This is a partial list of garden plants, plants that can be cultivated in gardens in North America, listed alphabetically by genus.
A
Abelia Abeliophyllum (white forsythia) Abelmoschus (okra) Abies (fir) Abroma Abromeitiella (obsolete) Abronia (sand verbena) Abrus Abutilon Acacia (wattle) Acaena Acalypha Acanthaceae Acanthodium Acantholimon Acanthopale Acanthophoenix Acanthus Acca Acer (maple) Achariaceae Achillea (yarrow) Achimenantha (hybrid genus) Achimenes Acinos (calamint) Aciphylla Acmena Acoelorraphe (saw palm) Acokanthera Aconitum (aconite, monkshood) Acorus Acradenia Acrocomia Actaea (baneberry) Actinidia (kiwifruit) Ada orchid genus Adansonia Adenandra Adenanthos Adenia Adenium Adenocarpus Adenophora Adenostoma Adiantum (maidenhair fern) Adlumia Adonis Adromischus Aechmea Aegopodium Aeonium Aerangis (an orchid genus) Aerides (an orchid genus) Aeschynanthus Aesculus Aethionema Afgekia Agapanthus Agapetes Agastache Agathis Agathosma Agave Ageratum Aglaia Aglaomorpha Aglaonema Agonis Agrimonia Agrostemma (corn cockle) Agrostis Aichryson Ailanthus (tree of heaven, etc.) Aiphanes Aira (hair grass) Ajania Ajuga (bugleweed) Akebia Alangium Alberta Albizia (silk tree) Albuca Alcea (hollyhock) Alchemilla Aldrovanda Aleurites × Aliceara (hybrid genus) Alisma (water plantain) Alkanna Allagoptera Allamanda Allium (onion) Allocasuarina Allosyncarpia Alloxylon Alluaudia Alnus (alder) Alocasia Aloe Aloinopsis Alonsoa Alopecurus (foxtail grass) Aloysia Alphitonia Alpinia (ginger lily) Alsobia Alstonia Alstroemeria Alternanthera Althaea Alyogyne Alyssum Alyxia Amaranthus Amarcrinum (hybrid genus) Amarygia (hybrid genus) Amaryllis Amberboa Amelanchier Amesiella Amherstia Amicia Ammi Ammobium Amorpha Amorphophallus Ampelopsis Amsonia Anacampseros Anacardium Anacyclus Anagallis (pimpernel) Ananas (pineapple) Anaphalis Anchusa Andersonia Andira Androlepis Andromeda Andropogon Androsace Anemone (windflower) Anemonella Anemonopsis Anemopaegma Anethum (dill) Angelica Angelonia Angiopteris Angophora Angraecum (an orchid genus) Anguloa (an orchid genus) Angulocaste (a hybrid orchid genus) Anigozanthos Anisacanthus Anisodontea Annona Anoda Anomatheca (See Freesia) Anopterus Anredera Antennaria Anthemis Anthericum Anthocleista Anthotroche Anthriscus Anthurium Anthyllis Antidesma Antigonon Antirrhinum (snapdragon) Apera Aphelandra Aphyllanthes Apium Apocynum Aponogeton Apophyllum Apodytes Aponogeton Aporocactus Aporoheliocereus (hybrid genus) Aprevalia Aptenia, synonym of Mesembryanthemum Aquilegia (columbine) Arabis (rock cress) Arachis Arachniodes Arachnis (scorpion orchid) (orchid genus) Araeococcus Araiostegia Aralia Araucaria (monkey-puzzle) Araujia Arbutus (madrone) Archidendron Archontophoenix (king palm) Arctium Arctostaphylos (bearberry, manzanita) Arctotheca Arctotis (African daisy) Ardisia Areca Arenaria (sandwort) Arenga Argemone (prickly poppy) Argyranthemum Argyreia Argyroderma Ariocarpus Arisaema Arisarum Aristea Aristolochia Aristotelia Armeria Armoracia Arnebia Arnica Aronia (chokeberry) Arrabidaea, see Bignonia magnifica Arrhenatherum (oat grass) Artanema Artabotrys Artemisia (mugwort, sagebrush, wormwood) Arthrocereus Arthropodium Artocarpus Arum Aruncus Arundina Arundinaria Arundo Asarina Asarum (wild ginger) Asclepias (milkweed, silkweed) × Ascocenda (hybrid genus) (an orchid genus) Ascocentrum an orchid genus Asimina Asparagus Asperula (woodruff) Asphodeline Asphodelus (asphodel) Aspidistra Asplenium Astelia Aster Asteranthera Astilbe Astilboides Astragalus (milk vetch) Astrantia Astrophytum Asystasia Atalaya Athamanta Atherosperma Athrotaxis Athyrium Atriplex Attalea Aubrieta Aucuba Aulax Auranticarpa Aurinia Austrocedrus Austrocylindropuntia Austrostipa Averrhoa Avicennia Azadirachta Azalea Azara Azolla (aquatic ferns) Azorella Azorina Aztekium
