276 Karl E. Hirn. 



verticillatis, rotundatis instructis, operculo apertis, circumscissione lata, supra 

 medium, a vertice visis orbicularibus, margine undulata (undulis circa 16 — 19); 

 oosporis subglobosis (vel subpyriforuii-globosis), partem inflatam oogoniorum 

 complentibus, membrana laevi; cellulis suffultoriis eadem forma ac cellulis vege- 

 tativis eeteris; cellulis vegetativis capitellatis ; nannandribus late oboviformibus. 

 unicellularibus, in oogoniis sedentibus; 



crassit. cell, veget. 18 — 22 ;*, altit. 3 — 7-plo major; 



,, oogon. 58 — 65 ., , ,, 67 — 78 f«; 



,, oospor. 48 — 53 ,, , ,, 48 — 53 ,, ; 



,, nannandr. 14 — 16 ,, , „ 15 — 20 ,, . 



Tab. XLVII, Fig. 300. 



Hab. in 



Fennia: Ab. ad Jantoniemi par. Lojo (Herb. M. Fenn.). 



Vgl. Oe. (Elandicum (N:o 148). 



151. Oe. platygynum Witte. 



1872 Wittrock (III) p. 1; 1874 "Wittrock (IV) p. 17, t. 1, f. 5—9; 1877 

 Nordstedt (I) p. 26; 1878 Kirchner (I) p. 53; (1884 Cooke p. 158, t. 59, f. 5); 

 1887 Wolle (III) p. 75, t. 77, f. 1-4 (fig. minus accurate facta!); 1889 De Toni 

 (I) p. 46; 1895 Hirn (I) p. 15; (?) Oe. platygynum Wittr. f. major West (I) 1891 

 p. 109, t. 18, f. 1 (vide infra). 



Exs. 1856 De Bary in Eabenh. Alg. Sachs, resp. M. Eur. N:o 518 sub 

 nom. Oe. Itzigsohnii De Bary; 1877 in Wittr. et Nordst. Alg. exs. Fase. 1, N:o 

 4 (imrnixt.) et N:o 17a; 1878 1. c. Fase. 4, N:o 151 (immixt.); 1883 1. c. Fase. 11, 

 N:o 507 (immixt.); 1896 in Wittr., Nordst. et Lagern. Alg. exs. Fase. 26, N:o 1218. 



Oe. dioieum, nannandrium, gynandrosporum et idioandrosporum ; oogoniis 

 singulis vel rarissime (sec. Wittrock) binis, depresse oboviformibus, in medio 

 processubus (plicis) verticillatis, rotundatis, raro obtuse rotundatis instructis, 

 operculo apertis, circumscissione infra medium, a vertice visis orbicularibus, 

 margine undulata (undulis 7 — 12, plerumque 8); oosporis depresso- vel subde- 

 presso-globosis, oogonia non plane complentibus, membrana lsevi; cellulis sufful- 

 toriis non vel paullulum tumidis; androsporangiis 1 — 3-cellularibus ; cellulis ve- 

 getativis levissime capitellatis; cellula fili terminali apice obtusa; nannandribus 

 unicellularibus, oboviformibus, minimis, in oogoniis sedentibus; 



T. xxvn. 



