History Society, Taunton.

Roe, R.G.B. (1983). Vascular plants 1982. Proceedings of the Somerset Archaeological and Natural History Society 127: 131-134.

Roe, R.G.B. (1984). Vascular plants 1983 and 1984. Proceedings of the Somerset Archaeological and Natural History Society 128: 109-116.

Roe, R.G.B. (1986). Losses and threatened losses from the Somerset flora. Proceedings of the Somerset Archaeological and Natural History Society 130: 193-199.

Roe, R.G.B. (1988). Vascular plants 1987. Proceedings of the Somerset Archaeological and Natural History Society 131: 273-278.

Roe, R.G.B. (1989). Vascular plants 1988. Proceedings of the Somerset Archaeological and Natural History Society 132: 341-346.

Rumsey, F.J. (2008a). Oak Fern (Gymnocarpium dryopteris (L.) Newman) found in Surrey.  Pteridologist 5: 2.

Rumsey, F.J. (2008b). Broomrapes of the British Isles. British Wildlife 19: 264-270.

Rumsey, F.J. (2018). The status of Teucrium chamaedrys (Wall Germander) in the British Isles.  BSBI News 137: 20-23.

Rumsey, F.J., Crouch, H.J. & Tosh, J. (2012). Review of Ophrys apifera x O. insectifera (beefly orchid) in the British Isles, with validation of the hybrid name Ophrys x pietzschiiNew Journal of Botany 2: 100-109.

Rumsey, F.J., Jermy, A.C. & Sheffield, E. (1998). The independent gametophytic stage of Trichomanes speciosum Willd. (Hymenophyllaceae), the Killarney Fern and its distribution in the British Isles. Watsonia 22: 1-19.

Rumsey, F.J. & Jury, S.L. (1991). An account of Orobanche L. in Britain and Ireland.  Watsonia 18: 257-295.

Rumsey, F.J. & Spencer, M. (2012). Is Equisetum ramosissimum (Equisetaceae: Equisetophyta) native to the British Isles? Fern Gazette 19: 37-46.

Rutter, J. (1829). Delineations of the north western division of the county of Somerset, and of its antediluvian bone caverns: with a geological sketch of the district. Published by the author, Shaftesbury.

Sandwith, C.I. (1932). The adventive flora of the port of Bristol. Report of the Botanical Society and Exchange Club of the British Isles 10: 314-363.

Sandwith, C.I. (1936). Bristol botany in 1935. Proceedings of the Bristol Naturalists’ Society Fourth Series, 8: 117-120.

Sandwith, C.I. (1939).  Bristol botany in 1938. Proceedings of the Bristol Naturalists’ Society Fourth Series, 8: 389-393.

Sandwith, C.I. (1941).  Bristol botany in 1940.  Proceedings of the Bristol Naturalists’ Society Fourth Series, 9: 89-92.

Sandwith, C.I. (1946). Bristol botany in 1945. Proceedings of the Bristol Naturalists’ Society 27: 70-78.

Sandwith, C.I. (1947). Bristol botany in 1946. Proceedings of the Bristol Naturalists’ Society 27: 149-159.

Sandwith, C.I. & Sandwith, N.Y. (1948). Bristol botany in 1947. Proceedings of the Bristol Naturalists’ Society 27: 203-208.

Sandwith, C.I. & Sandwith, N.Y. (1950). Bristol botany in 1949. Proceedings of the Bristol Naturalists’ Society 28: 19-20.

Sandwith, C.I. & Sandwith, N.Y. (1951). Bristol botany in 1950. Proceedings of the Bristol Naturalists’ Society 28: 169-175.

Sandwith, C.I. & Sandwith, N.Y. (1953). Bristol botany in 1952. Proceedings of the Bristol Naturalists’ Society 28: 305-314.

Sandwith, C.I. & Sandwith, N.Y. (1955). Bristol botany in 1954. Proceedings of the Bristol Naturalists’ Society 29: 17-24.

Sandwith, C.I. & Sandwith, N.Y. (1956). Bristol botany in 1955. Proceedings of the Bristol Naturalists’ Society 29: 101-108.

Sandwith, C.I. & Sandwith, N.Y. (1959). Bristol botany in 1955. Proceedings of the Bristol Naturalists’ Society 29: 423-432.

Sandwith, C.I. & Sandwith, N.Y. (1961). Bristol botany in 1960. Proceedings of the Bristol Naturalists’ Society 30: 107-112.

Sandwith, N.Y. (1921).  Some Bristol plants.  Journal of Botany 59: 21-22.

Sandwith, N.Y. (1962). Bristol botany in 1961. Proceedings of the Bristol Naturalists’ Society 30: 239-244.

