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Scientific Name Common Name(s) Plant Category Image
Impatiens hawkeri New Guinea impatiens Annuals
Impatiens walleriana Busy Lizzy Annuals
Imperata cylindrica rubra Japanese blood grass Groundcover
Imperata cylindrica var. koenigii Japanese blood grass Ornamental Grass
Incarvillea Hardy gloxinia Summer Bulbs
Indigofera amblyantha Indigofera Shrubs
Indigofera decora Chinese indigo Shrubs
Indigofera heterantha Himalayan indigo Shrubs
Indigofera kirilowii Kirilow indigo Shrubs
Inula britannica L. British elecampane, British yellowhead, Elecampane, Meadow fleabane Herbs, Perennials
Inula helenium Elecampane Wildflowers
Ipheion uniflorum Spring Starflower Perennial Bulbs, Spring Bulbs
Ipomea alba Moonflower, Moonvine Vines
Ipomea batatas Water spinach Annuals, Water Garden
Ipomea purpurea Japanese morning glory, Morning glory Vines
Ipomea quamoclit Cypress vine Vines
Ipomoea pandurata Morning glory, Wild potato vine, Wild sweet potato vine Vines, Wildflowers
Ipomoea purpurea Common morning glory Vines
Ipomoea sagittata Morning glory Vines
Ipomoea spp. Cypress vine, Morning glory Annuals, Perennials, Vines, Wildflowers
Ipomoea tricolor Heavenly blue morning glory, Morning glory, Pearly gates morning glory Poisonous Plants, Vines
Ipomoea x batatas Sweet potato vine Annuals, Vines
Ipomoea x multifida Cardinal climber, Hearts and honey vine Vines
Ipomopsis rubra Scarlet gilia, Standing cypress Annuals, Wildflowers
Iresine herbstii Beefsteak, Bloodleaf, Chicken gizzard, Formosa bloodleaf Annuals, Perennials
Iris brevicaulis Lamance iris, Short-stemmed iris Poisonous Plants, Wildflowers
Iris cristata Crested dwarf iris, Iris Native Plants, Perennials, Poisonous Plants, Wildflowers
Iris cristata alba White crested dwarf iris Poisonous Plants, Wildflowers
Iris ensata Japanese water iris Perennials, Poisonous Plants, Spring Bulbs, Water Garden
Iris germanica Bearded iris, German iris, Rhizomatous iris Perennials, Poisonous Plants, Summer Bulbs
Iris hexagona Dixie iris Poisonous Plants, Wildflowers
Iris hollandica Dutch Iris Poisonous Plants, Spring Bulbs
Iris reticulata Dwarf Iris, Species Iris Poisonous Plants, Spring Bulbs
Iris reticulata 'Harmony' Dwarf Iris, Species Iris Perennial Bulbs, Poisonous Plants
Iris spp. Iris Poisonous Plants
Iris tectorum Japanese roof iris, Roof iris, Wall iris Groundcover, Perennials, Poisonous Plants
Iris versicolor Larger blue flag iris Poisonous Plants, Wildflowers
Iris virginica Southern blue flag iris Native Plants, Poisonous Plants, Water Garden, Wildflowers
Iris xiphiodes, I. angelica, I. latifolia English Iris Poisonous Plants, Spring Bulbs
Isotria verticillata Large whorled pogonia Wildflowers
Itea chinensis Chinese sweetspire Shrubs
Itea virginica Itea, Virginia sweet spire, Virginia sweetspire, Virginia willow Native Plants, Shrubs
Ixia African Corn-Lily, Wand flower Summer Bulbs
Ixia hybrids African Corn Lily, Corn flower Spring Bulbs
Ixiolirion montanum (I. pallasii) Ixiolirion Perennial Bulbs, Spring Bulbs
Ixora coccinea Flame of the woods, Ixora, Jungle flame Shrubs
Jasminum beesianum Beesianum jasmine Vines
Jasminum floridum Showy jasmine Shrubs
Jasminum fruticans Wild jasmine Shrubs
Jasminum humile Italian yellow jasmine Shrubs