Taxonomic List	EGF	ICRA
Cabomba Aubl.	3:405	AMERICAN PUBLIC GARDENS ASSOCIATION
Cactaceae Juss. , tribe Hylocereeae F. Buxbaum	-	EPIPHYLLUM SOCIETY OF AMERICA (E.S.A.)
Cadellia F. Muell.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Caelebogyne J. Sm.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Caesalpinia L.	4:472	AMERICAN PUBLIC GARDENS ASSOCIATION
Caesia R. Br.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Caladium Vent.	2:99	INTERNATIONAL AROID SOCIETY (I.A.S.)
Calcareoboea H. W. Li	-	THE GESNERIAD SOCIETY, INC.
Caldcluvia D. Don	4:319	AMERICAN PUBLIC GARDENS ASSOCIATION
Calectasia R. Br.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Calectasiaceae Endl.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Calicotome Link	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Caliphruria Herb.	1:323	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Calla L.	2:89	INTERNATIONAL AROID SOCIETY (I.A.S.)
Calliandra Benth.	4:469	AMERICAN PUBLIC GARDENS ASSOCIATION
Callicarpa L.	6:158	AMERICAN PUBLIC GARDENS ASSOCIATION
Callisia Loefl.	-	TRADESCANTIA HUB
Callicoma Andrews	4:320	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Callicore Link = Amaryllis L.	-	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Calligonum L.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Calliprora Lindl. = Triteleia Douglas ex Lindl.	-	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Callistemon R. Br.	5:318	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Callitris Vent.	-	ROYAL HORTICULTURAL SOCIETY (RHS) - CONIFERS
Callopsis Engl.	2:104	INTERNATIONAL AROID SOCIETY (I.A.S.)
Calluna Salisb.	5:485	No ICRA at present
Calocedrus Kurz	1:81	ROYAL HORTICULTURAL SOCIETY (RHS) - CONIFERS
Calocephalus R. Br.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Calochortus Pursh	1:171	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Calodendrum Thunb.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Calomeria Vent.	6:559	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Caloncoba Gilg	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Calophaca DC.	4:506	AMERICAN PUBLIC GARDENS ASSOCIATION
Calophyllum L.	4:74	AMERICAN PUBLIC GARDENS ASSOCIATION
Calorophus Labill.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Caloscordum Herb.	1:246	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Calostemma R. Br.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Calothamnus Labill.	5:321	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Calotis R. Br.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Calycanthus L.	3:320	AMERICAN PUBLIC GARDENS ASSOCIATION
Calycocarpum Nutt. ex Spach	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Calycomis D. Don	4:319	AMERICAN PUBLIC GARDENS ASSOCIATION
Calycopeplus Planch.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Calyptochloa C. E. Hubb.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Calythropsis C. A. Gardner	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Calytrix Labill.	5:314	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Camassia Lindl.	1:215	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Camellia L.	4:35	INTERNATIONAL CAMELLIA SOCIETY
Campomanesia Ruiz & Pav.	5:305	AMERICAN PUBLIC GARDENS ASSOCIATION
Campsidium Seem.	6:351	AMERICAN PUBLIC GARDENS ASSOCIATION
Campsis Lour.	6:351	AMERICAN PUBLIC GARDENS ASSOCIATION
Camptorrhiza Hutch.	-	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Camptotheca Decne.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Campylotropis Bunge	4:493	AMERICAN PUBLIC GARDENS ASSOCIATION
Campynema Labill.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Cananga (DC.) Hook. f. & Thomson	3:316	AMERICAN PUBLIC GARDENS ASSOCIATION
Canarium L.	5:117	AMERICAN PUBLIC GARDENS ASSOCIATION
Canegelia D. Butcher (Canistrum E. Morren × Neoregelia L. B. Sm.)	-	BROMELIAD SOCIETY INTERNATIONAL (B.S.I)
Canella P. Browne	3:317	AMERICAN PUBLIC GARDENS ASSOCIATION
Canistropsis (Mez) Leme	-	BROMELIAD SOCIETY INTERNATIONAL (B.S.I)
Canistrum E. Morren	2:20	BROMELIAD SOCIETY INTERNATIONAL (B.S.I)
Canmea R. Foster & M. B. Foster (Aechmea Ruiz & Pav. × Canistrum E. Morren)	-	BROMELIAD SOCIETY INTERNATIONAL (B.S.I)
Canna L.	2:129	Currently no ICRA is available for this entry
Cannaceae Juss.	-	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Cantua J. Juss. ex Lam.	6:101	AMERICAN PUBLIC GARDENS ASSOCIATION
×Canularium D. A. Beadle (nom. illegit.) = Nidulistrum A.D. Hawkes	-	BROMELIAD SOCIETY INTERNATIONAL (B.S.I)
Capanea Decne.	-	THE GESNERIAD SOCIETY, INC.