Sell, P. & Murrell, G. (2009). Flora of Great Britain and Ireland: volume 3 Mimosaceae – Lentibulariaceae. Cambridge University Press, Cambridge.

Shiercliff, E. (1789). The Bristol and Hotwell Guide. Bulgin & Rosser, Bristol.

Smith, R., Hodgson, B. & Ison, J. (2016). A new flora of Devon. The Devonshire Association for the Advancement of Science, Literature and the Arts, Exeter.

St. Brody, G. (1856). The flora of Weston, and its immediate neighbourhood. Published by the author, Weston-super-Mare.

Stace, C.A. (1961). Nardurus maritimus (L.) Murb. in Britain.  Proceedings of the Botanical Society of the British Isles 4: 248-261.

Stace, C.A. ed. (1975). Hybridization and the flora of the British Isles. Academic Press, London.

Stace, C. (2010). New flora of the British Isles. 3rd ed. Cambridge University Press, Cambridge.

Stace, C.A., Preston, C.D. & Pearman, D.A. (2015).  Hybrid flora of the British Isles. Botanical Society of Britain and Ireland, Bristol.

Stewart, A., Pearman, D.A. & Preston, C.D. eds. (1994). Scarce plants in Britain. Joint Nature Conservation Committee, Peterborough.

Stroh, P.A., Leach, S.J., August, T.A., Walker, K.J., Pearman, D.A., Rumsey, F.J., Harrower, C.A., Fay, M.F., Martin, J.P., Pankhurst, T., Preston, C.D. & Taylor, I. (2014). A vascular plant red list for England, Botanical Society of Britain & Ireland, Bristol.

Stroh, P.A., Walker, K.J., Humphrey, T.A., Pescott, O.L. & Burkmar, R.J. (2023). Plant Atlas 2020: mapping changes in the distribution of the British and Irish flora. Botanical Society of Britain and Ireland, Durham & Princeton University Press, Princetown and Oxford.

Swete, E.H. (1854). Flora Bristoliensis. Van Voorst, London.

Taylor, I. (1990). Rare plant survey of south west England. Volume five – Avon. Unpublished report for Nature Conservancy Council.

Teesdale, I. (2008).  Fumitories in Kintyre – and a species new to Scotland.  BSBI Scottish Newsletter 30: 22-25.

Thompson, H.S. (1929). The vegetation of Berrow Flats, Somerset.  Annual Report and Proceedings of the Bristol Naturalists’ Society 7: 35-40.

Turner, D. & Dillwyn, L.W. (1805). The botanist’s guide through England and Wales. Phillips & Farden, London.

Turner, W. (1568). A new herbal, the thirde parte. Arnold Birckman, Cologne.

Vize, J.E. (1890). Teratology. Transactions of the Woolhope Naturalists’ Field Club (1890): 115-121.

Wallace, E.C. & Wilmott, A.J. (1942).  Plant records. Report of the Botanical Society and Exchange Club of the British Isles 12: 265-307.

Watson, H.C. (1835). The new botanist’s guide to the localities of the rare plants of Britain.  Longman & co., London.

Watson, H.C. (1837). Supplement to the new botanist’s guide to the localities of the rare plants of Britain. Longman & co., London.

Watson, H.C. (1874). Topographical botany.  Part 2.  Newman, Thames Ditton.

Watson, H.C. (1883). Topographical botany: being local and personal records towards shewing the distribution of British plants traced through the 112 counties and vice-counties of England, Wales, and Scotland.  Second edition. B. Quaritch, London.

Watson, W. (1915). A Somerset heath and its bryophytic zonation. New Phytologist 14: 80-93.

Watson, W. (1947) The Botanical Section. Proceedings of the Somerset Archaeological and Natural History Society 92: 97-101.

Webster, M.A. & Crouch, H.J. (2012).  Monitoring the fate of Glaucium flavum (Yellow Horned-poppy) at Sand Bay, North Somerset.  BSBI News 119: 28-31.

White, J.W. ed. (1881). Flora of the Bristol coal-field. Part I Thalamiflorae. James Fawn & Son, Bristol.

White, J.W. ed. (1882). Flora of the Bristol coal-field. Part II Calyciflorae. James Fawn & Son, Bristol.

White, J.W. ed. (1883). Flora of the Bristol coal-field. Part III Corolliflorae. James Fawn & Son, Bristol.

White, J.W. ed. (1884). Flora of the Bristol coal-field. Part IV Monochlamydeae. James Fawn & Son, Bristol.

White, J.W. ed. (1886). Flora of the Bristol coal-field. Part VI Glumiferae, Gymnospermae et Cryptogamae Vasculares. James Fawn & Son, Bristol.

