Holly Grape, California Holly Grape, Oregon (spp.)
Holly Grape, Oregon 'Compactum' Holly Grevillea
Holly Leaf Mountain Lilac 'Blue Jeans' Holly Oak (spp.)
Holly Oak 'Fordii' Holly, California (spp.)
Holly, Chinese 'Burfordii' Holly, Horned 'Burfordii'
Holly, Oregon (spp.) Holly, Oregon 'Compactum'
Hollyhock, Desert Hollyleaf Cherry
'Hollywood' Chinese Juniper Honey Mesquite
Honey Mesquite: glandulosa torreyana Honey Myrtle, Gray
Honey Myrtle: nesophila, Showy Honeysuckle, Cape 'Apricot'
Honeysuckle, Chuparosa Honeysuckle, Scarlet Cape
Honeysuckle, Yellow Cape Hopbush (spp.)
Hopseed Bush (spp.) Horizontal Juniper 'Blue Rug'
Horned Holly 'Burfordii' Horsechestnut, California (spp.)
Horses Tail 'Houston' Crapemyrtle: indica
'Howard McMinn' Sonoma Manzanita Huisache
Humming Bird's Trumpet (spp.) Hummingbird Bush
Hummingbird Trumpet Hummingbird Yucca
Hybrid Rock Rose (spp.) Hybrid Rock Rose 'Grayswood Pink'
Ice Plant 'Brilliant' Ice Plant, Trailing
Ice Plant: brunnthaleri 'Pink' Ice Plant: brunnthaleri 'Yellow'
Ice Plant: cooperi Ice Plant: lavisiae
Ice Plant: lutea, Rocky Point Ice Plant: speciosum
Iceplant, Rosea Idaho Fescue 'Siskiyou Blue'
'Idahoensis' Locust 'Imagination' Moss Verbena
Immortelle 'Silver Star' Imodi Pine
'Imperial' Thornless Honey Locust Incienso
India Palm Indian Fig Prickly Pear Cactus
Indian Hawthorn 'Clara' Indian Hawthorn 'Fascination'
Indian Hawthorn 'Olivia' Indian Mallow, Palmer's
'Indian Summer' Black-eyed Susan Indigo Bush
'Indigo Compacta' Forget-me-not Interior Live Oak
'Irene Paterson' Kohuhu Iris, Douglas
Iris, Evergreen Iris, Mountain
Iris, New Zealand 'Irish Eyes' Black-eyed Susan
Ironwood, Desert Ironwood: tesota
Island Alumroot Island Bush Snapdragon
Island Gooseberry Island Oak
Island Shrub Mallow Island Tree Poppy
Islay Italian Stone Pine
Jacaranda 'Jack Catlin' Aeonium