The Pear-shaped Puffball is a small but conspicuous fungus covered with tiny warts and granules.
It grows mostly on dead wood of rotten logs or stumps.
Dutch name : Peervormig Stuifzwammetje
German name : Birnen-Stäubling
Latin name : Lycoperdon pyriforme
Here you can see his big brother, the Common Puffball[fc-foto:26165787]