White, J.W. (1905).  Bristol field-botany in 1901.  Proceedings of the Bristol Naturalists’ Society New Series 9: 123-147.

White, J.W. (1906). Prunella laciniata L. in Britain. Journal of Botany 44: 365-366.

White, J.W. (1912). The flora of Bristol. John Wright & Sons, Bristol.

White, J.W. (1915). Bristol botany in 1914. Annual Report and Proceedings of the Bristol Naturalists’ Society Fourth Series, 4: 138-142.

White, J.W. (1919). Bristol botany in 1917. Annual Report and Proceedings of the Bristol Naturalists’ Society Fourth Series, 5: 39-45.

White, J.W. (1922). Bristol botany in 1920-21. Annual Report and Proceedings of the Bristol Naturalists’ Society Fourth Series, 5: 197-201.

White, J.W. (1923). Bristol botany in 1922. Annual Report and Proceedings of the Bristol Naturalists’ Society Fourth Series, 6: 173-178.

White, J.W. (1925). Bristol botany in 1924. Annual Report and Proceedings of the Bristol Naturalists’ Society Fourth Series, 5: 263-267.

White, J.W. (1927). Bristol botany in 1926. Annual Report and Proceedings of the Bristol Naturalists’ Society Fourth Series, 6: 312-317.

White, J.W. (1928). Bristol botany in 1927. Annual Report and Proceedings of the Bristol Naturalists’ Society Fourth Series, 6: 380-383.

White, J.W. (1929). Bristol botany in 1928. Annual Report and Proceedings of the Bristol Naturalists’ Society Fourth Series, 7: 51-55.

Wiggington, M.J. (1999). British red data books 1 vascular plants.  Joint Nature Conservation Committee, Peterborough.

Willis, A.J. (1966). Bristol botany in 1965.  Proceedings of the Bristol Naturalists’ Society 31: 131-139.

Willis, A.J. (1968). Bristol botany in 1967.  Proceedings of the Bristol Naturalists’ Society 31: 351-360.

Willis, A.J. (1971). Bristol botany in 1970. Proceedings of the Bristol Naturalists’ Society 32: 13-21.

Willis, A.J. (1972). Bristol botany in 1971. Proceedings of the Bristol Naturalists’ Society 32: 97-104.

Willis, A.J. (1974). Bristol botany in 1973. Proceedings of the Bristol Naturalists’ Society 33: 17-30.

Willis, A.J. (1975). Bristol botany in 1974. Proceedings of the Bristol Naturalists’ Society 34: 13-22.

Willis, A.J. (1978). Bristol botany in 1976. Proceedings of the Bristol Naturalists’ Society 36: 15-29.

Willis, A.J. (1980a). Ophrys apifera Huds. x O. insectifera L., a natural hybrid in Britain. Watsonia 13: 97-102.

Willis, A.J. (1980b).  Bristol botany in 1978. Proceedings of the Bristol Naturalists’ Society 38: 33-48.

Willis, A.J. (1981). Bristol botany in 1980. Proceedings of the Bristol Naturalists’ Society 40: 98-111.

Willis, A.J. (1982). Bristol botany in 1981. Proceedings of the Bristol Naturalists’ Society 41: 81-90.

Willis, A.J. (1984). Bristol botany in 1982. Proceedings of the Bristol Naturalists’ Society 42: 99-107.

Willis, A.J. (1986). Bristol botany in 1984. Proceedings of the Bristol Naturalists’ Society 44: 61-70.

Willis, A.J. (1987). Bristol botany in 1985. Proceedings of the Bristol Naturalists’ Society 45: 53-61.

Willis, A.J. (1991). Bristol botany in 1989. Proceedings of the Bristol Naturalists’ Society 49: 31-42.

Willis, A.J. (1995). Bristol botany in 1993. Nature in Avon (Proceedings of the Bristol Naturalists’ Society)53: 35-46.

Willis, A.J. (1999). Bristol botany in 1996. Nature in Avon (Proceedings of the Bristol Naturalists’ Society) 56: 41-51.

Willmott, A.J. (1942).  Some remarks on British RhinanthusReport of the Botanical Society and Exchange Club of the British Isles 12: 361-379.

Wilson, P. & King, M. (2003).  Arable plants – a field guide.  English Nature and WildGuides.

Withering, W. (1796). Botanical arrangement of British plants. 3rd ed. Swinney, London.

Yemm, E.W. (1961). South-west regional meeting, 1960. Lectures: The development and ecology of the salt marsh at Berrow.  Proceedings of the Botanical Society of the British Isles 4: 209.

Yeo, P.F. (1956). Hybridisation between diploid and tetraploid species of Euphrasia.  Watsonia 3: 253-269.