• (1) C - Cabbage
• (2) Cabbage - Cacaoeiro
• (3) Cacaoeiro - Cajueiro Bravo
• (4) Cajueiro Bravo - California Cordgrass
• (5) California Cottonrose - California Washingtonia
• (6) California Water-Willow - Camellia 'nuccio's Pearl'
• (7) Camellia 'trewithen Pink' - Canadian Hawthorn
• (8) Canadian Hemlock - Candy Cactus
• (9) Candy Cane Bamboo - Cantaloupe
• (10) Cantaloupe - Canyon Mock Orange
• (11) Canyon Mock-Orange - Capim-Tó (Brazil)
• (12) Capim-Timóteo - Caraway-Leaf Desert-Parsley
• (13) Caraway-Leaf Gilia - Caribbean Orchid Daylily
• (14) Caribbean Peach Explosion Daylily - Carolina Draba
• (15) Carolina Elephant-Foot - Carretones
• (16) Carretto - Cas Dulce
• (17) Cas Dulce (Costa Rica) - Castle Creped Bouquet Daylily
• (18) Castle Crown Tomato - Catjang Cowpea
• (19) Catjang Pea - Cayennekirsche
• (20) Cayennekirsebær - Celery
• (21) Celery - Cerbera
• (22) Cerberus Daffodil - Chêne Noir
• (23) Chêne Pédonculé - Champagne Encore Intermediate Bearded Iris
• (24) Champagne Frills Daylily - Chapote
• (25) Chapote - Chavi
• (26) Chavleri - Cherry Breeze Daylily
• (27) Cherry Bright Daylily - Chicagoland Green " Boxwood
• (28) Chicalá (Colombia) - Chilean Jessamine
• (29) Chilean Lantern Tree - Chinese Aster
• (30) Chinese Aster - Chinese Juniper
• (31) Chinese Juniper - Chinese Windmolenpalm
• (32) Chinese Wingnut - Chiute
• (33) Chivalry Daffodil - Christine Harper Daffodil
• (34) Christine Kelly Daylily - Church Stoke Standard Dwarf Bearded Iris
• (35) Church Town Daffodil - Cinnamomum-Leafed Viburnum
• (36) Cinnamon - Citronella Daffodil
• (37) Citronella Di Ceylon - Clavalier De Bunge
• (38) Clavalier De L´inde - Clemenceau Daffodil
• (39) Clemenceaux Daylily - Clix Daffodil
• (40) Clo Greene Daylily - Clusterhead
• (41) Clusterhead Pink - Coastalplain Palafox
• (42) Coastalplain Panicgrass - Codiaeum
• (43) Codiaeum - Coleus
• (44) Coleus - Colocynth
• (45) Colocynth - Comanche Crapemyrtle
• (46) Comanche Daffodil - Common Chinese Privet
• (47) Common Chinese Privet - Common Laburnum
• (48) Common Lac Insect - Common Sow Thistle
• (49) Common Sow-Thistle - Con Brio Daffodil
• (50) Con Brio Daylily - Constantia Rosea Rhododendron
• (51) Constantine Daffodil - Copoasu
• (52) Copoasú - Coral Dropseed
• (53) Coral Erythrina - Corde Violon
• (54) Corded Rose Daylily - Coroa-De-Espinho
• (55) Coroa-De-Rei - Cos
• (56) Cos - Countach Daylily
• (57) Counter Point Hosta - Cow Pea
• (58) Cow Pea - Crackington Daffodil
• (59) Cracklin Burgundy Tall Bearded Iris - Cream Edge Hosta
• (60) Cream Edge Seer Hosta - Creeping St. Johnswort
• (61) Creeping Stalkgrass - Cretan Brake
• (62) Cretan Brake - Crocosmia
• (63) Crocosmia - Cryptanthus
• (64) Cryptanthus - Cucumber
• (65) Cucumber - Cudjoe-Wood
• (66) Cudrang - Curatelle D'amérique
• (67) Curba Antioqueña - Cushion Daisy
• (68) Cushion Daisy - Cycad
• (69) Cycad - Czarina Daffodil
• (70) Czarina Daylily - Ç?or Bo?bodž