Blanchefleur

Blossom

Clementine

Daisy

Fleur

Flora

Florence

Holly

Iris

Juniper is a nature name that we really like. While it's trendiest for girls -- about 2500 baby girls were named Juniper in 2022 versus 34 baby boys -- the most notable Juniper in history was the saint Brother Juniper, a follower of Saint Francis renowned for his generosity.  Blessed Junipero Serra, who founded the first of the California Missions, took his name from the earlier Saint Juniper.

Juniper

The graceful, natural image of the verdant shade tree transcends any connection with President Johnson.
 A sturdy tree that can live for centuries, Linden was actually quite a popular boys' name from the 1930s to the 1960s--as was the presidential spelling Lyndon--but has now become unisex.

Linden

Laurel

Lavender

Lilac

Lily

Magnolia

Marigold

Meadow

Olive

Petal

Petunia

Poppy

Rose is derived from the Latin rosa, which referred to the flower. There is also evidence to suggest it was a Norman variation of the Germanic name Hrodohaidis, meaning "famous type," and also Hros, "horse". In Old English it was translated as Roese and Rohese.
 
Rose, one of the old-time sweet-smelling flower names, has had a remarkable revival—first of all as a middle name—with parents (e.g., Jennifer Garner & Ben Affleck, Jon Stewart, Eric Clapton, Ewan McGregor) finding Rose to be the perfect connective, with more color and charm than old standbys like Sue and Ann. At this point in time, though, some parents are finding there are too many roses in the middle spot of the garden.
 As a first name, Rose reached its highest point from 1896 to 1921, the early heyday of flower names, when it was in the Top 20, though it had been in use for centuries before. Rosy/Rosie is an irresistibly cheery nickname, very popular on its own in the UK. There are any number of Rose offshoots, including Rosa, Rosetta, Roseanne, Rosanna, Rosemary, Rosamund, Rosalind, Rosalie, and Rosina.
 Rose and Rosie have long been celebrated in song, and notable Roses range from Rose Kennedy to Rose Byrne, and on-screen Roses have featured in a range of films and TV shows, from Titanic to Harry Potter to Golden Girls.

Rose

Rosemary

Snowdrop

Tulip

Violet

Willow

Eressea's list "Mary, Mary, Quite Contrary" of 29 great name ideas: Blanchefleur - Willow!

Mary, Mary, Quite Contrary