- Iberis amara
Bitter Candytuft - Iberis sempervirens
Perennial Candytuft - Iberis umbellata
Globe Candytuft - Iberodes linifolia
Venus's Navel Wort, White Flower Navel Wort - Ibervillea sonorae
Ibervillea - Idesia polycarpa
Igiri Tree, Wonder Tree - Ilex altaclerensis Lawsoniana
Highclere Holly - Ilex aquifolium
English Holly - Ilex aquifolium Argentea Marginata
Variegated English Holly - Ilex aquifolium Argentea Marginata Pendula
Variegated Weeping English Holly - Ilex aquifolium Aurea Marginata
Golden Variegated English Holly - Ilex aquifolium Golden Milkboy
Golden Milkboy Holly - Ilex aquifolium Handsworth New Silver
Handsworth New Silver Holly - Ilex aquifolium Silver Queen
Silver Queen Holly - Ilex chinensis
Purple Holly, Kashi Holly - Ilex cornuta
Chinese Holly, Horned Holly - Ilex cornuta Burfordii
Burford Holly, Chinese Holly - Ilex crenata
Japanese Holly - Ilex crenata Fastigiata
Upright Japanese Holly - Ilex crenata Mariesii
Dwarf Japanese Holly, Box Leaf Holly - Illicium anisatum
Chinese Anise, Japanese Anise Tree - Illicium floridanum
Purple Anise, Florida Anise Tree, Aniseed Tree, Florida Anise, Stink Bush, Star Anise, Mexican Anise Tree - Illicium verum
Star Anise - Impatiens balsamina
Balsam, Spotted Snap Weed - Impatiens capensis
Jewel Weed - Impatiens glandulifera
Indian Balsam, Policeman's Helmet - Impatiens hawkeri
New Guinea Impatiens - Impatiens niamniamensis Congo Cockatoo
Congo Cockatoo, Parrot Impatiens - Impatiens sodenii
Poor Man's Rhododendron, Shrub Balsam, Oliver's Touch-Me-Not, Oliver's Snap Weed - Impatiens walleriana
Busy Lizzie, Balsam - Impatiens walleriana double-flowered
Double Flowered Busy Lizzie, Balsam - Imperata cylindrica
Blady Grass, Woolly Grass, Cogon Grass, Sword Grass, Alang Alang Grass - Imperata cylindrica Rubra
Japanese Blood Grass - Incarvillea diffusa
Himalayan Gloxinia - Incarvillea diffusa white form
White Himalayan Gloxinia - Incarvillea mairei
Incarvillea - Indigofera amblyantha
Chinese Indigo, Pink Flower - Indigofera australis
Australian Indigo - Indigofera decora
Indigo - Indigofera heterantha
Indigo Bush - Inula ensifolia
Sword Leaf Inula, Slender Leaf Elecampagne - Inula helenium
Horse Heal, Elecampane - Inula hookeri
Inula - Inula magnifica
Showy Elecampane, Fleabane - Inula racemosa
Indian Elecampane, Showy Elecampane - Iochroma coccinea
Violet Bush - Iochroma cyaneum
Colombian Violet Bush - Ipheion uniflorum
Spring Star Flower - Ipomoea alba
Moon Flower, Tropical White Morning Glory - Ipomoea batatas
Sweet Potato - Ipomoea batatas Black Heart
Black Heart Sweet Potato - Ipomoea batatas Margarita
Margarita Sweet Potato - Ipomoea batatas Sweet Caroline Sweet Heart Light Green
Light Green Sweet Potato - Ipomoea batatas Sweet Caroline Sweet Heart Purple
Purple Sweet Potato - Ipomoea batatas Sweet Caroline Sweet Heart Red
Red Sweet Potato - Ipomoea brasiliensis
Beach Morning Glory, Goat's Foot, Railroad Vine - Ipomoea cairica
Cairo Morning Glory, Palmate Leaf Morning Glory - Ipomoea cairica alba
White Cairo Morning Glory, Palmate Leaf Morning Glory - Ipomoea horsfalliae
Cardinal Creeper, Lady Doorly's Morning Glory, Prince's Vine, Prince Kuhio Vine | - Ipomoea lobata
Spanish Flag - Ipomoea multifida
Cardinal Climber - Ipomoea pes-caprae
Beach Morning Glory, Goat's Foot, Railroad Vine - Ipomoea purpurea
Morning Glory - Ipomoea tricolor
Multi-Coloured Morning Glory - Iresine herbstii Aureoreticulata
Blood Leaf, Beefsteak Plant - Iresine herbstii Brilliantissima
Blood Leaf, Beefsteak Plant - Iresine lindenii
Blood Leaf - Iresine Purple Lady
Purple Lady Blood Leaf - Iris albicans
White Flag Iris - Iris bucharia
Iris - Iris chrysographes
Iris - Iris confusa
Bamboo Iris - Iris confusa Martyn Rix
Blue Bamboo Iris - Iris cristata
Dwarf Crested Iris - Iris crocea
Iris - Iris Divine
Divine Iris - Iris domestica
Blackberry Lily, Leopard Lily - Iris ensata
Japanese Iris, Russian Iris - Iris Evansia
Crested Iris - Iris fulvala
Louisiana Hybrid Iris - Iris germanica
Bearded Iris - Iris germanica Nepalensis
Blue Flag Iris - Iris laevigata
Japanese Water Iris, Rabbit Ear Iris - Iris pallida
Dalmatian Iris, Fragrant Root Iris, Orris, Sweet Iris - Iris pallida Variegata
Variegated Sweet Iris - Iris pseudacorus
Yellow Flag - Iris sibirica
Siberian Iris - Iris spuria
Spuria Iris - Iris unguicularis
Winter Iris, Algerian Iris - Iris versicolor
Blue Flag - Iris xiphium
Dutch Iris, Spanish Iris - Iris xiphium Angel Wings
Dutch Iris, Spanish Iris - Isatis tinctoria
Woad, Dyer's Woad, Marlahan Mustard - Ismene narcissiflora
Peruvian Daffodil - Isolepis cernua
Fibre Optic Grass, Low Bulrush, Slender Club Rush - Isoplexis canariensis
Isoplexis - Isopogon anemonifolius
Broad Leaf Drumsticks - Isopogon anemonifolius Little Drumsticks
Little Drumsticks - Isopogon anemonifolius Woorikee 2000
Woorikee 2000 Drumsticks - Isopogon anethifolius
Narrow Leaf Drumsticks - Isopogon dubius
Rose Cone Flower, Pincushion Cone Flower - Isopogon formosus
Rose Cone Flower - Isopyrum thalictroides
False Rue Anemone - Isotoma axillaris
Rock Isotome, Blue Stars - Itea ilicifolia
Holly-Leaf Sweetspire, Virginian Willow - Itea virginica
Sweetspire, Tassel White - Iva imbricata
Seacoast Beach Elder - Ixia
Corn Lily - Ixia viridiflora
Turquoise Ixia, Green Ixia - Ixiolirion tataricum
Siberian Lily, Lavender Mountain Lily - Ixora chinensis
Chinese Ixora - Ixora coccinea
Jungle Flame, Flame of the Woods, Scarlet Ixora, Jungle Geranium - Ixora Dwarf Orange
Dwarf Orange Ixora - Ixora Gold Fire
Gold Fire Ixora - Ixora Prince of Orange
Prince of Orange - Ixora Yellow
Yellow Ixora
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