Calamagrostis

Calamintha

Caldcluvia

Callicarpa

Callisia

Callistemon

Calocedrus

Calothamnus

Caltha

Calycanthus

Calylophus

Camassia

Camellia

Campanula

Campsis

Camptotheca

Canna

Caragana

Cardamine

Cardiandra

Cardiocrinum

Carex

Carpenteria

Carpinus

Carum

Carya

Caryopteris

Cassia

Castanea

Castanopsis

Catalpa

Catananche

Ceanothus

Cedrus

Celtis

Cenolophium

Centaurea

Centaurium

Centranthus

Cephalanthus

Cephalotaxus

Cerastium

Ceratostigma

Cercidiphyllum

Cercis

Cestrum

Chaenomeles

Chamaecyparis

Chamaedaphne

Chamaemelum

Chasmanthium

Chelone

Chelonopsis

Chiastophyllum

Chilopsis

Chimonanthus

Chionanthus

Chionochloa

Chitalpa

Choisya

Chosenia

Chrysanthemum

Chrysogonum

Chrysosplenium

Cichorium

Cirsium

Cistus

Citharexylum

Citronella

Cladrastis

Clematis

Clerodendrum

Clethra

Cocculus

Colletia

Colocasia

Colquhounia

Colutea

Comanthosphace

Conoclinium

Convallaria

Convolvulus

Coprosma

Cordia

Cordyline

Coreopsis

Cornus

Corokia

Coronilla

Correa

Cortaderia

Corydalis

Corylopsis

Corylus

Corynocarpus

Cotinus

Cotoneaster

Crambe

Crataegomespilus

Crataegosorbus

Crataegus

Crinodendron

Crinum

Crocosmia

Cryptomeria

Cudrania

Cupressocyparis

Cupressus

Cyathea

Cyclamen

Cydonia

Cymbalaria

Cynanchum

Cynara

Cyrilla

Cyrtomium

Cytisus