Calamagrostis

Calamintha

Caldcluvia

Callicarpa

Callistemon

Caltha

Calycanthus

Camassia

Camellia

Campanula

Campsis

Caragana

Cardamine

Cardiandra

Carex

Carpinus

Carpodetus

Carya

Caryopteris

Cassia

Castanea

Castanopsis

Catalpa

Catananche

Ceanothus

Cedrus

Cenolophium

Centaurea

Centranthus

Cephalanthus

Cephalaria

Cephalotaxus

Cerastium

Ceratostigma

Cercidiphyllum

Cercis

Cestrum

Chaenomeles

Chamaecyparis

Chamaedaphne

Chasmanthium

Cheilanthes

Chelidonium

Chelone

Chiastophyllum

Chilopsis

Chimonanthus

Chionanthus

Chionochloa

Chitalpa

Chloranthus

Choisya

Chrysanthemum

Chrysogonum

Chrysosplenium

Cichorium

Cichrium

Cirsium

Cistus

Citharexylum

Cladrastis

Clematis

Clerodendrum

Clethra

Cleyera

Cnidium

Cocculus

Coleus

Colletia

Collinsonia

Colocasia

Colquhounia

Colutea

Comanthosphace

Conoclinium

Convallaria

Convolvulus

Coprosma

Cordia

Cordyline

Coreopsis

Coriandrum

Cornus

Corokia

Coronilla

Correa

Cortaderia

Corydalis

Corylopsis

Corylus

Cosmos

Cotinus

Cotoneaster

Crambe

Craspedia

Crataegus

Crinodendron

Crocosmia

Cruciata

Cryptomeria

Cupressocyparis

Cupressus

Cyathea

Cyclamen

Cydonia

Cynara

Cyrilla

Cyrtomium

Cytisus