When: 2014-05-17

Collection location: Rooster Rock State Park, Multnomah Co., Oregon, USA [Click for map]

Who: Daniel B. Wheeler (Tuberale)

No specimen available


Proposed Names

78% (2)
Recognized by sight: I think you can see black interior of some torn lobes

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= Observer’s choice
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Add Comment
It does have a black interior.
By: Daniel B. Wheeler (Tuberale)
2014-05-18 23:40:04 NZST (+1200)

Thanks for looking, Jason.

By: Jason Hollinger (jason)
2014-05-18 17:29:44 NZST (+1200)

These are essentially identical, except that H. inactiva is black on the interior surface (tear open lobe tips to expose hollow interior), and H. imshaugii is pure white throughout the interior. Also, H. inactiva is a maritime species (pretty strictly west of the Cascades), while H. imshaugii is widespread throughout the region, both sides of the Cascades.