Dijana:

Kindly provide scale and image of Fruit, if possible. Thanks.

Best

Syed

Difficult to make out from this photograph

would be good to have an idea where they come from

I would say Apiaceae

 Maybe Anthriscus

Sorry, currently I can't provide better image. Seed is approximately 5 mm long and 1 mm wide. On the surface it has small hair. Seed is found in grass seed sample. It is not Anthriscus sp. Maybe it's the seed of wild flower?

Dijana:

Based on information you provided, the documented seed possibly belongs to Lettuce plant (Lactuca sp., Asteraceae). Just examine the seeds under SEM and look for actual plant growing in the area of seed collection.

Best

Syed

Thank you for your response. I already compare Lactuca sp. seed from reference seed collection with unknown seed and it's not Lactuca sp.

If you have time you could grow the seed out to the point that you can identify the plant. That would be my suggestion if you do not have to know immediately as it could take a bit with this method.

Photograph of the plant will help in ID. Kindly post.

This seed was found in working sample of grass seed, so I only have fruit and not the whole plant.

Anybody knows what seed is this?