I
I
- Ibbetsonia
- Iberidella (Diminutive of Iberis ORD)
- Iberidella (Species described below)
- Iberis
- Icacina
- Ichneumon Flies
- Ichnocarpus
- Idesia
- Ilicineae
- Illecebraceae
- Illecebrum
- Illicium (From illicio to entice)
- Illicium (To the species described on p)
- Imantophyllum (From imas imantos a leather)
- Imantophyllum (To the species described on p)
- Impatiens (From impatiens impatient)
- Impatiens (To the species described on pp)
- Imperatrice Eugenie
- Incarvillea
- Including Fumana
- Including Prinos
- Indigofera
- Inga
- Inocarpus
- Insecticides
- Insects (Gardenias if not well looked)
- Insects (No other class of the animal)
- Inula
- Iochroma
- Ione
- Ionidium
- Ionopsidium
- Ionopsis
- Iostephane
- Ipecacuanha
- Ipomcea (From Ips Bindweed and omoios)
- Ipomcea (To the species described on pp)
- Iresine (From eiros wool referring)
- Iresine (To the species described on p)
- Iriartea
- Irideae
- Iris (Greek name for the rainbow)
- Iris (To the species described on pp)
- Ironmonger
- Islands
- Isomeris
- Isonandra
- Isoplexis
- Isopogon
- Isopyrum
- Isotoma (From isos equal and toma)
- Isotoma (To the species described on pp)
- Isotropis
- Itea
- Ixanthus
- Ixia
- Ixiolirion
- Ixodia
- Ixora (Name of a Malabar Idol)
- Ixora (To the species described on pp)