MONOBLEPHARIDALES 717 



Gonapodya prolifera (Cornu) Fischer 



Rabenhorst. Kryptogamen-Fl., 1(4): 382. 1892 

 (Fig. 54 B, D, F, p. 738) 



Monoblepharis prolifera Cornu, Bull. Soc. Bot. France, 18: 59. 1871; Ann. 



Sci. Nat. Bot., V, 15: 16. 1872; in van Tieghem, Traite de Botanique 



(1874 ed.), fig. 167 B, 5. Paris. 

 Saprolegnia siliquaeformis Reinsch, Jahrb. wiss. Bot., 11: 293, pi. 15, figs. 



12-13. 1878. 

 Gonapodya siliquaeformis (Reinsch) Thaxter, Bot. Gaz., 20: 480, pi. 31, figs. 



6-10. 1895. 

 Gonapodya bohemica Cejp, Bull. Soc. Mycol. France, 62(3-4): 10. 1946. 



(Separate) 



Mycelium composed of hyphae more or less regularly divided by 

 pseudosepta into short-elliptical to long-clavate segments, copiously and 

 successively subumbellately branched, the branches diverging in a dense 

 tuft from a common base; sporangia once to many times proliferous, 

 the secondary sporangia only slightly exserted, long, pod-shaped, in- 

 flated below, the sometimes very elongate distal portion tapering grad- 

 ually to a blunt apex, borne sessile on the terminal cell of a branch or 

 separated from it by a clearly defined constriction; zoospores variable 

 in number, up to fifty or more in a sporangium, posteriorly uniflag- 

 ellate, elliptical, or somewhat cylindrical; male and female gametangia 

 once to at least five times proliferous, successive gametangia progres- 

 sively smaller, borne singly or in small groups on the terminal cell of a 

 branch and separated from it by clearly defined constrictions; female 

 gametangia elongate-ovoid, inflated below, tapering abruptly or grad- 

 ually to a blunt apex, forming a single discharge papilla, 60-180 by 

 25-35 \i, female gametes variable in number, up to twenty in a game- 

 tangium, globose, nonflagellate, 15-19 (ji in diameter; male gametangia 

 smaller and more slender than the female, forming a single discharge 

 papilla, 40-107 by 10-15 \x, male gametes variable in number, up to 

 forty in a gametangium, posteriorly uniflagellate, elliptical or somewhat 

 cylindrical, with a conspicuous anterior cluster of refractive granules, 

 7-10 by 3-6 \x, flagellum 22-24 \x in length; zygote retaining the flagellum 

 of the male gamete, at first amoeboid and with varying shape, charac- 

 teristically with a hyaline anterior pseudopodium, finally actively motile, 



