Observation 26193: Calvatia gigantea (Batsch) Lloyd

When: 2009-10-03

Collection location: Delaware Co., Indiana, USA [Click for map]

Who: Dale Asberry (bigd)

No specimen available

Species Lists


The greenish/tan color on the mushroom is from walnut hulls.

Proposed Names

28% (1)
Used references: Arora’s Mushrooms Demystified.
71% (2)
Eye3 Eyes3
Used references: Arora’s Mushrooms Demystified. Base often has a single root-like structure, but not always. Missing here. Size quite variable: from baseball to larger than a basketball.

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Nor am I
By: Daniel B. Wheeler (Tuberale)
2009-10-05 16:06:29 EDT (-0400)

well-versed in identification. I’m always learning new things. Makes life interesting.

By: Dale Asberry (bigd)
2009-10-05 13:39:03 EDT (-0400)

I thought it was C. gigantea too after researching more in depth, just not well versed in identification yet.

More details…
By: Dale Asberry (bigd)
2009-10-05 09:32:29 EDT (-0400)

The largest one I found was about 5 lbs and a foot across. The one in the pictures was the smallest and it was about 6" across.

I found them growing in a straight line in an area where a significant number of walnuts were rotting.

Although the color is bit yellowish, the mushrooms are ivory colored, slightly off-white.

Need more info
By: Daniel B. Wheeler (Tuberale)
2009-10-03 17:11:45 EDT (-0400)

Size is important in keying out puffballs, which this appears to be. Dried leaves help, but may be misleading: could be 3 inches long in foreground, or 12 inches (if chestnut). If possible, need photo of interior of fungus sliced through the approximate center of the base. Could be Langermania gigantea, C. booniana (I think you are far enough West), or smaller C. cyathiformis with purple spore mass (gleba). Until then, let’s go with Calvatia, even tho it may prove to be otherwise.

Need to slice open.
By: Daniel B. Wheeler (Tuberale)
2009-10-03 14:32:53 EDT (-0400)

Initial reaction: Calvatia.

Created: 2009-10-03 12:16:40 EDT (-0400)
Last modified: 2011-09-28 15:23:36 EDT (-0400)
Viewed: 136 times, last viewed: 2018-06-25 21:55:20 EDT (-0400)
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