A RKVIKW OF THE BRITISH CHARACE.E. 165 



distributed in Europe and Africa, occurring also in Asia and North 

 and South America. 



in. N. mucronata, Kiitz. Phyc. Germ. (1845), p. 256 ; Tab. 

 Phyc, vii., t. 33, f. 1; Coss. & Germ. Atl. Flor. Par., t. 40 d ; 

 Wallm, Act. Stockh., 1854, p. 253; Braun, Consp. Char. Europ., 

 p. 2; Braun, B. & S. Exs. 20, 30; Nordst. & Wahlst. Exs. 82. 



Chora furcata, Amici Deser. di alcune sp. nuove di Chara 

 (1827), p. 14, t. v., f. 2 (not Bruz.). 



Cflexilis, "L," Beichenb. Icon. Bot., f. 1071-2. 



C. mucronata, Braun, Ann. Sc. Nat., 1834, p. 351 ; Gant. 

 Oesterr. Char., p. 9 ; Bab. A. N. H., v. (1850), p. 84. 



O. Barbieri, Balsamo-Crivelli, Biblioteca Italiana, vol. 97 

 (1840), p. 190. 



C.norvegica, "Wallm. Act. Stockh., 1854, p. 252. 



C. breri'andis, Bertol. Flora Italica, vol. x. (1854), p. 19. 



Stem rather stout, moderately branched. Whorls of 5-6 stout 

 branchlets. Branchlets 1-2- , rarely 3-, times divided into 2-4 

 rays. Ultimate rays 2-celled, the upper cell usually short, conical, 

 acute. Nucules oval, 7-8-striate. Monoecious. (Tab. 210, f. 16.) 



A dark green plant, 6-12 in. high, often in its laxer forms 

 resembling A r . fUmlis, from which it differs by its 2-celled ultimate 

 rays. It is closely allied to N. gracilis, but is stouter, more rigid, 

 and the branchlets are less divided. Generally distributed in 

 Europe, and occurring in Asia, North Africa and North America ; 

 discovered in Britain by Mr. Borrer, in a ditch at West Grinstead, 

 West Sussex, but has not since been found. Our figure is taken 

 from Borrer's specimen, which is near the var. heteromorpha, Braun, 

 Flora, 1835, i., p. 52. 



iv. N. translucens, Ag. Syst. Alg. (1824), p. 124 ; Coss. & 

 Germ. Atl. Flor. Par., t. 40 b; Wallm. Act. Stockh., 1854, 

 p. 259; Kiitz. Tab. Phyc, vii., t. 26, f . 1 ; Braun, Consp. Char. 

 Europ., p. 2; Braun, B. & S. Exs. 19; Nordst. & \\ahlst. 



Exs. 81. 1QC _ 



C. translucent, Pers. Syn. (1807), ii., p. 531; Sm. E. B., 185o 

 (1808); Bruz. Obs. Char., p. 22; Hook. Brit. Flora, u., p. 245; 

 Bab. A. N. H., v. (1850), p. 84. 



Stem usually stout. Sterile whorls of 4-6 usually once divided 

 branchlets; rays 2-4, very minute, 2-celled. Fertile whorls wry 

 mall and dens, ; branchlets 6-8, once or twice divided. Nucules 

 small clustered, strongly 7-8-striate. Monoecious. (Tab. 210, 



f. 17.) 



Our largest NittUa, sometimes 4-5 feet high, of a bright green. 

 The very minute rays which appear as small points on the primary 

 joint immediately separate this from all our other species. It is a 

 rare species, occurring in Western and Southern Europe, but 

 reaching to Germany and South Sweden, also to North Africa. 

 It is not uncommon in the South of England. 



Ponds, pools, canals, and (rarely) streams. July. Cornwall, 

 W.; Hants, S. ; Sussex, W. ; Surrey; Essex, S.; Herts; 



