244 Karl E. Hirn. 



132. Oe. acrosporum De Bary char. einend. 



1854 De Bary (I) p. 47, 60-64, 94, t. 3, f. 1—12; 1868 Rabenhorst p. 351; 

 1870 Wittrock (I)" p. 126; 1874 Wittrock (IV) p. 26; 1877 Nordstedt (I) p. 28; 

 1878 Kirchner (I) p. 55; 1884 Will.e (II) p. 25, t. 1, f. 45; (1884 Cooke p. 163, 

 t. 61, f. 2); 1889 De Toni (I) p. 58; 1895 Lemmermann (II) p. 27; 1895 Hirn 

 (I) p. 17; 1896 Hirn (II) p. 2. 



Exs. 1893 in Wittr. et Nordst. Alg. exs. Fase. 24, N:o 1101 sub nom. Oe. 

 acrosporum De Bar. f. connectens Wittr. (immixt.); 1898 in Phycoth. Bor.-Amer. 

 Fase. IX, N:o 409 sub nom. Oe. acrosporum De Bar. f. connectens Wittr.; Rourne- 

 guere, Alg. exs. N:o 246 sub nom. Oe. Vaucherii A. Br. ß pulchellum (immixt.). 



Oe. dioieum, nannandrium, gynandrosporum vel (sec. De Bary 1. c. p. 63) 

 idioandrosporum ; oogonio solitario, terminali, ellipsoideo, in suprema parte cir- 

 cumscisso, operculo apicali, minimo, mox deeiduo (? vel evanescenti) ; naeinbrana 

 oogonii (jam ante feeeundationem) in latere interiore costis longitudinalibus, 

 interdum anastomosantibas instrueto; Oospora oogonium plane complenti, meni- 

 brana ejus cum menibrana oogonii coalita, duplici: episporio longitudinaliter co- 

 stato (in sectione optica transversali undulato), inter costas subtiliter transverse 

 striato, costis (in medio oosporse 23 — 30) subtilissime crenulatis, endosporio 

 laevi; cellulis suffultoriis tmnidis vel subtumidis; cellula fili basali forma, ut 

 vulgo, elongata, cellula terminali obtusa; androsporangiis 1 — 2-cellularibus, 

 hypogynis vel (sec. De Bary) in planus propriis, androsporangiiferis sedentibus; 

 nannandribus curvatis, in cellulis suffultoriis sedentibus, stipite interdum bi- 

 vel tricellulari, cellulis stipitis superioribus longissimis, antheridio exteriore, 

 1 — 2-cellulari ; 



crassit. cell, veget. (10 — ) 13— 21 (t, altit. 3 — 6 (-8)-plo major; 



„ suffult. 17—25 „, „ 1V 2 — 3- „ „ ; 



oogon. 38— 48 (—50),,, „ 50—63 t i 



„ cell, androsp. 16 — 21 „, „ 12 — 15 



„ „ infer. stip. nannandr. 9 — 12 „, „ 30 — 38 ( — 40),, 



„ „ super. „ „ 6—8 „, „ 55—71 



„ „ antherid. 6 — 8 ,, , „ 9 — 15 



Tab. XLI, Fig. 254. 

 Hab. in 



America austr.: ad Caldas civit. Minas Geraes Brasilia? (sec. Wille). America 

 bor.: Middlesex Fells in civit. Massachusetts. Asia: Mandschuria (Herb. Borge. 



T. XXVU. 



