Lycoperdon mammiforme Pers. (illustrated 50% life size) Fruit body 4–7cm across, 4–9cm high, subglobose with a broad umbo, tapering into a short stem; white at first then ochre-brown; outer wall breaking into large, white or creamy, cottony scales, leaving a ring-like zone around the base of the head; inner wall thin, papery, opening by a central pore. Gleba finally dark purplish-brown; sterile base spongy, well-developed. Spores 4–5¼ in diameter, globose, warted; chocolate-brown. Habitat in deciduous woods on chalk soil; summer to autumn. Uncommon. Unknown edibility.