| There is a distinctive marginate bulb at the base of the stem, and no ring. |
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| The stem has a distinct bulb at the base, which is moderately marginate, and lacks a ring. |
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| The trunk tergites have a pair of slightly curved longitudinal paramedian sutures, and more posterior tergites are marginate with a ridge along the lateral margin. |
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| Upon maturation, bone marrow neutrophils are released into the circulation where they marginate on inflamed blood vessel endothelial cells and migrate through them into the area of infection. |
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| Rolf Singer put it in the section Rubromarginata in his 1986 The Agaricales in Modern Taxonomy, a group characterized by having distinct red marginate gills. |
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