A bright orange-red club, parasitic on a buried moth larva or pupa.  The fertile head is wider than the paler orange stem.  The head is covered in raised pores.

Good photograph taken in the field or from a specimen

Grassland or woodland edge, attached to a moth pupa or larva below ground.

Summer and autumn.

Widespread but occasional; commonest in south (ref.: Sterry and Hughes, 2009)

Occasional

https://www.first-nature.com/fungi/cordyceps-militaris.php