Please use real names.

Greetings to all who have registered to OPF and those guests taking a look around. Please use real names. Registrations with fictitious names will not be processed. REAL NAMES ONLY will be processed

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We are a courteous and supportive community. No need to hide behind an alia. If you have a genuine need for privacy/secrecy then let me know!
Welcome to the new site. Here's a thread about the update where you can post your feedback, ask questions or spot those nasty bugs!

Bidens multispectral

Bidens flower in human vision, reflected UV, simulated butterfly and bee vision (left to right, top to bottom)

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