Undergrowth — Rhizome Lurcher enters the battlefield with a number of +1/+1 counters on it equal to the number of creature cards in your graveyard.
Because tokens aren’t cards, they never count for undergrowth abilities.
Creature cards with other types, such as artifact creature cards, count for undergrowth abilities.
If you return Rhizome Lurcher from your graveyard to the battlefield, its undergrowth ability counts itself.