Gentianales
| Kingdom: | Plantae |
| Phylum: | Spermatophyta |
| Class: | Angiospermae |
| Subclass: | Dicotyledoneae |
| Superorder: | Asteridae |
| Order: | Gentianales |
- Family
- Genus
- species -- Common Name
- Alstonia
- constricta -- Australian Febrifuge, Pale Mara, Dita Bark
- Apocynum
- androsaemifoleum -- Dogbane, Bitter-root, Fly Trap, Western Wallflower, Wild Ipecac
- cannabinum -- Indian Hemp, Wild Cotton, Coctaw-root
- Aspidosperma
- quebracho -- Quebracho
- Nerium
- odoratum -- Rose Laurel, Oleander Leaf
- Rauwolfia
- serpentina -- Rauwolfia
- Vinca
- minor -- Periwinkle, Myrtle
Asclepiadaceae
- Asclepias
- carrassavica -- Blood-flower, Cancerillo
- incarnata -- Swamp Milkweed, Water Nerve Root, Rose-coloured Silkweed
- speciosa -- Showy Milkweed
- syriaca -- Milkweed, Silkweed, Swallow-wort, Wild Cotton
- tuberosa -- Butterfly Weed, Chigger Flower, Fluxroot, Canada Root
- Calotropis
- procers -- Yercum, Mudar Calotropis
- Marsdenia
- cundurango -- Condurango, Eagle Vine
Gentianaceae
- Centaurium
- umbellatum -- Feverwort, Centaury, Bitter Herb
- Frasera
- speciosa -- Elkweed, Deer Tongue, Green Gentian
- Gentiana
- lutea -- Gentian, Bitter Root
- villosa -- Marsh Gentian, Sampson's Snakeroot
- Menyanthes
- trifoliata -- Buckbean, Bog Myrtle, Marsh Clover, Marsh Trefoil
- Swertia
- chirata -- Indian Gentian, Chiretta
Loganiaceae
- Gelsemium
- sempervirens -- Jasmine, Southern Woodbine
- Spigelia
- marilandica -- Pink Root, Maryland Pink
- Strychnos
- chiretta -- Nux Vomica, Quaker Button
- ignatii -- Ignatius Bean
Oleaceae
- Chionanthus
- virginica -- Ash Flowering, Fringe Tree
- Fraximus
- alba -- White Ash
- excelsior -- European Ash
- ornus -- Manna Ash
- Ligustrum
- vulgare -- Common Privet
- Olea
- europaea -- Olive
Apocynaceae
