Observation 154337: Geastrum rufescens Pers.
When: 2013-12-06
Herbarium specimen reported

Notes: These earth stars appear in the cold weather. They emerge sometimes within 24 hours. They are often not attached to the substrate which is a lawn near a maple tree. It appears that the rays lift the fungus which has matured underground. This might explain why many of the fruitings are not attached.
Any other thoughts on what is going on here would be appreciated.

Proposed Names

48% (2)
Recognized by sight
83% (3)
Eye3 Eyes3
Recognized by sight: Very thick, reddish pseudoparenchymatous layer, peristome very plain from the start,much like G. fornicatum. Mycelial layer remaining intact, not fornicate as in G. fornicatum.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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By: Daniel B. Wheeler (Tuberale)
2013-12-12 11:18:25 PST (-0800)

seems conclusive for G. rufescens.

Dr. James Trappe spent an entire Q and A period with the Geastrums at NATS one evening. Seems like the size, # of layers, rays, and how the glebal sack splits are very important in final analysis.

I found a Geastrum hypogeous atop Larch Mountain a few years ago. It appears it was arrising from a well-rotted Noble fir log, mostly buried underground. Hard to identify when they are immature and below ground.

Thanks John
By: walt sturgeon (Mycowalt)
2013-12-12 07:37:15 PST (-0800)

That’s what I have been calling it but with no real confidence.

Still undecided
By: walt sturgeon (Mycowalt)
2013-12-11 16:54:20 PST (-0800)

4-6 cm, G. nanum has a striate apex. G. fornicatum obs. on MO are all from the west coast. Most fruitings had 6 or 7 rays. I don’t think there was a separable base.

Looks like G. nanum in Arora, Walt.
By: Daniel B. Wheeler (Tuberale)
2013-12-09 13:33:54 PST (-0800)

How large was the sporocarp? How many rays did it typically split into? Was there a separate base from which the rays arose, but was separated? Might be G. fornicatum then.

Created: 2013-12-06 18:18:52 PST (-0800)
Last modified: 2013-12-12 15:54:02 PST (-0800)
Viewed: 83 times, last viewed: 2016-02-23 15:51:56 PST (-0800)
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