62 BRITISH CHAROPHYTA. 



C.fragilis Desvaux in Loiseleub Notice aj. F. Trance, p. 137 (1810). 

 Reichenbach Fl. Germ. Excurs. I, p. 149 (1830). 

 Beaun in Ann. sc. Nat. ser. 2, 1, p. 356 (1834) ; in Flora, XVIII, i, 



p. 68 (1835) ; in N. Denks. Schweiz. Ges. Naturw. X, p. 21 (1849) ; 



Consp. Char. Enr. p. 7 (1867) ; in Monatsb. Akad. Wiss. Berlin 



for 1867, p. 938 omn. pro parte ; in Colin, Krypt Fl. ScUes. I, 



p. 410 (1876). 

 CossoN & Germain Atl. Fl. Par. t. 38, f. c (1845); ed. 2, t. 42, f. 



c (1882). 

 KiiTziNG Phyc. Germ. p. 257 (1845) pro parte ; Sp. Alg. p. 521 (1849) 



pro parte; Tab. Phyc. VII, t. 54 (1857). 

 Gantbeee Oesterr. Char. p. 20 (1847) pro parte. 

 Rabenhoest Deutsch. Krypt. Fl. II, p. 199 (1847) pro parte. 

 Babington in Ann. and Mag. Nat. Hist. ser. 2, V, p. 91 (1850) pro 



parte. 

 Wallman Forsok. syst. Charac. p. 101 (1853) ; Transl. p. 84 (1856). 

 Wahlstedt Bidr. Skand. Charac. p. 38 (1862) pro parte; Mon. 



Sver. and Norg. Charac. p. 86 (1875) pro parte. 

 NoEDSTEDT in Bot. Notiser 1863, p. 43 pro parte, 

 Ceepin in Bull. Soc. Not. Belg. II, p. 126 (1863). 

 Leonhaedi in Verb, natiirf . Ver. Briinn, II, p. 207 (1864) pro parte. 

 Langb in Flora Danica 2797, f. 1-2 (1869). 



Geovbs in Journ. Bot. XVIII, p. 101, t. 207, f. 1 (1880) pro parte. 

 J. MuLLBE in Bull. Soc. Bot. Geneve, II, p. 89 (1881), pro parte. 

 Beattn & NoEDSTBDT Fragm. Mon. Charac. p. 181 (1882). 

 Sydow Europ. Charac. p. 94 (1882). 

 MiGULA Characeen, p. 722, f. 146-7 (1897) ; Krypt. Fl. Deutsch. II, 



ii, p. 353, t. 78, f . 1-3 (1907) ; Syn. Charac. Europ. p. 158, f. 131-2 



(1898). 

 HoLTZ Charac. in Krypt. Mark Brandenb. IV, i, pp. 113, 115 



(1903). 

 Peospee Carofit. de Espan. p. 164, f. 27 (1910) pro parte. 

 Hy in Bull. Soc. Bot. France, LX, Mem. 26, p. 42 (1913) pro parte. 

 C. pulchella Walleoth Annus Botanicus, p. 184, t. 2 (1815). 

 Agaedh Syst. Alg. p. 129 (1824). 

 Beekeley in Engl. Bot. Suppl. Ill, No. 2824 (1843). 

 Beetoloni Fl. Ital. X, p. 13 (1854). 

 C. hirta Mbyen in Linnsea, II, p. 78 (1827). 

 C.fulcrata Gantbeee Oesterr. Char. p. 20, t. 2, f. 16 (1847). 



ExsiccATA : — Braiin, Rabenh. & Stiz. 13, 15 ; Desmazieres II, 331 ; 

 Erbar. Critt. Ital. II, 258; Groves 31; Jack, Lein. & Stiz. 207a, 6; 

 Migula, Syd. & Wahlst. 45, 47-8, 71-3, 95-8, 100-2 ; Nordst. & Wahlst. 

 116-18 ; Rabenhorst 140, 280 ; Reichenbach 94 ; Westendorp & Wall. 

 899 ; Gr. & B.-W. 82. 



Monoecious. Stem rather slender (diam. c. 750 n), 

 the internodes as long as or exceeding the branchlets ; 

 occasionally producing irregular multicellular bulbils. 

 Cortex regular, the cells of the secondary nearly or quite 

 as broad as those of the primary series ; spine-cells 

 extremely small, hardly visible except on very young 

 internodes. Whorls of 7-8 branchlets. Stipulodes nor- 



