Observation 157785: Geastrum Pers.

Proposed Names

54% (1)
Recognized by sight
76% (1)
Recognized by sight: Geastrun minimum is not fornicate, with the mycelial layer incrusting debris. This falls between G. minimum and G. quadrifidum and tends to be lumped with one or the other.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Plate 72 Coker & Couch
By: John Steinke (John Steinke)
2014-01-20 01:57:02 +03 (+0300)

The Gastromycetes of the Eastern US and Canada by Coker & Couch would be my link. Under Geaster Coronatus Coker & Couch fail to separate Geastrum quadrifidum,Geastrum minimum ( Plate 71) and the intermediate Geastrum (Plate 72).
G.coronatum, G. quadrifidum and G. minimum landed spots as excepted earthstar names, but Plate 72 went unnamed. I have mad many collections that fit Plate 72 better than G. quadrifidum or G. minimum. The features that standout are the irregular cracking of the pseudoparenchymataus layer,not following the strait lines of the rays. Mycelial cup thin, encrusting very little debris, usually in fine sand. Upon dehydrating the myclial cup is pulled from the substrate and remaining with the rest of the earthstar, attached by only one or two rays.
Call me right, call me wrong, but first think about it.

By: Irene Andersson (irenea)
2014-01-14 21:22:23 +03 (+0300)

In G. minimum, the mycelial layer often remains on the ground with contact only with the tips of the rays – fornicate – as in quadrifidum… One difference is the inrolled ray tips in quadrifidum, and of course the different shape of the bulb.

Do you have information, a link(?) telling about an intermediate species?

Yes I do.
By: Gerhard Koller (Gerhard)
2014-01-12 21:44:07 +03 (+0300)

Many data still missing. Have to overwork various ID’s.

Thanks for the link!
By: Irene Andersson (irenea)
2014-01-12 21:32:09 +03 (+0300)

- are you reporting obses to that database?

In the database for Austria
By: Gerhard Koller (Gerhard)
2014-01-12 21:02:19 +03 (+0300)

there are quite a few finds but most of them date back some twenty to thirty years ago. There are not many mycologists into them here.


Forgot to say -
By: Irene Andersson (irenea)
2014-01-12 20:55:12 +03 (+0300)

it’s a nice find! Quite rare in Sweden, how about Austria?

You’re right.
By: Gerhard Koller (Gerhard)
2014-01-12 20:49:54 +03 (+0300)

It is minimum. Thanks for the ID.

Geastrum key
By: Irene Andersson (irenea)
2014-01-12 20:45:13 +03 (+0300)


These are not quadrifidum to me, rather like typical G. minimum. If you have kept some specimen and let them dry, you’d be able to feel/see a scurfy surface on the bulb. It’s a very small species, isn’t it?

Created: 2014-01-12 20:03:44 03 (0300)
Last modified: 2014-01-14 19:26:22 03 (0300)
Viewed: 60 times, last viewed: 2017-06-18 04:44:24 03 (0300)
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