Gaeumannomyces leptosporus in Papua New Guinea.

Abstract

Gaeumanomyces leptosporus Iqbal developed on submerged decayed leaves held in water culture tn the laboratory. The long perithecial necks, however, protruded into the air above the water surface. On removal of the substrate into a drier atmosphere, asci were extruded tn a milky droplet at the tip of each neck. The ascospores were 3-sef late, with on: nucleus per cell. Simple, dark brown spherical to pear-shaped appressoria developed m hanging drops from ascospores germinating within asci and as released sf ores . No hyphopodia developed on sterile or asterile plant surf aces when
inoculated with the isolate. Although this is only the second record of the fungus in the world, the first being in England, its occurrence in two such diverse locations probably indicates that it is of worldwide distribution.