I know this is years late, but I thought I could contribute. The proper word for a flower opening would be 'Anthesis'. This is when in which a flower opens and becomes sexual active. Meaning it can except sperm within its ovule and or deliver pollen.

I know this is years late, but I thought I could contribute. The proper word for a flower opening would be 'Anthesis'. This is when in which a flower opens and becomes sexual active. Meaning it can accept sperm within its ovule and or deliver pollen.