annulate

This species is recognizable at once by its regular, uniform, depressed, annulate or pitted sporangia, scattered evenly over the habitat of rotten leaves or wood.

From The North American Slime-Moulds A Descriptive List of All Species of Myxomycetes Hitherto Reported from the Continent of North America, with Notes on Some Extra-Limital Species by Thomas H. (Thomas Huston) MacBride

Sporangia white, depressed, annulate, sometimes with short stipes 17.

From The North American Slime-Moulds A Descriptive List of All Species of Myxomycetes Hitherto Reported from the Continent of North America, with Notes on Some Extra-Limital Species by Thomas H. (Thomas Huston) MacBride

This is a beautiful species, easily known by its discoidal or almost annulate sporangia mounted upon short dark black stipes.

From The North American Slime-Moulds A Descriptive List of All Species of Myxomycetes Hitherto Reported from the Continent of North America, with Notes on Some Extra-Limital Species by Thomas H. (Thomas Huston) MacBride

It is highly contractile and when contracted sometimes assumes an annulate appearance; but as a rule the external surface is smooth.

From Freshwater Sponges, Hydroids & Polyzoa by Nelson Annandale

P. convex, umb. squamulosely punctate from the umbo, milk-white with densely crowded yellow striae; g. very broad, crowded; s. stuffed, thin, obsoletely annulate below middle. transilvanica, Schulz.

From European Fungus Flora: Agaricaceae by George Massee