Caesalpina

Calamagrostis

Calamintha

Calanthe

Calathea

Calceolaria

Calendula

Calla

Calliandra

Callianthemum

Callicarpa

Callistemon

Callitriche

Calluna

Calocedrus

Caltha

Calycanthus

Camassia

Camellia

Campanula

Campsis

Canna

Caragana

Cardamine

Carduus

Carex

Carlina

Carpenteria

Carpinus

Carum

Carya

Caryopteris

Caryota

Cassinia

Cassiope

Castanea

Casuarina

Catalpa

Catananche

Caulophyllum

Ceanothus

Cedrus

Ceiba

Celastrus

Celmisia

Celosia

Centaurea

Centranthus

Cephalanthus

Cephalaria

Cephalotaxus

Cerastium

Ceratonia

Ceratostigma

Cercidiphyllum

Cercis

Cerinthe

Cestrum

Chaenomeles

Chaerophyllum

Chamaecyparis

Chamaecyparisthyoides

Chamaecytisus

Chamaedorea

Chamaemelum

Chamaerops

Chamerion

chamomile

Chasmanthium

Chelidonium

Chelone

Chiastophyllum

Chimonanthus

Chionanthus

Chionochloa

Chionodoxa

Choisya

Chrysanthemum

Chrysolepis

Chrysosplenium

Chusquea

Cichorium

Cirsium

Cistus

Cladrastis

Claytonia

Clematis

Cleome

Clerodendrum

Clethra

Cleyera

Clianthus

Clivia

Cobaea

Coccoloba

Cochlearia

Colchicum

Colletia

Colocasia

Colutea

Consolida

Convallaria

Convolvulus

Cordyline

Coreopsis

Coriandrum

Cornus

Corokia

Coronilla

Correa

Cortaderia

Cortusa

Corydalis

Corylopsis

Corylus

Cosmos

Cotinus

Cotoneaster

Crambe

Crataegus

Crataemespilus

Crinodendron

Crinum

Crocosmia

Crocus

Cryptomeria

Cuphea

Cupressocyparis

Cupressus

Cycas

Cyclamen

Cydonia

Cynara

Cynoglossum

Cyperus

Cyrtomium

Cyrtostachys

Cystopteris

Cytisus