Plant ID forum→Anyone recognize this aroid volunteer?

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Central Florida (Zone 10a)
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Wildbloomers
Jul 3, 2021 2:44 PM CST
First pic is of flower/spathe taken a week ago
Thumb of 2021-07-03/Wildbloomers/70b02c
Next is looking down on mature 24" leaf
Third is the flower this morning, hasn't changed much. I'm confused by the filaments. Haven't seen them on other aroids.
Thumb of 2021-07-03/Wildbloomers/143f9c
Next are new leaves indicating "eyes" on the corm or new corms forming
Then a close up of the flower spike emerging from the space between the leaves
Thumb of 2021-07-03/Wildbloomers/4ac3a0
Last is an attempt to look inside the spathe. Thumb of 2021-07-03/Wildbloomers/c61e3e
Thumb of 2021-07-03/Wildbloomers/ffaba8
Thumb of 2021-07-03/Wildbloomers/841e17
The leaf petioles look ridged but are absolutely smooth. Also no prickles or bumps of any kind. This thing just popped up a year ago amongst my other aroids of this type and I thought I'd ID it when it flowered but I'm at a loss. Going through amorphophallus, dracontium and anchomanes one species at a time. Hoping someone can save me a little time.
Be kind, we all struggle sometimes.
Name: Gina
Florida (Zone 9a)
Tropical plant collector 35 years
Region: Florida Tropicals Aroids
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Gina1960
Jul 3, 2021 3:53 PM CST
WOW. I am stumped. Before I saw the inflo, I would have said maybe Gonatopus. That inflo should be a dead giveaway, its so unusual. I'm going to ask around.
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San Francisco Bay area (Zone 9a)
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Iochroma
Jul 3, 2021 5:30 PM CST
I agree; that's a weird one!
Name: Gina
Florida (Zone 9a)
Tropical plant collector 35 years
Region: Florida Tropicals Aroids
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Gina1960
Jul 3, 2021 6:06 PM CST
I actually do not think its an aroid. I think its a Tacca (bat plant)
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Name: Gina
Florida (Zone 9a)
Tropical plant collector 35 years
Region: Florida Tropicals Aroids
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Gina1960
Jul 3, 2021 7:27 PM CST
I showed your photos to Dr. Peter Boyce, who believes that your plant is a Tacca in the group of the species leontopetaloides. Not leontopetaloides itself, but similar. DO you have the provenance by chance of the surrounding plants?
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Name: Lin Vosbury
Sebastian, Florida (Zone 10a)

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plantladylin
Jul 3, 2021 7:35 PM CST
It does look similar to Polynesian Arrowroot (Tacca leontopetaloides)

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Central Florida (Zone 10a)
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Wildbloomers
Jul 3, 2021 11:32 PM CST
I believe that you are correct in the plant being a tacca. I should have figured it out from the tentacles. The plant was a volunteer in a pot with amorphophallus Konjak that I got from Tropiflora years ago and had a single divided leaf so I assumed it was an aroid like gonatopus or anchomanes etc. that have a single leaf. Thank you so much, now I can narrow my search to tacca species. Tacca also makes sense with the second leaf coming out where the bloom is emerging. I'll call Tropiflora and ask what tacca species they've carried in the past. Again thank you all!
Be kind, we all struggle sometimes.
Name: Gina
Florida (Zone 9a)
Tropical plant collector 35 years
Region: Florida Tropicals Aroids
Image
Gina1960
Jul 4, 2021 6:27 AM CST
I know they have carried leontopetaloides, I bought a few from them. But in years past they may have had some more unusual species. I bought a Xanthosoma from them in the 1990'a that I have never seen anywhere else again, Xanthosoma wendlandii. They used to offer a lot more than bromeliads, but in more recent times have paired down those offerings
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