13G BRITISH CHAEOPHYTA. 



Langb in Fl. Danioa, t. 2800 (1869). 



BoswELL Engl. Bot. ed. 3, XII, p. 185, t. 1905-6 (1884). 

 C. glomerulifera Rupbecht Symb. Hist. Pi. Ross, p. 75 (1845). 

 N. glomerulifera Wallman Porsok syst. Oliarac. p. 42 (1853) ; Transl. 



p. 36 (1856). 

 C. Smithii and C. prolifera Babington in Ann. & Mag. Nat. Hist. ser. 

 2, V, pp. 86-7 (1850). 



Johnson Fern Allies, p. 44-45, t. 26 (1855). 

 N. Smithii Wallman Tovsok syst. Charac. p. 43 (1853) ; Transl. p. 36 



(1856). 

 Tolypella glmnerata Leonhaedi in Lotos, XIII, p. 57 (1863) ; in Vei-h. 

 naturf. vei-. Briinn, II, p. 176 (1864). 



Wahlstedt Mon. Sver. & N"org. Ohavao. p. 22 (1875). 



Geovbs in Joum. Bot. XVIII, p. 162, t. 209, f. 11 (1880). 



Beatjn & NOEDSTEDT Pragm. Mon. Charac. p. 95 (1882). 



Sydo-w J}urop. Charac. p. 35 (1882). 



MiGTJLA Die Oharaoeen, p. 227, f. 64 (1890) ; Syn. Charac. Europ. p. 

 58, f. 52 (1898). 



HOLTZ Charac. in Krypt Mark-Brandenb. IV, i, p. 82 (1903). 



Pkospbe Carofit. Espan. p. 80, f. 13b (1910). 



Ht in Bull. Soc. bot. France, LX, Mem. 26, p. 20 (1913). 



ExsiccATA : — Areschoug 395; Braun, Rabenh., & Stiz. 17; Des- 

 mazieres II, 326 ; Fries XVI ; Groves, 47, 48 ; Migula, Sydow, & Wahlst. 

 128 ; Nielsen 12 & (fide Wahlstedt) 13 ; Nordstedt & Wahlst. 43-45 ; 

 Rabenhorst 459 (fide Sydow). 



MoncEcious. Stevi slender to moderately stout; 

 branches usually 2-6 at a node. Sterile whorls of 

 6-1 2 elongated simple 3-5-celled branchlets, the ulti- 

 mate cell more or less elongated and cylindrical, 

 obtuse. Fertile whorls usually in dense compound 

 heads of once-forked branchlets. Bays 4-5, unequal, 

 often tapering, usually strongly curved, the central 

 ray much the longest, the lateral usually 3 -celled, the 

 central 3-4-celled; ultimate cell cylindrical obtuse. 

 Oogonia and antheridia produced at the nodes of the 

 branchlets, and oogonia sometimes in great number also 

 at their base. Oogonia usually 2-6 together, often 

 stalked, ellipsoidal, c. 425-500 /x long, 310-375 /a 

 broad; spiral cells showing about 9-10 convolutions, 

 usually swelling at the apex ; coronula 35-50 /a bigh, 

 65-90 fj. broad, usually deciduous. Oospore usually 

 ellipsoidal, yellow to orange-brown or cold dull brown, 

 c. 300-375 fjL long, 250-300 ^ broad, showing 7-9 

 thin, low ridges ; outer membrane thick and semi-rigid, 



