Cacalia
Caccinia
Cadia
Caesalpinia
Caiophora
Cakile
Calamagrostis
Calandrinia
Calanthe
Calceolaria
Calendula
Calibrachoa
Calicotome
Calliandra
Callianthemum
Callicarpa
Callirhoe
Calochortus
Calodendrum
Calonyction
Caltha
Calycanthus
Calycera
Calylophus
Calypso
Calystegia
Camassia
Camellia
Camissonia
Campanula
Campsis
Campylandra
Canna
Capparis
Caragana
Cardamine
Cardiandra
Cardiocrinum
Cardiospermum
Carduncellus
Carduus
Carex
Carlina
Carpenteria
Carpobrotus
Carthamus
Carum
Carya
Caryopteris
Cassia
Cassiope
Castilleja
Catalpa
Catananche
Caucalis
Caulophyllum
Cautleya
Ceanothus
Cedrela
Cedrus
Celastrus
Celosia
Celsia
Celtis
Centaurea
Centaurium
Centranthus
Centratherum
Cephalanthera
Cephalanthus
Cephalaria
Cephalotaxus
Cerastium
Cerasus
Ceratocephala
Ceratonia
Ceratostigma
Cercidiphyllum
Cercidium
Cercis
Cerinthe
Cestrum
Chaenomeles
Chaenorhinum
Chaerophyllum
Chaetanthera
Chamaebatiaria
Chamaecrista
Chamaecyparis
Chamaecytisus
Chamaedaphne
Chamaelirium
Chamaerops
Charieis
Chartolepis
Chasmanthe
Cheilanthes
Chelidonium
Chelone
Chelonopsis
Chesneya
Chimaphila
Chimonanthus
Chionanthus
Chionocharis
Chionodoxa
Chirita
Chironia
Chitalpa
Chloraea
Chloranthus
Chlorophytum
Choisya
Chorisia
Chorispora
Chrysanthemoides
Chrysanthemum
Chrysocoma
Chrysogonum
Chrysopsis
Chrysosplenium
Chuquiraga
Chusquea
Cicerbita
Cichorium
Cimicifuga
Cinnamomum
Cionura
Circaea
Cirsium
Cistanthe
Cistus
Citrus
Cladanthus
Cladastris
Cladium
Clarkia
Clematis
Cleome
Clerodendrum
Clethra
Clinanthus
Clintonia
Clivia
Cneorum
Cobaea
Coccinia
Cocculus
Cochliostema
Codonopsis
Codonorchis
Coeloglossum
Coix
Colchicum
Colletia
Colliguaja
Collinsia
Collomia
Colocasia
Colquhounia
Colutea
Coluteocarpus
Comanthosphace
Comarum
Commelina
Comptonia
Coniogramme
Conium
Consolida
Convallaria
Convolvulus
Copernicia
Copiapoa
Corallodiscus
Corallorhiza
Coreopsis
Coriaria
Cornus
Cornutia
Coronilla
Corryocactus
Cortaderia
Cortusa
Corycium
Corydalis
Corydothymus
Cosmos
Cotinus
Cotoneaster
Cotula
Cotyledon
Cousinia
Crambe
Crassula
Crataegus
Craterocapsa
Cremanthodium
Crepis
Crinodendron
Crinum
Crocosmia
Crocus
Cruciata
Cruckshanksia
Cryptomeria
Cucubalus
Cucumis
Cudrania
Cumulopuntia
Cunninghamia
Cunonia
Cuphea
Cupressus
Curtonus
Cuscuta
Cussonia
Cyananthus
Cyanara
Cyathea
Cyclamen
Cycnium
Cylindropuntia
Cymbalaria
Cynanchum
Cynara
Cynoglossum
Cynomorium
Cyperus
Cyphomandra
Cypripedium
Cyrtanthus
Cysticapnos
Cytisus