The Characeae or stoneworts are a family of green algae. This is a partial list of species found in Britain and Ireland.

British Isles Ref: Stewart & Church (1992). Chara baltica Bruz. Chara canescens Desv. & Lois. Chara connivens Salzm. ex A.Braun Chara curta Nolta ex Kütz. (=C. aspera var. curta) Chara denudata (A.Braun) R.D.Wood Chara fragifera Durieu Chara intermedia Braun (=C. papillosa Kütz. and C. contraria x hispida) Chara mucosa J.Groves & Bullock-Webster Chara rudis (A.Braun) Leonh. Chara tomentosa L. Lamprothamnium papulosum (Wallr.) J.Groves Nitella capillaris (Krocker) J.Groves & Bullock-Webster Nitella gracilis (Smith) Agardh Nitella hyalina (DC.)Agardh Nitella mucronata (A.Braun)Miquel Nitella spanioclema J.Groves & Bullock-Webster (Nitella flexilis var. spanioclema (J.Groves & Bullock-Webster)) Nitella tenuissima (Desv.) Kütz. Nitellopsis obtusa (Desv.) J.Groves Tolypella intricata (Trent. ex Roth) Leonh. Tolypella nidifica (O.F.Müll.) Leonh. (=Tolypella nidifica var. nidifica) Tolypella prolifera (Ziz. ex A.Braun) Leonh.

Ireland County AntrimMorton, O. 1992 in Hackney, P. (Ed.) Stewart & Corry's Flora of the North-east of Ireland. Institute of Irish Studies and The Queen's University of Belfast (HB) Chara aspera var. aspera Chara globularis var. globularis Chara vulgaris var. papillata Wallr. ex A. Braun Chara globularis var. virgata (Kützing) R.D.Wood Chara vulgaris var. vulgaris Chara vulgaris var. contraria (A.Braun ex Kützing) J.A. Moore Chara vulgaris var. longibracteata (Kützing) J. Groves & Bullock-Webster Chara vulgaris var. papillata Wallr. ex A. Braun Nitella flexilis var. flexilis Nitella translucens (Pers.) C.A. Ag. Tolypella nidifica var. glomerata (Desv.) R.D.Wood County Down Chara aspera var. aspera Chara aspera var. curta (Nolte ex Kützing) Braun ex Leonh. Chara globularis var. globularis Chara vulgaris var. papillata Wallr. ex A. Braun Chara globularis var. virgata (Kützing) R.D.Wood Chara globularis var. annulata (Lilleblad) J.A.Moore Chara hispida L. Chara hispida var. hispida Chara hispida var. major (Hartm.) R.D. Wood Chara hispida var. rudis A. Braun Chara pedunculata Kützing Chara vulgaris var. vulgaris Chara vulgaris var. contraria (A.Braun ex Kützing) J.A. Moore Chara vulgaris var. longibracteata (Kützing) J. Groves & Bullock-Webster Chara vulgaris var. papillata Wallr. ex A. Braun Nitella flexilis var. flexilis Nitella translucens (Pers) C.A. Ag. Tolypella nidifica var. glomerata (Desv.) R.D.Wood County Londonderry Chara aspera Deth. ex Willd. var. aspera Chara vulgaris var. papillata Wallr. ex A. Braun Chara globularis var. globularis Chara globularis var. virgata (Kützing) R.D.Wood Chara hispida L. Chara hispida var. hispida Chara vulgaris var. vulgaris Chara vulgaris var. contraria (A.Braun ex Kützing) J.A. Moore Chara vulgaris var. papillata Wallr. ex A. Braun Nitella flexilis var. flexilis Nitella translucens (Pers) C.A. Ag. Tolypella nidifica var. glomerata (Desv.) R.D.Wood County Mayo.Recent records have been published from Clare Island.Guiry, M.D., John, D.M., Rindi, F. and McCarthy, T.K 2007. New Survey of Clare Island, Volume 6: The Freshwater and Terrestrial Algae. Royal Irish Academy. Chara virgata Kützing Nitella flexilis (Linnaeus) C.Agardh Nitella translucens (Persoon) C.Agardh

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