Field Earthstar (Geastrum campestre)

Photo: Field Earthstar:
Notice !
« balloon (rough greyish)
« apophyse (rounded bag-shaped)
« mouth-zone (plicate-furrowy, conic)
« ring-furrow (sharp)
« stem (short, broad, white).

Field Earthstar (Geastrum campestre)

Photo: Field Earthstar, dunal area at the border of Sea Buckthorn bushes, Castricum September 2007
« subhygroscopic star-rays
(curling by dryness, but do not cover up the balloon completely)
« star-rays color
(upperside young creme, old intens dark-brown)

Field Earthstar
(Geastrum campestre Morgan)
NMV Ga 211020

Mistakability Field Earthstar with:

  • Dwarf Earthstar (Geastrum schmidelii)
    Dwarf has baldy balloon and non-hygroscopc star-rays
  • Berkeley's Earthstar (Geastrum berkeleyi)
    Berkeley's has non-hygroscopic star-rays
  • Elegant Earthstar (Geastrum elegans)
    Elegant has a fibrillose mouth-zone, and baldy balloon, without stem
  • Tiny Earthstar (Geastrum minimum)
    Tiny has a fibrillose mouth-zone, and a floury but not rough balloon, and is much smaller

How to exclude mistakability:

  • Look at the bottom of the earthstar
  • Is it fixed in the ground (encrusted debris)?
  • Dry Earthstar and make it wet again: are the star-rays curling and stretching (sub-hygroscopic/hygroscopic).
  • If this is not helpful: dry the earthstar, and see what changes during the dry-process

At dry, sunny places out of the wind, often at non-calcareous, poor sand often in open dunes in grassland and mossy places, in broad forest path-sides, at open places in deciduous and coniferous woodland, and sometimes under Hawthorn.

Wood species:
Deciduous wood (Hawthorn)


Urban area: Academic Medical Hospital grounds in 1998 under Birch.
Pleistocene area: no.
Northsea Dunal Coast:yes

Field-Marks: See: Anatomy Genus Geastrum

  • Species size: small
  • Stem (visible below balloon): yes (short, broad, white), apophyse rounded bag-shaped
  • Balloon in diameter: 9-16 mm.
  • Balloon surface: warty, rough, floury cristalline, older id. but darker
  • Balloon color young: grey
  • Balloon color older: dark-grey, dark-brown, black-brown
  • Balloon mouth-zone: plicate-furrowy, ring-furrow, (often low) conical
  • Balloon mouth-zone color: lighter than balloon color
  • Star-rays number: 7-10
  • Star-rays in diameter: 1 - 3,5 cm
  • Star-rays-thickness: fresh till 2 mm
  • Star-rays top color: young creme, older brown
  • Star-rays bottom color: pale brown
  • Star-rays: encrusted debris
  • Star-rays: no scar
  • Star-rays: convex, subhygroscopic

Chrispijn, R. ed. (1999), Champignons in de Jordaan (De paddenstoelen van Amsterdam), Schuyt en Co, 162-163.
Hansen L. & H. Knudsen (1997), Nordic Macromycetes, Vol. 3, Heterobasidioid, aphyllophoroid and gasteromycetoid basidiomycetes, Kopenhagen, 1997, 444 pp.
Jalink, Leo M (1995) De aardsterren van Nederland en België, Coolia 38 Supplement.

Macroscopic Key:
See Macroscopic Key of Earthstars on this site.