Southeastern Arizona plant common names that begin with C.
- Cactus Apple
- Cactus, Arizona Barrel
- Cactus, Beehive
- Cactus, Candy Barrel
- Cactus, Christmas
- Cactus, Cinnamon
- Cactus, Claret-cup
- Cactus, Crimson Hedgehog
- Cactus, Fishhook Barrel
- Cactus, Graham's Nipple
- Cactus, Macdougal's Nipple
- Cactus, Pincushion
- Cactus, Pinkflower Hedgehog
- Cactus, Polka Dot
- Cactus, Rainbow
- Cactus, Rainbow Hedgehog
- Cactus, Scarlet Hedgehog
- Cactus, Southwestern Barrel
- Cactus, Tuna
- Cactus, Walking Stick
- Cactus, Walkingstick
- Calabazilla
- Caliche Globemallow
- California Bluebell
- California Buckwheat
- California Creamcups
- California Loosestrife
- California Mustard
- California Poppy
- California Suncup
- Caltrop
- Caltrop, Arizona
- Camphor Weed
- Camphorweed
- Campion, Scouler's
- Campion, Simple
- Campion, Sleepy
- Canada Fleabane
- Canada Violet
- Canadian Horseweed
- Canadian White Violet
- Canaigre Dock
- Candlewood
- Candy Barrel Cactus
- Candy Barrelcactus
- Cane Cholla
- Canyon Clarkia
- Canyon Grape
- Canyon Maple
- Canyon Morning Glory
- Canyon Morning-glory
- Canyon Ragweed
- Cape Marigold, Glandular
- Cardinal Flower
- Cardinal Monkey-flower
- Cardinalflower
- Carelessweed
- Carlowrightia, Arizona
- Carolina Bristlemallow
- Carolina Modiola
- Carrot, American Wild
- Carrot, Southwestern
- Cassia, Coues'
- Cassia, Coves'
- Cassia, Shrubby
- Catalina Indian Paintbrush
- Catchfly, Scouler
- Catchfly, Scouler's
- Catchfly, Simple
- Catchfly, Sleepy
- Catchweed Bedstraw
- Catclaw Acacia
- Catclaw Mimosa
- Caterpillarweed
- Ceanothus, Desert
- Ceanothus, Fendler
- Ceanothus, Fendler's
- Centaury, Arizona
- Century Plant, Goldenflower
- Century Plant, Palmer's
- Century Plant, Schott's
- Cereus, Desert Night-blooming
- Cereus, Night Blooming
- Cereus, Nightblooming
- Cespitose Evening-primrose
- Chain Fruit Cholla
- Chainfruit Cholla
- Chamise
- Chamiso
- Chamize
- Cheese Weed
- Cheeseplant
- Cheeseweed
- Cheeseweed Mallow
- Chenille Prickly Pear
- Chenille Pricklypear
- Chia
- Chicory, Desert
- China Lettuce
- Chinese Lantern
- Chiricahua Mountain Sandmat
- Cholla, Arizona Pencil
- Cholla, Buck-horn
- Cholla, Buckhorn
- Cholla, Cane
- Cholla, Chain Fruit
- Cholla, Chainfruit
- Cholla, Christmas
- Cholla, Devil
- Cholla, Devil's
- Cholla, Jumping
- Cholla, Jumping
- Cholla, Pencil
- Cholla, Staghorn
- Cholla, Stanly Club
- Cholla, Teddy Bear
- Cholla, Teddybear
- Christmas Cactus
- Christmas Cholla
- Chuckwalla's Delight
- Chuparosa
- Chuparosa
- Cilantro, Summer
- Cinnamon Cactus
- Cinquefoil, Red
- Cinquefoil, Scarlet
- Clammy-weed
- Clammyweed, Red-whisker
- Clammyweed, Redwhisker
- Clammyweed, Roughseed
- Claret-cup Cactus
- Clarkia, Canyon
- Clarkia, Willow-herb
- Clasping Henbit
- Cleavers
- Cleaverwort
- Cleftleaf Wildheliotrope
- Clematis, Drummond's
- Cliff Brake, Spiny
- Cliffbrake, Spiny
- Cliffrose, Stansbury
- Cliffrose, Stansbury's
- Climbing Milkweed
- Climbing Snapdragon
- Climbing Wartclub
- Cloak Fern, Standley's
- Cloak Fern, Star
- Cloakfern, Cochise Scaly
- Clover, Annual Yellow Sweet
- Clover, Black Medic
- Clover, Jackass
- Clover, White Sweet
- Clover, Yellow Sweet
- Club Cholla, Stanly
- Clustervine, Pringle's
- Coach Whip
- Coachwhip
- Cochise Scaly Cloakfern
- Cockerell's Sedum
- Cockerell's Stonecrop
- Cocklebur, Rough
- Cockleburr, Common
- Cockroach Plant
- Cockroachplant
- Coldenia, Ratear
- Coldenia, Shrubby
- Colorado Bur
- Colorado Desert Mistletoe
- Columbine, Golden
- Columbine, Yellow
- Columnar Prairie Coneflower
- Common Bedstraw
- Common Bluemustard
- Common Buttonbush
- Common Cockleburr
- Common Cowparsnip
- Common Dandelion
- Common Elderberry
- Common Fiddleneck
- Common Monkey Flower
- Common Monkeyflower
- Common Mullein
- Common Purslane
- Common Russianthistle
- Common Scouring Rush
- Common Sotol
- Common Sow-thistle
- Common Sowthistle
- Common Sunflower
- Common Unicorn Plant
- Common Wild Rose
- Coneflower, Columnar Prairie
- Coneflower, Long-headed
- Coneflower, Upright Prairie
- Cooper's Broomrape
- Cooper's Paperflower
- Copper Globemallow
- Copper Purslane
- Copperleaf, Lindheimer's
- Copperleaf, Shrubby
- Coral Bean, Southwestern
- Coral Bells
- Coralbean
- Coralbells
- Coralito
- Coriander, Bolivian
- Cosmos, Southwestern
- Cotton, Desert
- Cotton, Thurber's
- Cottonwood, Fremont
- Cottonwood, Fremont's
- Coues' Cassia
- Coulter's Brickellbush
- Coulter's Brickellia
- Coulter's Hibiscus
- Coulter's Lupine
- Coulter's Wrinklefruit
- Coves' Cassia
- Cow Parsnip
- Cow-parsnip
- Cowboy's Red Whiskers
- Cowparsnip, Common
- Cowpen Daisy
- Crag Lily
- Craglily, Torrey's
- Cream Cups
- Creamcups
- Creamcups, California
- Creeping Jenny
- Creeping Mallow
- Creeping Oxalis
- Creeping Wood Sorrel
- Creeping Woods
- Creeping Woodsorrel
- Creeping Zinnia, Abert's
- Creeping Zinnia, Albert's
- Creosote Bush
- Creosotebush
- Crested Anoda
- Crestrib Morning Glory
- Crestrib Morning-glory
- Crimson Fountaingrass
- Crimson Hedgehog Cactus
- Crimson Monkey Flower
- Crinklemat, Woody
- Crossflower
- Crow Poison
- Crownbeard, Golden
- Crownpod Purslane
- Crowpoison
- Cryptantha
- Cryptantha, Wing-nut
- Cryptantha, Wingnut
- Cucumber, Wild
- Curly Bladder Mallow