I like all of yours!
Mine, plus some names from my new 1930s botanical name book:
Idria - tree of lower California
Inga - tropical acacialike trees
Iris - common garden perrenial
Irisine - blood leaf (I can imagine multiple pronunciations)
Ismene - Peruvian daffodil, spider lily
Itea - sweet spire,
Virginia willow
Ixia - cormous plants, like gladioli
Ixora - jungle geranium, iron trees
IngridIoIreneIrinaIsisIlara
Ilaria