Calamagrostis

Calamintha

Caldcluvia

Calliandra

Callicarpa

Callistemon

Caltha

Calycanthus

Camassia

Camellia

Campanula

Campsis

Caragana

Cardamine

Cardiandra

Carex

Carlina

Carpinus

Carum

Carya

Caryopteris

Cassia

Castanea

Castanopsis

Catalpa

Catananche

Ceanothus

Cedrus

Cenolophium

Centaurea

Centranthus

Cephalanthus

Cephalaria

Cephalotaxus

Cerastium

Ceratostigma

Cercidiphyllum

Cercis

Cestrum

Chaenomele

Chaenomeles

Chamaecyparis

Chamaedaphne

Chamerion

Chasmanthium

Cheilanthes

Chelidonium

Chelone

Chimonanthus

Chionanthus

Chionochloa

Chionodoxa

Choisya

Chrysanthemum

Chrysogonum

Chrysopsis

Cichorium

Cirsium

Cistus

Citharexylum

Citronella

Citrus

Cladrastis

Claytonia

Clematis

Clerodendrum

Clethra

Cleyera

Cneorum

Cnidium

Cocculus

Colchicum

Coleus

Colocasia

Colquhounia

Colutea

Comanthosphace

Conoclinium

Convallaria

Convolvulus

Coprosma

Cordia

Cordyline

Coreopsis

Cornus

Corokia

Coronilla

Correa

Cortaderia

Corydalis

Corylopsis

Corylus

Cosmos

Cotinus

Cotoneaster

Crambe

Crataegus

Crinodendron

Crocosmia

Crocus

Cruciata

Cryptomeria

Cryptotaenia

Cupressocyparis

Cupressus

Cyathea

Cyclamen

Cyclocarya

Cydonia

Cymbalaria

Cymbopogon

Cynanchum

Cyphomandra

Cyrilla

Cyrtomium

Cytisus