My favorites:
BlossomBryonyCassiaCherry (a guilty pleasure, for sure)
Hyacinth (for a boy, also a guilty pleasure)
IrisJasmineMyrtleOrchid
SennaThistle
Tulip
A few I noticed are missing:
Bluebell
Bloom
Catalpa
ColumbineJacaranda
JessamineLupine (one of my very favorite names right now)
Plum
Yarrow
There are a few Spanish and French flower/plant names I love as well:
Achillée (yarrow)
Almendra (almond)
Amapola (poppy)
Begoña Bleuet (cornflower)
Capucine (nasturtium)
Ciruela (plum)
Flor JacintheJacinto (love a flower name for a boy)
Jasmin (often used as a boys’ name in
France)
Lilas (lilac)
Lirio (lily)
Myosotis (forget-me-not)
Myrtille (blueberry)
Orchidée
Pensée (pansy, also means ‘thought’)
Pétale
Romarin (rosemary)
Romero (rosemary)
Verveine (verbena)
Violeta