B
Babiana Baccharis Backhousia Bacopa (water hyssop) Bactris Baeckea Baikiaea Baileya Ballota Balsamorhiza (balsam root) Bambusa (bamboo) Banksia Baptisia an orchid genus Barbarea (yellow rocket or winter cress) Barkeria (an orchid genus) Barleria Barklya (gold blossom tree) Barnadesia Barringtonia Bartlettina Basselinia Bassia Bauera Bauhinia Baumea × Beallara an orchid hybrid genus Beaucarnea Beaufortia Beaumontia Beccariella Bedfordia Begonia Belamcanda Bellevalia Bellis (daisy) Bellium Berberidopsis Berberis (barberry) Berchemia Bergenia Bergerocactus Berkheya Berlandiera Berrya Bertolonia Berzelia Beschorneria Bessera Beta (beet) Betula (birch) Biarum Bidens Bignonia Bikkia Billardiera Billbergia Bischofia Bismarckia Bixa Blandfordia Blechnum (hard fern) Bletilla (an orchid genus) Blighia Bloomeria Blossfeldia Bocconia Boenninghausenia Bolax Bolbitis Bollea (an orchid genus) Boltonia Bolusanthus Bomarea Bombax Bongardia Boophone Borago Borassodendron Borassus Boronia Bosea Bossiaea Bothriochloa Bougainvillea Bouteloua Bouvardia Bowenia Bowiea Bowkeria Boykinia Brabejum Brachychiton Brachyglottis Brachylaena Brachypodium Brachyscome Brachysema Brachystelma Bracteantha Brahea (hesper palm) Brassavola (an orchid genus) Brassaia (octopus tree) Brassia (an orchid genus) Brassica (mustard, cabbage) × Brassidium (hybrid orchids) × Brassocattleya (hybrid orchids) × Brassolaeliocattleya (trigeneric hybrid orchids) Breynia Brillantaisia Brimeura Briza (quaking grass) Brodiaea Bromelia Broughtonia an orchid genus Broussonetia Browallia Brownea Browningia Bruckenthalia Brugmansia Brunfelsia Brunia Brunnera Brunsvigia Brya Buchloe Buckinghamia Buddleja Buglossoides Bulbine Bulbinella Bulbocodium Bulbophyllum (an orchid genus) Bulnesia Bunchosia Buphthalmum Bupleurum Burchardia Burchellia × Burrageara an orchid hybrid genus Burretiokentia Bursaria Bursera Burtonia Butea Butia Butomus Buxus (boxwood) Byrsonima Bystropogon
C
Cabomba Cadia Caesalpinia (dwarf poinciana, Pride of Barbados) Caladium Calamagrostis (reed grass, smallweed) Calamintha (calamint) Calamus Calandrinia Calanthe an orchid genus Calathea Calceolaria (slipperwort) Calendula (pot marigold) Calibanus Calibrachoa Calla Calliandra Callianthemum Callicarpa (beauty berry) Callicoma (black wattle) Callirhoe (poppy mallow) Callisia Callistemon (bottlebrush) Callistephus (Chinese aster) Callitriche (water starwort) Callitris (cypress pine) Calluna (heather) Calocedrus (incense cedar) Calochone Calochortus Calodendrum (cape chestnut) Calomeria Calophaca Calophyllum Calopyxis Caloscordum Calothamnus Calotropis Calpurnia Caltha (kingcup, marsh marigold) Calycanthus Calymmanthium Calypso (an orchid genus) Calytrix (starflower) Camassia (quamash) Camellia Camoensia Campanula (bellflower) Campsis (trumpet vine) Campylotropis (See Lespedeza) Cananga (ylang ylang) Canarina Canistrum Canna Cantua Capparis Capsicum (pepper) Caragana (peashrub) Caralluma Cardamine (bittercress) Cardiocrinum Cardiospermum Cardwellia Carex (sedge) Carissa Carlina Carludovica Carmichaelia Carnegiea (saguaro) Carpentaria Carphalea Carpinus (hornbeam) Carpobrotus Carthamus (safflower) Carum (caraway) Carya (hickory, pecan) Caryopteris Caryota (fishtail palm) Cassia (shower tree) Cassinia Cassiope Cassipourea Castanea (chestnut) Castanopsis Castanospermum (black bean) Casuarina (sheoak) Catalpa (Indian bean) Catananche Catasetum (an orchid genus) Catha (khat tree) Catharanthus (Madagascar periwinkle) Catopsis Cattleya (an orchid genus) Caulophyllum Cautleya Cavendishia Ceanothus (California-lilac) Cedrela (toon) Cedronella Cedrus (cedar) Ceiba (kapok) Celastrus (staff-vine) Celmisia (New Zealand daisy, New Zealand aster) Celosia (cockscomb) Celtis (hackberry) Centaurea Centaurium Centradenia Centranthus (valerian) Cephalaria Cephalocereus Cephalophyllum Cephalotaxus (plum-yew) Ceraria Cerastium Ceratonia (St. John's bread, carob bean) Ceratopetalum (coachwood) Ceratophyllum Ceratopteris Ceratostigma Ceratozamia Cerbera (sea mango) Cercidiphyllum Cercis (Judas tree, redbud) Cercocarpus Cereus Ceropegia Cestrum Chadsia Chaenomeles (flowering quince) Chaenorhinum (dwarf snapdragon) Chaerophyllum Chamaecyparis (false cypress) Chamaecytisus Chamaedaphne Chamaedorea Chamaelirium Chamaemelum (chamomile) Chamaerops Chamelaucium (wax flower) Chasmanthe Chasmanthium Cheilanthes Cheiridopsis Chelidonium Chelone (turtlehead) Chiastophyllum Chiliotrichum Chilopsis (desert willow) Chimaphila Chimonanthus (wintersweet) Chimonobambusa Chionanthus (fringe tree) Chionochloa Chirita Chlidanthus Choisya Chonemorpha (Frangipani vine) Choricarpia (brush turpentine) Chorisia (floss silk tree) Chorizema Chrysalidocarpus Chrysanthemoides Chrysanthemum Chrysobalanus Chrysogonum Chrysolepis Chrysophyllum (star apple) Chrysothemis Chusquea Cibotium Cicerbita Cichorium (chicory, endive) Cimicifuga (bugbane) Cinnamomum (camphor laurel) Cionura Cirsium Cissus Cistus (rock rose, sun rose) Citharexylum (fiddlewood) Citrofortunella (hybrid) Citrus (lime, lemon) Cladanthus Cladrastis Clarkia Claytonia Cleistocactus Clematis Cleome (spider flower) Clerodendrum Clethra (summersweet) Cleyera Clianthus Clintonia Clitoria Clivia Clusia Clytostoma Cobaea Coccoloba (sea grape) Coccothrinax (thatch palm) Cocculus Cochlioda an orchid genus – synonym of Oncidium Cochlospermum (buttercup tree, Maximiliana) Cocos (coconut) Codiaeum (croton) Codonanthe Codonopsis Coelia Coelogyne (an orchid genus) Coffea (coffee tree) Coix Colchicum (autumn crocus, meadow saffron) Coleonema Colletia Collinsia Collomia Colocasia (taro) Colquhounia Columnea Colutea (bladder senna) Coluteocarpus Colvillea Combretum Comesperma Commelina (day flower, spiderwort, widow's tears) Commersonia Commidendrum Commiphora Comptonella Comptonia (Sweetfern) Conandron Congea Conicosia Coniogramme Conoclinium (mistflower) Conophytum Conospermum Conostylis Conradina Consolida (larkspur) Convallaria (lily-of-the-valley) Convolvulus (bindweed, morning glory) Copernicia (caranda palm, wax palm) Copiapoa syn. Pilocopiapoa Coprosma Coptis (goldthread) Cordia (bird lime tree) Cordyline Coreopsis (tickseed) Coriandrum (coriander cilantro) Coriaria Cornus (dogwood, cornel) Corokia Coronilla Correa Corryocactus Cortaderia (pampas grass, tussock grass) Cortusa Corybas (helmet orchid) Corydalis Corylopsis (winter-hazel) Corylus (hazel, filbert) Corymbia Corynocarpus Corypha Coryphantha Cosmos Costus Cotinus (smoke bush) Cotoneaster Cotula (brass buttons) Cotyledon Couroupita (cannonball tree) Crambe Craspedia Crassula + Crataegomespilus (graft chimera) Crataegus (hawthorn) × Crataemespilus (hybrid) Crepis Crescentia (calabash) Crinodendron Crinum Crocosmia (falling stars, montbretia) Crocus Crossandra (firecracker flower) Crotalaria (rattlepod) Croton Crowea Cryptanthus (earth stars) Cryptbergia (hybrid) Cryptocarya Cryptocoryne (water trumpet) Cryptomeria (sugi, Japanese cedar) Cryptostegia (Indian rubber vine) Cryptotaenia Ctenanthe Cucumis Cucurbita Cuminum Cunila Cunninghamia (China-fir) Cunonia Cupaniopsis (tuckeroo) Cuphea Cupressus (cypress) Cuprocyparis (hybrid) Curcuma Cussonia Cyananthus (trailing bellflower) Cyanotis Cyathea (tree fern) Cyathodes Cybistax Cycas (cycad, sago palm) Cyclamen Cycnoches an orchid genus Cydista, synonym of Bignonia Cydonia (quince) Cylindropuntia Cymbalaria (ivy-leaved toadflax) Cymbidium (an orchid genus)