Boronia.
Begonia
Both the flower and the letter a are curved because the a has a curve and the flower has pedals that are curved.
Beans
they both have a b coming after them.
Begonia
Sunflower.
Bluebell? Bluebell?
'But' is an interjection that begins with the letter 'b'.
panzies
carnation
Some seven letter words that start with a B include:baffledbankingbarkingbashfulbecausebelievebeneathbeggingblanketblenderblessedblisterblinkerblockerblossomblotterblastedblackenblatherblushedblunderblurtedbonfirebroughtbrittlebrisklybrieflybrotherbutterybutcherbuntingbustingbungled
Urginea is a flower. It begins with the letter u.