LEPTO MIT ALES 879 



Apodachlya pyrifera Zopf 



Nova Acta Acad. Leop.-Carol., 52: 367, pi. 21, figs. 1-21. 1888 



(Fig. 69 E, p. 875) 



Leptomitus piri ferns Zopf, in Schenk, Handbuch d. Bot ,4: 299. 1890. 



Mycelium extensive, matted, sympodially branched, the segments 

 long or short, somewhat clavate distally, contents with one or two cel- 

 lulin bodies in each segment, especially near the constrictions; spo- 

 rangia terminal, single or in pairs, broadly obpyriform, citriform, fusi- 

 form, ovoid, or ellipsoidal, 12-24 (j. long by 12 20 \i in diameter, papilla 

 usually terminal or somewhat lateral, with or without a short discharge 

 tube; primary zoospores from six to twenty, encysting at the orifice or 

 swimming directly away, laterally biflagellate (secondary?) spores; 

 oogonium spherical, generally terminal, or lateral on a short segment 

 near a constriction, rarely intercalary, the antheridium suboogonial or 

 lateral; oospore spherical, filling the oogonium, with a thick smooth 

 double wall, contents with a large oil globule, germination not observed. 



On decaying Characeae, Zopf (he. cit), twigs, Hohnk (1935: 218), 

 substratum (?), Richter (1937), CejpM 1932b: l,pl. 1, figs. 6-9, pi. 2 

 figs. 4-6), Germany; twigs, H. E. Petersen (1909: 388; 1910: 526), Lund 

 (1934:33), Denmark; Thaxter (1896b: 325), birch twigs, Sparrow 

 (1933c: 532), United States; in soil, Wolf (1939: 384), Mexico; twigs 

 of Pyrus pashia, Shen and Siang (1948: 197, fig. 9), China. 



The species name was spelled "piriferus"" by Zopf in 1890 and 

 "pyrifera' in 1888. 



Apodachlya pyrifera f. macrosporangia, stat. nov. 



Apodachlya pyrifera var. macrosporangia Tiesenhausen, Arch. f. Hydrobiol. 

 u. Planktonk., 7(2):295, fig. 19a-c. 1912. 



Mycelium sparingly branched, hyphae 5—15 [jl in diameter, segments 

 70 430 \x long, mostly over 100 u. long; sporangia generally single, 

 terminal or on short lateral branches, pyriform or ellipsoidal, 35-63 \i 

 long by 14-36 \l in diameter, with a short apical or subapical discharge 

 tube, often collapsing after discharge; zoospores from four to twenty- 

 four, primary spores encysting at the orifice, the cysts 1 1 \x in diameter, 

 secondary spores spherical, 10-11 \x in diameter; oogonium spherical 



1 Czechoslovakia. 



