Yarrow
IrisImpatiensIpomoeaIxia
The Pokémon names confirmed to start with the letter Y are:YamaskYanmaYanmegaYveltal
yarrow yucca
If you mean "U", there are 0 flowers that start with "U".
Amaryllis , Aster,
· Honeysuckle
yolanda
y not
Bird of Paradise and Bluebells are flowers. They begin with the letter b.
Umbrella plant, urginea and ursinia are flowers. They begin with the letter U.
daffodil or daisy
Belladonna and Barberry