Sorry for repeats! These are on my own list (either as favourites or guilty pleasures!);
Marigold
[name_f]Lavender[/name_f]
[name_f]Violet[/name_f]
[name_f]Poppy[/name_f]
[name_f]Bluebell[/name_f]
[name_f]Blossom[/name_f]
[name_f]Petal[/name_f]
Honeysuckle
[name_f]Daisy[/name_f]
[name_f]Clover[/name_f]
[name_f]Posie[/name_f]
[name_f]Rosie[/name_f]
[name_f]Primrose[/name_f]
[name_f]Fleur[/name_f]
[name_f]Ffion[/name_f] (Welsh for foxglove)
[name_f]Tulip[/name_f]
I know a mama whose stepdaughter is a [name_f]Zinnia[/name_f].
Chrysanthemum!!
Azalea
[name_f]Camelia[/name_f]
[name_f]Dahlia[/name_f]
[name_f]Delphine[/name_f]
[name_f]Elodie[/name_f] (on some websites, this name is associated with a Greek word that means field flower)
[name_f]Flora[/name_f]
Florenc
[name_f]Lilac[/name_f] (or [name_f]Lila[/name_f] in [name_u]French[/name_u])
[name_f]Orchid[/name_f]
[name_f]Primrose[/name_f]
I love flower names. [name_f]Violet[/name_f], [name_f]Poppy[/name_f], [name_f]Daisy[/name_f], [name_f]Rose[/name_f], [name_f]Zinnia[/name_f] and even [name_f]Chrysanthemum[/name_f]
‘Underrated’ flower names are my guilty pleasures!
There was a book I read in the seventh grade based on the twelve dancing princesses and all the girls were named after flowers, some of my favourites were: [name_f]Azalea[/name_f], [name_f]Clover[/name_f], [name_f]Delphinium[/name_f], [name_f]Evening[/name_f] [name_f]Primrose[/name_f], Goldenrod “[name_f]Goldie[/name_f]”, Hollyhock “[name_u]Holly[/name_u]”, and [name_f]Jessamine[/name_f]
Some others I love that I believe are severely underrated are: [name_f]Calla[/name_f] [name_f]Lily[/name_f], [name_f]Edelweiss[/name_f], [name_u]Larkspur[/name_u], [name_f]Lavender[/name_f], [name_u]Lotus[/name_u], and [name_f]Peony[/name_f]
Dahlia is my favorite 
I also love [name_f]Violet[/name_f] but I dont think its underrated - been quite popular.
I also like [name_u]Aster[/name_u], [name_f]Iris[/name_f], and [name_f]Calla[/name_f].
I feel like I want to like [name_u]Lotus[/name_u] - would be a cool but brave name.
I knew a family growing up in the 80’s and their kids were named Dande [name_m]Lion[/name_m] (a girl), [name_f]Clover[/name_f], and [name_u]Levi[/name_u]. I thought they had the most amazing names ever! Dande just went by Dande without the [name_m]Lion[/name_m]. I think Dande [name_m]Lion[/name_m] would be a super cool boy name!!