NITELLA TLEXILIS. 103 



Ganteebe OsteiT. Char. p. 8 (1847). 



Babinqton in Ann. & Mag. Nat, Hist. sei-. 2, V, p. 83 (1850). 

 C. inermis pellucida Schmibdel Icones, p. .53, t. 14 (1762). 

 C.farculata Rbichenbach in Mossier, Handb. ed. 3, III, p. 1664 (1834). 

 C. Brongniartiana CossoN, Gbemain & Weddell Intr. Fl. Par. p. 152 



(1842). 

 C. commutata Rtjpeecht Symb. Hist. PL Ross. p. 77 (1845). 

 Nitella flexilis Agardh Syst. Alg. p. 124 (1824). 



KiJTziNG Phyc. Germ. p. 256 (1845) ; Sp. Alg. p. 514 (1849) ; Tab. 

 Phyc. VII, t. 32, f. 2 (1857). 



Rabbnhoest Deutsch. Krypt. PI. II, p. 195 (1847). 



Beaitn in N. Denks. Schweiz. Ges. Naturw. X, p. 8 (1849) ; in Cohn, 

 Krypt. Fl. Schles. 1, p. 397 (1876). 



Wallman Forsok syst. Charac. p. 33 (1853) ; Transl. p. 28 (1856). 



Wahlstbdt Bidrag Skand. Oharac. p. 4 (1862) ; Men. Sver. & Norg. 

 Charac. p. 16 (1875). 



Oeepin iu Bull. Soc. Bot. Belg. II, p. 129 (1863). 



Leosthaedi in Verb. Naturf. ver. Brvinn, II, p. 168 (1864). 



Langb in Flora Danioa, t. 2799 (1869). 



Groves in Joum. Bot. XVIII, p. 166, t. 210, f. 18 (1880). 



MuLLBR in Bull. Soc. Bot. Geneve, II, p. 51 (1881). 



Braun & NoRDSTEDT Fragm. Mon. Charac. p. 34 (1882), 



Sydow Europ. Charac. p. 17 (1882). 



BoswBLL Engl. Bot. ed. 3, XII, p. 174* (1884). 



MiGTJLA Die Cliaraoeen, p. 132, f. 37, 38 (1890) ; Syn. Charac. Europ. 

 p. 34, f. 25, 26 (1898). 



HoLTZ Characeen, in Krypt. Mark-Brandenb. p. 72 (1903). 



Prosper Carofit. Espan. p. 67, f. 10b (1910). 



Hy in BuU. Soc. Bot. France, LX, Mem. 26, p. 10 (1913), 

 N. Brongniartiana CossoN & Germ. Fl. Par. p. 682, Atl. t. 40, f,C. 



(1845) ; Atl. ed. 2, t. 46, f.D (1882). 

 N.furculata Noedstedt in Bot. Notiser, 1863, p. 35. 



ExsiccATA :— Areschoug, 48 (132) ; BUlot, 1988 ; Braiin Rabenh. & 

 Stiz., 22, 23, 54, 55 ; Desmazieres, II, 318 ; Groves, 26 ; Lloyd, 404 ; 

 Migula Syd. & Wahlst. 28-31; Mougeot & Nestl. 591; Nielsen, 5, 6 

 (fide Wahlst.) ; Nordstedt & Wahlst., 8, 11, 12, 13 ; Rabenhoi-st, 139 (?), 

 460; Schultz, IV, 92; Westendorp & Wall., 1096 & (fide Sydow) 

 1338-1339. 



Monoecious. Stem moderately stout ; the internodes 

 usually once and a half to twice the length of the 

 branchlets. IVhorls of 6-8 straight or slightly incurved 

 branchlets, the fertile usually similar to the sterile, but 

 sometimes shortened and forming heads. Branchlets 

 once furcate, or sometimes simple with one node ; 

 •primary rays usually about twice the length of the 



* The plate ascribed to N. flexilis (t. 1899) is not cited, being so inaccvirate 

 that it is impossible to identify it with any known species. The antheridia 

 and oogonia are represented as growing side by side, and all the sterile 

 branchlets as consisting of single cells. 



