Observation 199497: Tulostoma polymorphum Long

When: 2015-02-20

Collection location: Long Canyon Area, Coconino Co., Arizona, USA [Click for map]

Who: Terri Clements/Donna Fulton (pinonbistro)

Specimen available

Sandy soil under Arizona cypress. Spore sac up to 18 mm. across with raised, irregular mouth. Woody brown stalk up to 4 cm. X 4mm. with abrupt bulbous base up to 1 cm across. Brown spore deposit. Elevation 4500-5000’.

Proposed Names

-29% (1)
Recognized by sight: whitish spore sac with brown base, large fibrose mouth, woody brown stalk with basal bulb, in sandy soil in upper Sonoran zone
Used references: http://mycoportal.org/...=Tulostoma & other stalked puffball species
55% (1)
Recognized by sight
60% (2)
Eye3 Eyes3
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Thanks, Bob
By: Terri Clements/Donna Fulton (pinonbistro)
2015-03-07 19:40:46 PST (-0800)

for taking the time to look at these.


Checked out the spores
By: Bob Chapman (Disciseda)
2015-03-07 18:56:46 PST (-0800)

Mostly round, moderately verricose, 4.5-6.0ɥm. I’m inclined to call these T. polymorphum. There seem to be nothing about these that differs from Wright’s description. I was pleased to see his final comment on polymorphum:

Remarks: The features of this species are so similar to those of T. fimbriatum var. campestre that it is highly probable that they may be synonyms.

as fimbriatum was my first thought.

By: Terri Clements/Donna Fulton (pinonbistro)
2015-02-23 16:47:03 PST (-0800)

These went out today. I boxed them—hopefully they don’t get crushed.


By: Bob Chapman (Disciseda)
2015-02-23 10:18:26 PST (-0800)

I’d like to look at these. If you would care to send some of them to me I would scope them and see what I can come up with. Just send me an email and I’ll give you my address. The more I look at these the more they look like fimbriatum.

Thanks Bob
By: Terri Clements/Donna Fulton (pinonbistro)
2015-02-22 21:51:26 PST (-0800)

for the comment. Wish I could get these under a microscope—buying a microscope and learning how to use it is on my to do list. In the meantime I have these specimens should they be of interest to someone.


I’m a skeptic, but if these are opacum — wow
By: Bob Chapman (Disciseda)
2015-02-22 16:22:05 PST (-0800)

You really need to check the spores. Opacum is a very rare Tulostoma. Long only found 7, six make up the type collection. I’ve found only 3 back in the 80s a few miles from the type locality. With so few ever found it’s hard to say what places they might inhabit. All the known collections were in "sandy soil in semiarid regions with “chaparral” vegetation" per Long. That being mesquite, acacia, creosote bush, but not cypress, but again so little is known about opacum. Nice collection whatever they turn out to be. If you can get the spore under a scope please update this observation.

Created: 2015-02-21 16:39:48 PST (-0800)
Last modified: 2015-03-07 19:38:26 PST (-0800)
Viewed: 138 times, last viewed: 2017-12-24 07:02:37 PST (-0800)
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