Observation 64919: Helvella palustris Peck

When: 2011-03-19

Collection location: Parque de Monsanto, Lisboa, Portugal [Click for map]

Who: zaca

No specimen available

Images

Proposed Names

21% (2)
Recognized by sight
56% (1)
Recognized by sight

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= Observer’s choice
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Comments

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OK! Thanks again, Darv.
By: zaca
2011-03-31 14:16:10 CDT (-0500)
lacunae
By: Darvin DeShazer (darv)
2011-03-31 13:52:24 CDT (-0500)

They lacked a lacunose stipe and the species is named for that character. They have a ribbed stipe (as do many Helvellas), but lack the holes into the inner chambers that Helvella lacunosa is suppose to have.

Thanks, Darv.
By: zaca
2011-03-31 13:12:48 CDT (-0500)

I never heard of either H. palustris or H. philonotis. What led you to these species: was it the form of the cap, the consistency of the cap (smoother than in H. lacunosa) or anything else?

Immature spores
By: Darvin DeShazer (darv)
2011-03-30 19:27:46 CDT (-0500)

Your spores lack oil drops and appear to be immature. Maybe they will get bigger.
Abbott & Currah list a European synonym for H. palustris as H. philonotis.

Confused!
By: zaca
2011-03-30 18:37:27 CDT (-0500)

After the suggestion of Helvella palustris by Darv, I decided to observe the spores under the microscope. I have already uploaded some photos. The dimensions obtained:
Ascus: 200- 240 × 12-15 µm,
Spores: 12-14.5 × 8.6 – 10.4 µm,
are much lower than I expected also much lower that the dimensions of the spores of either H. lacunosa or H. palustris, presented for instance in “mushroom expert”.
Then, what can it be?