Climbing Aloe Climbing Bleeding Heart (spp.)
Climbing Bleeding Heart 'Athen's Yellow' Climbing Hemp Vine
Climbing Hempweed Climbing Knotweed
Climbing Nightshade Climbing Snapdragon (spp.)
Climbing Snapdragon 'Jewels' Clintonia, White
Clivia, Yellow-flowered Clock Vine, Orange
Closed Gentian Clotbur
Clove Pink (spp.) Clover, Dutch (spp.)
Clover, Dutch 'Atropurpureum' Clover, Dutch 'Wheatfen'
Clover, Indoor 'Party Time' Clover, Indoor 'Rubiginosa'
Clover, Indoor 'Ruby' Clover, Lucky
Clover, Purple Dutch (spp.) Clover, Purple Dutch 'Atropurpureum'
Clover, Purple Dutch 'Wheatfen' Clover, Purple Prairie
Clover, White (spp.) Clover, White 'Atropurpureum'
Clover, White 'Wheatfen' 'Clown™ Mix' Wishbone Flower
Club Moss Clubhair Mariposa Lily
Clump Verbena 'Rosea' Clumpfoot Cabbage
Clumping Foamflower (spp.) Clumping Foamflower 'Brandywine'
Clumping Foamflower 'Dark Eyes' Clumping Foamflower 'Ink Blot'
Clumping Foamflower 'Oakleaf' Clumping Foamflower 'Pink Bouquet'
Clumping Foamflower 'Running Tapestry' Clumping Foamflower 'Winterglow'
Clustered Bellflower (spp.) Clustered Bellflower 'Joan Elliott'
Clustered Bellflower 'Superba' 'Clyde Redmond' Louisiana Iris
Coast Aloe Coast Prickly Pear
Coastal Agave Coastal Century Plant
Coastal Cholla Coastal Flax (spp.)
Coastal Flax 'Apricot Queen' Coastal Flax 'Dazzler'
Coastal Flax 'Pink Stripe' Coastal Flax 'Purpureum'
Coastal Flax 'Rainbow Sunrise (Maori Queen)' Coastal Flax 'Surfer'
Coastal Prickly Pear Cactus Coastal Strand Wormwood (spp.)
Coastal Strand Wormwood 'David's Choice' Coastal Tidy Tips
Coat Flower 'Cobalt Blue' Japanese Water Iris
Cobbitty Daisy (spp.) Cobbitty Daisy 'Molimba® Pink'
Cobbitty Daisy 'Vanilla Butterfly®' 'Cobra' Common Torch Lily: Kniphofia
Cobra Jack Cobra Lily
Cobra Lily: californica Cobweb Hen and Chicks
Cobweb Houseleek (spp.) Cobweb Houseleek 'Red Cobweb'
Cobweb Houseleek: arachnoideum tomentosum Cobweb Spiderwort
'Coccineus' Creeping Thyme 'Coccineus' Jupiter's Beard
'Coccineus' Wild Thyme Cocklebur, Common
Cocklebur, Large Cocklebur, Rough
Cocklebur: repens Cockscomb (spp.)
Cockscomb 'Bombay Purple' Cockscomb 'Bombay Yellow Gold'
Cockscomb 'Jewel Box Golden Yellow' Cockscomb 'Jewel Box Salmon'
Cockscomb 'Kardinal Improved' Cockscomb 'Karume'
Cockscomb 'Prestige Scarlet' Cockscomb 'Purple with purple leaves'
Cockscomb 'Red Velvet' Cockscomb 'Startrek Rose Pink'
Cockscomb, Green 'Coconut' Geranium: Pelargonium
'Coerulea' Giant Blue Camas 'Coffee Cream' Pot Marigold
Coin Leaf Peperomia