Lilac, Catalina Mountain (spp.) Lilac, Catalina Mountain 'Trewithen Blue'
Lilac, West Indian Lilac, Wild (spp.)
Lilac, Wild 'Carmel Creeper' Lilac, Wild 'Hurricane Point'
Lilac, Wild 'Louis Edmunds' Lily, American Turk's Cap
Lily, Atamasca Lily, Avalanche
Lily, Aztec 'Superba' Lily, Bog
Lily, Canada Lily, Canadian
Lily, Columbia Lily, Common Trout
Lily, Dogtooth Lily, Fawn
Lily, Glacier Lily, Gumbo
Lily, Himalayan Foxtail Lily, Jacobean 'Superba'
Lily, Lambstongue Trout Lily, Leopard
Lily, Meadow Lily, One Day
Lily, Oregon Lily, Pagoda
Lily, Panther Lily, Pond (spp.)
Lily, Rain Lily, Speckled Wood
Lily, St. James 'Superba' Lily, String
Lily, Tiger Lily, Trout 'Citronella'
Lily, Yellow Trout Lily: americanum, Swamp
Lily: californica, Cobra Lily: gloriosa, Palm (spp.)
Lily: gloriosa, Palm Variegated Limber Pine (spp.)
Limber Pine Blue Lime Prickley Ash
Limestone Fern (spp.) Limestone Fern 'Plumosum'
Linden, American (spp.) Linden, American 'Pyramidalis'
Linden, American 'Redmond' Lingonberry
Lion's Tail Agave (spp.) Lion's Tail Agave 'Nova'
Lisianthus (spp.) Lisianthus 'Blue Lisa'
Lisianthus 'Forever Blue' Lisianthus 'Yodel Blue'
Little Bluestem (spp.) Little Bluestem 'The Blues'
'Little Elfie' American Arborvitae Little Flowered Agave
'Little Gem' American Arborvitae 'Little Gem' Southern Magnolia
'Little Giant' American Arborvitae 'Little Goblin™' Winterberry: verticillata
Little Leaf Cordia 'Little Linda' Mountain Laurel
'Little Princess' Summer Phlox Little Sur Manzanita
Littleleaf Leadtree Littleleaf Leucaena
Live Forever: farinosa Live Oak (spp.)
Live Oak 'Cathedral Oak™ (Shadowlawn)' Live Oak 'Heritage'
Live Oak 'Highrise' Live Oak 'Millenaire Live Oak™'
Live Oak: chrysolepis Live Oak: emoryi
'Livida' Creeping Juniper Lizard's Tail
'Lizzy' Summer Phlox Lobed Tickseed (spp.)
Lobed Tickseed Dwarf Lobed Tickseed 'Zamphir'
Lobelia, Big Blue (spp.) Lobelia, Great Blue (spp.)
Lobelia, Great (spp.) Lobelia, Sierra Madre
Lobelia: laxiflora angustifolia Loblolly Pine (spp.)
Loblolly Pine Dwarf Lobster Plant (spp.)
Lobster Plant 'Peterstar Silver Bells' Lobster Plant 'V-14 Pink'
Lobster Plant 'V-17 Angelika White' Lobster Plant 'Winter Rose'