Capparis L.	4:128	AMERICAN PUBLIC GARDENS ASSOCIATION
Caragana Fabr.	4:503	AMERICAN PUBLIC GARDENS ASSOCIATION
Carapa Aubl.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Cardiandra Siebold & Zucc.	4:312	AMERICAN PUBLIC GARDENS ASSOCIATION
Cardiospermum L.	5:155	AMERICAN PUBLIC GARDENS ASSOCIATION
Cardwellia F. Muell.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Carica L.	5:273	AMERICAN PUBLIC GARDENS ASSOCIATION
Carinavalva Ising	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Cariniana Casar.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Carlephyton Jum.	-	INTERNATIONAL AROID SOCIETY (I.A.S.)
Carmichaelia R. Br.	4:511	AMERICAN PUBLIC GARDENS ASSOCIATION
Carmispartium G. Hutchins ex M. D. Griff. (Carmichaelia R. Br. × Notospartium Hook. f.)	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Carnarvonia F. Muell.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Carpentaria Becc.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Carpenteria Torr.	4:313	AMERICAN PUBLIC GARDENS ASSOCIATION
Carpinus L.	3:55	AMERICAN PUBLIC GARDENS ASSOCIATION
Carpodetus J. R. Forst. & G. Forst.	4:315	AMERICAN PUBLIC GARDENS ASSOCIATION
Carrierea Franch.	5:249	AMERICAN PUBLIC GARDENS ASSOCIATION
Cartonema R.Br.	-	TRADESCANTIA HUB
Carya Nutt.	3:18	AMERICAN PUBLIC GARDENS ASSOCIATION
Caryophyllus L. = Syzygium Gaertn.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Caryopteris Bunge	6:156	AMERICAN PUBLIC GARDENS ASSOCIATION
Casearia Jacq.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Casimiroa La Llave	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Cassandra D. Don = Chamaedaphne Moench	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Cassia L.	4:474	AMERICAN PUBLIC GARDENS ASSOCIATION
Cassinia R. Br.	6:556	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Cassiope D. Don	5:488	AMERICAN PUBLIC GARDENS ASSOCIATION
Cassytha L.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Castanea Mill.	3:63	CONNECTICUT AGRICULTURAL EXPERIMENT STATION (CAES)
Castanopsis (D. Don) Spach	3:64	AMERICAN PUBLIC GARDENS ASSOCIATION
Castanospermum A. Cunn. ex Hook.	4:483	AMERICAN PUBLIC GARDENS ASSOCIATION
Castanospora F. Muell.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Castilla Cerv.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Casuarina L.	3:14	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Catalpa Scop.	6:345	AMERICAN PUBLIC GARDENS ASSOCIATION
Catha Forssk. ex Scop.	5:179	AMERICAN PUBLIC GARDENS ASSOCIATION
Cathaya Chun & Kuang	-	ROYAL HORTICULTURAL SOCIETY (RHS) - CONIFERS
Cathayanthe Chun	-	THE GESNERIAD SOCIETY, INC.
