1
Oleander
Nerium oleander
A Mediterranean and South Asian evergreen shrub with leathery leaves and showy pink, white, or red flowers, beautiful but among the most poisonous of garden plants.
You're looking for 3-syllable plants starting with O — here are 3 matches, each linked to a full profile.
List of 3-syllable Plants that start with O
2
Ostrich Fern
Matteuccia struthiopteris
A large North American and European fern named for its vase-shaped clumps of plume-like sterile fronds, the source of edible spring fiddleheads.
3
Oxalis
Oxalis triangularis
A vast genus of small clover-like plants found worldwide, grown as a houseplant for purple shamrock and dreaded as a weed in some species and climates.
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