oospore: thick-walled, sexually-derived resting spore of Oomycetes (Phytophthora cinnamomi)

oogonia): female gametangium of Oomycetes, containing one or more gametes (Phytophthora cinnamomi)

zoosporangium: sporangium, or spore case, that bears zoospores (Phytophthora gonapodyides)

zoosporangium: sporangium, or spore case, that bears zoospores (Phytophthora gonapodyides)

papilla: nipple-like projection; used to describe the tip of some sporangia and the localized wall thickenings on the inner surface of plant cell walls at sites penetrated by fungi (papillate sporangium of Phytophthora cactorum)

papilla: nipple-like projection; used to describe the tip of some sporangia and the localized wall thickenings on the inner surface of plant cell walls at sites penetrated by fungi (papillate sporangium of Phytophthora cactorum)

oogonium (pl. oogonia): female gametangium of Oomycetes, containing one or more gametes (Phytophthora cinnamomi)

oospore: thick-walled, sexually-derived resting spore of Oomycetes (Phytophthora cinnamomi)

Downy mildew (Plasmopara viticola) shown on the upper and lower surface of a grape leaf.

Downy mildew (Plasmopara viticola) shown on the upper and lower surface of a grape leaf.

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