NITELLA HYALINA. 127 



10. Nitella hyalina Agardh. 

 (Plate XVI.) 



Chara hyalina Db Candolle Flore Tran^aise, V, p. 247 (1815) ex parte. 

 Beaun in Ann. Sc. Nat. ser. 2, I, p. 351 (1834) ; in Flora, XVIII, i, 

 p. 54 (1835). 

 C. condensata and C. interrupta RtrpuECHT Symb. Hist. PI. Ross. 



pp. 78-79 (1845), /de Braun. 

 Nitella hyalina Agaedh Syst. Alg. p. 126 (1824) ex parte. 



KuTZiNG Phyc. Germ. p. 256 (1845) ; Sp. Alg. p. 516 (1849) ; Tab. 



Phyc. VII, t. 35, f. 2 (1857). 

 Rabbnhoest Deiitscli. Krypt. Fl. II, p. 196 (1847). 

 Bbattn in N. Denks. Scbweiz. Ges. Naturw. X, p. 10 (1849) ; in 



Monatsb. Akad. Berl. for 1867, p. 889 (1868). 

 Wallman Porsok syst. Charac. p. 16 (1853) ; Transl. p. 14 (1856). 

 SToRBSTBDT in Bot. Notiser, 1863, p. 39 (1863). 

 Leonhaedi in Verb. Naturf. ver. Briinn, II, p. 174 (1864). 

 Wahlstedt Mon. Sver. & Norg. Charac. p. 20 (1875). 

 MiJLLEB in Bull. Soc. Bot. Geneve, II, p. 54 (1881). 

 Beatjst & NoRDSTBDT Pragm. Mon. Charac. p. 78 (1882). 

 Stdow Europ. Charac. p. 31 (1882). 

 MiGiTLA Die Oharaceen, p. 190, f. 55-57 (1890) ; Syn. Charac. Eui'op. 



p. 49, f. 43-45 (1898). 

 Geovbs in Joum. Bot. XXXVI, p. 411, t. 392 (1898). 

 Eeust in Viert. Faturf. Ges. Zurich, XLIX, p. 64, t. 8 (1904). 

 Peospee Carofit. Espaii. p. 76, f. 13a (1910). 

 Hy ia Biill. Soc. Bot. France, LX, Mem. 26, p. 19 (1913). 



ExsiccATA:— Braun, Rab. & Stiz., 21, 31, 107; Desmazieres, II, 324; 

 Erbar. Critt. Ital., ii. 552; Groves, 53; Jack, Lein. & Stiz., 205; 

 Nordstedt & Wahlst., 18; Rabenhorst, 31 {fide Sydow), 419; Wart- 

 mann & Schenk, 250. 



Monoecious. Stem slender ; internodes 2-4 times the 

 length of the branchlets. Whorls of usually 8 primary 

 branchlets, with about double that number of shorter 

 and simpler secondary branchlets in two series, the 

 one above, the other below, the primary branchlets. 

 Primary branchlets 2-3 times furcate ; primary rays 

 usually -j-f the total length of the branchlet; secon- 

 dary rays 7-10 (of which 1-3 are usually simple); 

 tertiary rays 4—7, of which 1-2 are sometimes again 

 divided in 4-5 quaternary rays. Ultimate rays uni- 

 formly 2-celled, the lower cell gradually narrowing to 

 the base of the apical cell ; apical cell narrowly conical, 

 acute, c. 90-140ju- long, 30-45 /a broad at its base. 

 Accessory branchlets usually one above and one below 

 each primary branchlet, those of the lower series once 