Catopsis Griseb.	-	BROMELIAD SOCIETY INTERNATIONAL (B.S.I)
Catospermum Benth.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Caustis R. Br.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Cavendishia Lindl.	5:505	AMERICAN PUBLIC GARDENS ASSOCIATION
Cayratia Juss.	5:196	AMERICAN PUBLIC GARDENS ASSOCIATION
Ceanothus L.	5:185	AMERICAN PUBLIC GARDENS ASSOCIATION
Cecropia Loefl.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Cedrela P. Browne	5:119	AMERICAN PUBLIC GARDENS ASSOCIATION
Cedrelinga Ducke	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Cedrus Trew	1:100	ROYAL HORTICULTURAL SOCIETY (RHS) - CONIFERS
Ceiba Mill.	5:230	AMERICAN PUBLIC GARDENS ASSOCIATION
Celastrus L.	5:178	AMERICAN PUBLIC GARDENS ASSOCIATION
Celtis L.	3:79	AMERICAN PUBLIC GARDENS ASSOCIATION
Cenarrhenes Labill.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Centipeda Lour.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Centrolepis Labill.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Cephalanthus L.	6:86	AMERICAN PUBLIC GARDENS ASSOCIATION
Cephalaralia Schrad.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Cephalipterum A. Gray	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Cephalostachyum Munro	-	INTERNATIONAL CULTIVAR REGISTRATION CENTER FOR BAMBOOS (POACEAE, TRIBE BAMBUSEAE)
Cephalotaceae Dumort.	-	INTERNATIONAL CARNIVOROUS PLANT SOCIETY (I.C.P.S.)
Cephalotaxaceae Neger	-	ROYAL HORTICULTURAL SOCIETY (RHS) - CONIFERS
Cephalotaxus Siebold & Zucc. ex Endl.	1:73	ROYAL HORTICULTURAL SOCIETY (RHS) - CONIFERS
Cephalotus Labill.	4:244	INTERNATIONAL CARNIVOROUS PLANT SOCIETY (I.C.P.S.)
Ceratonia L.	4:474	AMERICAN PUBLIC GARDENS ASSOCIATION
Ceratopetalum Sm.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Ceratostigma Bunge	5:560	AMERICAN PUBLIC GARDENS ASSOCIATION
Cercestis Schott	-	INTERNATIONAL AROID SOCIETY (I.A.S.)
Cercidiphyllum Siebold & Zucc.	3:325	AMERICAN PUBLIC GARDENS ASSOCIATION
Cercidium Tul. = Parkinsonia L.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Cercis L.	4:476	UNITED STATES NATIONAL ARBORETUM
Cercocarpus Kunth	4:386	AMERICAN PUBLIC GARDENS ASSOCIATION
Cestrum L.	6:254	AMERICAN PUBLIC GARDENS ASSOCIATION
Chaenomeles Lindl.	4:404	AMERICAN PUBLIC GARDENS ASSOCIATION
Chaetanthus R. Br.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Chamaebatia Benth.	4:387	AMERICAN PUBLIC GARDENS ASSOCIATION
Chamaebatiaria (Porter ex W. H. Brewer & S. Watson) Maxim.	4:329	AMERICAN PUBLIC GARDENS ASSOCIATION
Chamaecladon Miq. = Homalomena Schott	-	INTERNATIONAL AROID SOCIETY (I.A.S.)
Chamaecrista Moench	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Chamaecyparis Spach	1:83	ROYAL HORTICULTURAL SOCIETY (RHS) - CONIFERS
Chamaecytisus Link	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Chamaedaphne Moench	5:491	AMERICAN PUBLIC GARDENS ASSOCIATION
Chamaelaucium Desf.	5:315	AMERICAN PUBLIC GARDENS ASSOCIATION
Chamaepericlymenum Hill = Cornus L.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Chamaescilla F. Muell. ex Benth.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Chamaespartium Adans. = Genista L.	4:545	AMERICAN PUBLIC GARDENS ASSOCIATION
Chamaexeros Benth.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Chamelaucium Desf.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Championia Gardner	-	THE GESNERIAD SOCIETY, INC.
