100 BRITISH CHAEOPHYTA. 



i 



N. pedunculata AGARDH Sjst. Alg. p. xxvii (1824), fide Braun. 



C. syncarpa AUCT. PLUR. (non Tliuill.). 

 REICHENBACH Iconogr. f. 1078-1079 (1830). 

 BABINGTON in Ann. and Mag. Nat. Hist. ser. 2, V, p. 83 (1850). 



C. capitata var. opaca BRAUN in Ann. Sc. Nat. ser. 2, I, p. 352 (1834). 

 C. syncarpa var. pseudo-flexilis BRAUN in Flora, XVIII, i, p. 51 (1835). 



GANTERER Osterr. Char. p. 9 (1847). 



C. syncarpa var. opaca BRAUN in Flora, XVIII, i, p. 52 (1835). 

 C. syncarpa var. Smithii COSSON, GERMAIN & WEDDELL, Introd. FI. 



Par. p. 151 (1842). 

 N. syncarpa var. Smitliii COSSON & GERMAIN, Fl. Par. p. 682 ; AtL 



t. 39, f. 7-12 (1845). 

 N. syncarpa var. opaca KUTZING Phyc. Germ. p. 256 (1845). 



BOSWELL Engl. Bot. ed. 3, XII, p. 178, t, 1900 (1884). 

 N. syncarpa vars. pseudoflexilis and opaca RABENHORST Deutsclu 



Krypt. Fl. II, p. 195 (1847). 



N. syncarpa vars. opaca, laxa, glomerata, and pachygyra BRAUN in N. 



Denks. Schweiz. Ges. Naturw. X, p. 7 (1849). 

 N. atrovirens WALLMAN Forsok syst. Cbarac. p. 35 (1853) ; Trans], 



p. 30 (1856). 



EXSICCATA : Areschong, 149 ; Billot, 3272 ; Braun Rab. & Stiz., 29, 

 51-53, 77, 105, 106 ; Groves, 28, 29, 60 ; Migula Syd. & Walilst., 33 y 

 34, 52; Mougeot & Nestl., 1278; Nielsen, 4 (fide Wahlst.) ; Nord- 

 stedt & Wahlst., 5-7 ; Westendorp & Wall., 139 



7 



Dioecious. Stem moderately stout ; internodes 

 usually 2-4 times the length of the branchlets. Sterile 

 whorls of 6-7, simple or once forked, usually mode- 

 rately stout branchlets. Secondary rays 2-3, 1-celled,, 

 about -5 f the length of the primary, usually bluntish 

 with mucronate tips, sometimes acuminate. Fertile 

 'irJiorls usually with shorter branchlets forming more 

 or less dense heads, but sometimes lax, the branchlets 

 once forked, with 1 -celled secondary rays. Oogonia 

 solitary or geminate, c. 650-700 p. long, c. 500-565 p. 

 broad; spiral cells showing about 7-9 convolutions, 

 swelling considerably at the apex ; coronula 25-40 p. 

 high, deciduous. Oospore spheroidal, sometimes even 

 broader than long, c. 375-425 p. long, 350-400 p. 

 broad, 250 /A thick, dark chestnut-brown to almost 

 black, showing about 7 low, rather thick ridges 

 often broadening into flanges at the apex ; outer 

 membrane thick and semi-rigid, transparent or semi- 

 opaque, strong red-brown or yellow -brown, smooth 



