A native species in the same genus as the Shaggy Parasol. Large bulbous base, sliding ring, brightly oxidizes orange, then brown on cutting, particularly at the base of stem, smells pungent. Chlorophyllum species need high heat when cooking to prevent stomach upsets. Could be confused with the poisonous Green spored parasol but has white spores. Could be confused with a poisonous Amanita which also have white spores but do not oxidise bright orange on cutting. A similar look alike is Chlorophyllum brunneum. Though I have eaten C. nothorachodes it is relatively unknown. C .brunneum on the other hand is well documented as an edible occurring in many countries. These two species can be found growing together in Australia and can be differentiated by observing the bulb and the ring.
The ring on the left shows the view from below, (laying on the ground looking up at the ring) the inner ridge is the attachment point, so the ring is attached below. This is best understood by removing them.
Left-detail of double ridged ring,. Right-Young mushroom shows smooth bulbous base.
Observations made at the young stage are crucial as this mushroom takes on various appearances as it matures. The length of overcast weather, when the sun comes out and for how long are some of the obvious factors.