Chasmanthe N. E. Br.	1:391	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Cheiranthera Brongn.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Chevaliera Gaudich. ex Beer	-	BROMELIAD SOCIETY INTERNATIONAL (B.S.I)
Chiapasia Britton & Rose = Disocactus Lindl.	-	EPIPHYLLUM SOCIETY OF AMERICA (E.S.A.)
Chiliotrichum Cass.	6:588	AMERICAN PUBLIC GARDENS ASSOCIATION
Chilopsis D. Don	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Chimaphila Pursh	5:416	AMERICAN PUBLIC GARDENS ASSOCIATION
Chimonanthus Lindl.	3:320	MEI FLOWER AND WINTERSWEET BRANCH OF CHINA FLOWER ASSOCIATION - CHIMONANTHUS
Chimonobambusa Makino	-	INTERNATIONAL CULTIVAR REGISTRATION CENTER FOR BAMBOOS (POACEAE, TRIBE BAMBUSEAE)
Chimonocalamus Hsueh & Yi	-	INTERNATIONAL CULTIVAR REGISTRATION CENTER FOR BAMBOOS (POACEAE, TRIBE BAMBUSEAE)
Chiogenes Salisb. ex Torr. = Gaultheria L.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Chionanthus L.	5:577	AMERICAN PUBLIC GARDENS ASSOCIATION
Chionohebe B.G. Briggs & Ehrend. = Veronica L. sect. Hebe (Comm. ex Juss) Benth.	-	ROYAL NEW ZEALAND INSTITUTE OF HORTICULTURE, INC.
Chionodoxa Boiss.	1:214	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Chionoscilla J. Allen ex G. Nicholson (Chionodoxa Boiss. × Scilla L.)	-	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Chiranthodendron Larreat.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Chirita Buch.-Ham. ex D. Don	6:397	THE GESNERIAD SOCIETY, INC.
Chiritopsis W. T. Wang	-	THE GESNERIAD SOCIETY, INC.
Chitalpa T. S. Elias & Wisura (Catalpa Scop. × Chilopsis D. Don)	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Chlaenosciadum C. Norman	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Chlidanthus Herb.	1:320	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Chloanthes R. Br.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Chloothamnus Buse	-	INTERNATIONAL CULTIVAR REGISTRATION CENTER FOR BAMBOOS (POACEAE, TRIBE BAMBUSEAE)
Chloranthus Sw.	3:416	AMERICAN PUBLIC GARDENS ASSOCIATION
Chlorocardium Rohwer et al.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Chlorogalum Kunth	1:133	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Chlorospatha Engl.	-	INTERNATIONAL AROID SOCIETY (I.A.S.)
Chloroxylon DC.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Choisya Kunth	5:109	AMERICAN PUBLIC GARDENS ASSOCIATION
Chondodendron Ruiz & Pav.	3:398	AMERICAN PUBLIC GARDENS ASSOCIATION
Chordospartium Cheeseman	4:510	AMERICAN PUBLIC GARDENS ASSOCIATION
Choretis Herb. = Hymenocallis Salisb.	-	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Choretrum R. Br.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Choricarpia Domin	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Choriceras Baill.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Chorilaena Endl.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Chorisia Kunth	5:230	AMERICAN PUBLIC GARDENS ASSOCIATION
Choristemon H. B. Will.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Chorizandra R. Br.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Chorizema Labill.	4:527	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Chosenia Nakai = Salix L.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Chrysobalanus L.	4:462	AMERICAN PUBLIC GARDENS ASSOCIATION
Chrysocephalum Walp.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Chrysolepis Hjelmq.	3:65	AMERICAN PUBLIC GARDENS ASSOCIATION
Chrysophyllum L.	5:567	AMERICAN PUBLIC GARDENS ASSOCIATION
Chrysothamnus Nutt.	6:564	AMERICAN PUBLIC GARDENS ASSOCIATION
Chrysothemis Decne.	6:383	THE GESNERIAD SOCIETY, INC.
