Calamagrostis

Calamintha

Caldcluvia

Calliandra

Callicarpa

Callistemon

Calocedrus

Caltha

Calycanthus

Camassia

Camellia

Campanula

Campsis

Camptotheca

Caragana

Cardamine

Cardiandra

Cardiocrinum

Carex

Carpenteria

Carpinus

Carum

Carya

Caryopteris

Cassia

Castanea

Castanopsis

Catalpa

Catananche

Ceanothus

Cedrus

Celtis

Cenolophium

Centaurea

Centranthus

Cephalanthus

Cephalaria

Cephalotaxus

Cerastium

Ceratostigma

Cercidiphyllum

Cercis

Cestrum

Chaenomele

Chaenomeles

Chamaecyparis

Chamaedaphne

Chamaemelum

Chamerion

Chasmanthium

Cheilanthes

Chelidonium

Chelone

Chenopodium

Chiastophyllum

Chimonanthus

Chionanthus

Chionochloa

Chionodoxa

Chitalpa

Choisya

Chosenia

Chrysanthemum

Chrysogonum

Chrysopsis

Cichorium

Cinnamomum

Cirsium

Cistus

Citharexylum

Citronella

Cladrastis

Claytonia

Clematis

Clerodendrum

Clethra

Cleyera

Cneorum

Cocculus

Colchicum

Colletia

Colocasia

Colquhounia

Colutea

Comanthosphace

Conoclinium

Convallaria

Convolvulus

Coprosma

Cordia

Cordyline

Coreopsis

Cornus

Corokia

Coronilla

Correa

Cortaderia

Corydalis

Corylopsis

Corylus

Cosmos

Cotinus

Cotoneaster

Crambe

Crataegomespilus

Crataegus

Crinodendron

Crocosmia

Cruciata

Cryptomeria

Cryptotaenia

Cunninghamia

Cupressocyparis

Cupressus

Cyclamen

Cyclocarya

Cydonia

Cymbalaria

Cymbopogon

Cynanchum

Cynara

Cyphomandra

Cyrilla

Cyrtomium

Cytisus