Phylum：Oomycota　>>　Class： Oomycetes　>>　 Order： Saprolegniales 
   
 
　BCRC Number： NO BCRC Number!  
   
　Scientific Name： Achlya recurva
 
   
   
　Author：

Achlya recurva Cornu. Ann. Sci. Nat. Bot, ser. 5, 15:22. 1872.
   
 
 
 
 
　Description： Mycelium moderately extensive, diffuse; principal hyphae slender, branched, Gemmae rarely formed, filiform. Zoosporangia not abundant; clavate or fusiform, occasionally curved; apex frequenfly constricted into a long, narrow irregular discharge tube; predominantly 300 × 35 μ; renewed sympodially. Oogonia abundant; lateral; spherical; 63-35 μ in diameter, predominantly 55-45 μ, exclusive of wall ornamentation; unpitted; densely with truncate wall ornamentation; usually 1.5-7.5 μ, predominantly 9-11 μ. Apex of ornamentations thin walled. Oogonial stalk 1 time the diameter of oogonium in length; stout, recurved or bent, rarely straight, sometimes once-coiled. Antheridial branches androgynous, rarely monoclinous, very rarely diclinous; short. Oospheres maturing. Oospores eccentric; spherical or ellipsoidal; filling the oogonium. Oospores 2-13 in number, generally 5-8; 20-25 μ in diameter.
 
 
 
 
 
　Specimens：

Easily collected at any place in Taipei throughout the year. (Nov. 22,1973. Yang-Ming Shan; garden soil).
 
 
 
　Habitat： Soil and water
 
 
 
　Distribution：

Chapel Hill, N Carolina ; Taiwan
 
 
 
　References：

Dick MW. 1969; Johnson TW Jr. 1956.
   
   
   
　Provided：

T. S. Chiou and H. S. Chang
 
 
　Note： In general, A. recurva occurred widely in soil, particularly in forest and tea garden soils. In vitro, the oogonium can germinate after incubation for 3-4 weeks. Our isolate is different from that of Johnson’s (1956) by the shorter truncate wall ornamentation in oogonium.