48 BRITISH CHAROPHYTA. 



NoRDSTEDT in Bot. Notiser 1863, p. 48. 



Leonhaedi in Verh. Naturf . Ver. Brunn, II, p. 199 (1864). 



Lange in Flora Danica, fc. 2746 (1867). 



Wahlstedt Sver. & Noi-g. Charao. p. 34 (1875). 



H. & J. Groves in Joum. Bot. XVIII, p. 131, t. 208, f. 6 (1880). 



MiJLLEE in Bull. Soc. Bot. Geneve, II, p. 63 (1881). 



Bbaitn & NoEDSTKDT Fragm. Monog. Cliaj-ac. p. 150 (1882). 



Stdow Burop. Charac. p. 61 (1882). 



Migttla Die Characeen, p. 476, f. 108-9 (1893) ; Krypt.-Fl. Deutsch. 



II, ii, p. 303, t. 70 (1907) ; Syn. Charac. Europ. p. 105, f. 93, 94 (1898). 

 HoLTz Charac. in Krypt. Mark.-Brandenb. IV, i, p. 101, text-fig. 



(1903). 

 Hy in Bull. Soo. Bot. France, LX, mem. 26, p. 36 (1913). 

 C. liispida var. polyacaniha Babington Man. Brit. Bot. ed. 7, p. 461 



(1874). 



ExsiccATA : — Areschoug 141 ; Braun, Rabe:ph. & Stiz. 48, 72, 97, 

 119; Desmazieres II, 335, Fries XIV, 100; Groves 10, 11; 

 Nielssen 41, 42, 57; Nordstedt & Wahlst., 78, 79, 80 a, 80 6; 

 Rabenhorst 48 ; Reichenbach 426 ; Migula, Sydow and Wahlst. 

 134-6. 



MoncEcious. Stem stout, usually with rather long 

 internodes. Cortex irregularly diplosticlious, the pri- 

 mary cells larger and more prominent than the secon- 

 dary, secondary cells often much overlapping ; spine- 

 cells strongly developed, usually in fascicles of 3-4, 

 spreading, long, slender, usually acuminate, persistent. 

 Whorls of 8-10 branchlets. Stipulodes of both series 

 well developed, long, slender, acuminate, often curved. 

 Branchlets straight or incurved, usually of 5-7 corticate 

 and 1-2 ecorticate segments. Bract-cells normally 5, 

 all well developed long and slender, anterior pair longer 

 than the fruit ; hracteoles often double as long as the 

 fruit, all acuminate. Oogonia and antheridia usually 

 solitary, produced at the lowest 3^ branchlet-nodes, 

 occasionally long-stalked. Oogonium c. 850-11 00 [x long 

 (excl. cor.), 575-6'75u broad ; spiral-cells showing 12-15 

 convolutions ; coronula c. 150 (x high, 300 [x broad. 

 Oospore nearly ellipsoid tapering slightly below, 650- 

 800 [x long, 325-475 (x broad, dark brown to almost 

 black, showing 11-14 low ridges, prolonged down- 

 wards into a cage ; outer membrane thick, semi-rigid, 

 translucent, dull brown, finely granulated with granules 

 of varying prominence. Antheridium c. 500 [x in 

 diameter. 



