12 BEITISH CHAROPHYTA. 



Ganteeee OsteiT. Uhar. p. ]3, t. 1, f. 6 (1847). 



KxJTZiNG Sp. Alg. p. 520 (1849) ; 'J'ab. Phyo. VII, t. 43, f. 1 (1857). 



Leonhakdi in Verb, naturf. ver. Briinn, II, p. 179 (1864). 



MiJLLEE in Bull. Soc. Bot. Geneve, II, p. 59 (1881). 



Beaun & NoEDSTEDT Pragm. Mon. Gharac. p. 108 (1882). 



Stdow Europ. Charac. p. 48 (1882). 



CossoN & Germain Atl. Fl. Par. ed. 2, t. 44 (1882). 



MiQULA Die Ohavaoeen, p. 321, f. 81-3 (1890) ; Syn. Gharac. Europ. 

 p. 72, f. 68-9 (1898). 



Filaesky-Nandoe Gharac. Ungai-n, pp. 53 & 121 (1893). 



Peospbe Carofit. Espan. p. 100, t. 18a (1910). 

 Charopsis Braunii Ktitzing Phyc. Gen. p. 319 (1843) ; Phyc. Germ, 

 p. 257 (1845). 



Hy in Bull. Soc. bot. Prance, LX, Mem. 26, p. 25 (1913). 

 Chara Stalii Mbnbghini in Atti Sc. Ital. Genov. 1846, p. 553. 



VisiANi Fl. Dalm. Ill, p. 334 (1852). 

 Nitella Braunii Rabenhorst Deutsch. Krypt.-fl. II, p. 197 (1847). 



In addition to the synonyms above quoted, several specific names 

 have been given to extra-European forms of this species. 



BxsiccATA :— Billot 2995; Braun, Rabenh. & Stiz. 10, 64; Erbar. 

 Gritt. Ital. 604 ; Groves 45 ; Lloyd 413 ; Migula, Sydow & Wahlst. 

 129; Nordstedtcfe Wahlst. 87; Rabenhorst 279 ; Schultz 600 & 600 6is. 



MoncBcious. Stem moderately stout, the internodes 

 usually about the same length as the branchlets. Cortex 

 entirely absent. Whorls of 8-10 branchlets. Stipu- 

 lodes corresponding in number and alternating with the 

 branchlets, spreading, variable in size, usually well-deve- 

 loped, strongly acuminate. Branchlets nearly straight 

 or somewhat incurved, of 4-5 segments, the lower 3-4 

 elongated, the uppermost very short, hardly longer than 

 the surrounding bract-cells, acuminate. Bract-cells 

 variable in number, but apparently normally 5, some- 

 times all well-developed, sometimes only the anterior 

 pail', usually falling short of the oogonium. Bracteoles 

 usually resembling the anterior bract-cells. Oogonia 

 and antheridia produced at the two or three lowest 

 nodes, frequently geminate, occasionally three together. 

 Oogonium c. 525-650 pi long, 400-450 [i thick ; spiral- 

 cells showing about 9-10 convolutions ; coronula c. 150 ^ 

 high, 200 [I broad at the base, somewhat spreading, 

 the cells ovoid conical with rounded apex. Oospore 

 ellipsoid-cylindrical, c. 450-550 \x long, 275-300 n thick, 

 becoming almost black, showing about 7-9 inconspicuous 



