Thanks, Lalithamba ji.
I initially thought of it, but somehow did not pursue further.
Both are closely related as per keys from Flora of China
<http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=10216>:
16 (15)
<http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=10216#KEY-1-15>
Stems
terete or striate, not winged; fruit a 4-valved capsule or shattering
irregularly   12 Merremia
<http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=120299>
+ Stems (and often petioles, peduncles) winged; fruit with a thickened
circumscissile lid that separates from ± papery and tardily shattering
endocarp   14 Operculina
<http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=122967>

Yes, you may be right.
FOPI shows distribution of the following in Odisha.
https://indiaflora-ces.iisc.ac.in/FloraPeninsular/herbsheet.php?id=2905&cat=7

On Tue, 17 Jun 2025 at 14:14, Lalithamba Avadhanam <[email protected]>
wrote:

> It looks Camonea umbellata (Merremia umbellata) here it is
>
> On Tue, Jun 17, 2025 at 12:14 PM J.M. Garg <[email protected]> wrote:
>
>> Flower appears to have fallen from some other plant.
>> Can it be Operculina petaloidea ? as per
>>
>> https://indiaflora-ces.iisc.ac.in/FloraPeninsular/herbsheet.php?id=2910&cat=7
>> https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:270801-1
>> https://botany.dnp.go.th/eflora/floragenus.html?factsheet=Operculina
>> https://botany.dnp.go.th/eflora/floraspecies.html?tdcode=04521
>> https://www.inaturalist.org/taxa/993895-Operculina-petaloidea
>> https://www.gbif.org/occurrence/gallery?taxon_key=7323873
>>
>>
>> ---------- Forwarded message ---------
>> From: J.M. Garg <[email protected]>
>> Date: Sat, 14 Jun 2025 at 18:11
>> Subject: 140625PKD1: Id pls collected from Khurda on june 2025
>> To: efloraofindia <[email protected]>
>> Cc: Kumar Prabhat Das <[email protected]>
>>
>>
>> Thanks, Prabhat ji
>>
>>
>> With regards,
>> J.M.Garg,
>> https://efloraofindia.com/
>>
>> ---------- Forwarded message ---------
>> From: Kumar Prabhat Das <[email protected]>
>> Date: Sat, 14 Jun, 2025, 4:35 pm
>> Subject: Id pls collected from Khurda on june 2025
>> To: J.M. Garg <[email protected]>
>>
>>
>>
>>
>>
>> --
>> *Dr. Prabhat Kumar Das*
>> Ph.D. In BOTANY, UTKAL UNIVERSITY
>> Research Associate
>> CBT, SOA, BBSR-751003
>> MOB: 9438015926
>> [email protected]
>> https://www.researchgate.net/profile/Prabhat-Das
>> https://orcid.org/0000-0001-9844-9380
>> https://www.linkedin.com/in/pravat-das-6ab175167/
>>
>>
>> --
>> With regards,
>> J.M.Garg,
>> https://efloraofindia.com/
>>
>
>
> --
> A.Lalithamba
>


-- 
With regards,
J.M.Garg,
https://efloraofindia.com/

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