Chthonocephalus Steetz	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Chukrasia A. Juss.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Chuniodendron Hu = Aphanamixis Blume	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Chusquea Kunth	-	INTERNATIONAL CULTIVAR REGISTRATION CENTER FOR BAMBOOS (POACEAE, TRIBE BAMBUSEAE)
Cinchona L.	6:85	AMERICAN PUBLIC GARDENS ASSOCIATION
Cineraria L.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Cinnamomum Schaeff.	3:322	AMERICAN PUBLIC GARDENS ASSOCIATION
Cissus L.	5:194	AMERICAN PUBLIC GARDENS ASSOCIATION
Cistus L.	5:263	AMERICAN PUBLIC GARDENS ASSOCIATION
Citharexylum L.	6:157	AMERICAN PUBLIC GARDENS ASSOCIATION
Citriobatus A. Cunn. & Putt.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Citrofortunella J. W. Ingram & H. E. Moore	5:113	AMERICAN PUBLIC GARDENS ASSOCIATION
Citroncirus J. W. Ingram & H. E. Moore	5:113	AMERICAN PUBLIC GARDENS ASSOCIATION
Citronella D. Don	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Citropsis (Engl.) Swingle & M. Kellerm.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Citrus L.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Cladothamnus Bong. = Elliottia Mühl. ex Elliott	5:477	AMERICAN PUBLIC GARDENS ASSOCIATION
Cladrastis Raf.	4:484	AMERICAN PUBLIC GARDENS ASSOCIATION
Clappertonia Meisn.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Clausena Burm. f.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Clavija Ruiz & Pav.	5:508	AMERICAN PUBLIC GARDENS ASSOCIATION
Cleistochloa C. E. Hubb.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Clematicissus Planch.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Clematis L.	3:357	ROYAL HORTICULTURAL SOCIETY (RHS) - CLEMATIS
Clematoclethra (Franch.) Maxim.	4:27	AMERICAN PUBLIC GARDENS ASSOCIATION
Clerodendrum L.	6:159	AMERICAN PUBLIC GARDENS ASSOCIATION
Clethra L.	5:415	AMERICAN PUBLIC GARDENS ASSOCIATION
Cleyera Thunb.	4:42	AMERICAN PUBLIC GARDENS ASSOCIATION
Clianthus Sol. ex Lindl.	4:501	AMERICAN PUBLIC GARDENS ASSOCIATION
Cliftonia Banks ex C. F. Gaertn.	5:164	AMERICAN PUBLIC GARDENS ASSOCIATION
Clitoria L.	4:499	AMERICAN PUBLIC GARDENS ASSOCIATION
Clivia Lindl.	1:316	CLIVIA SOCIETY
Clusia L.	4:75	AMERICAN PUBLIC GARDENS ASSOCIATION
Clymenia Swingle	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Clytostoma Miers	6:350	AMERICAN PUBLIC GARDENS ASSOCIATION
Cneorum L.	5:115	AMERICAN PUBLIC GARDENS ASSOCIATION
Cobaea Cav.	6:101	AMERICAN PUBLIC GARDENS ASSOCIATION
Cobananthus Wiehler	-	THE GESNERIAD SOCIETY, INC.
Coburgia Herb. = Amaryllis L.	-	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Coccoloba P. Browne	3:129	AMERICAN PUBLIC GARDENS ASSOCIATION
Cocculus DC.	3:399	AMERICAN PUBLIC GARDENS ASSOCIATION
Cochliostema Lem.	-	TRADESCANTIA HUB
Cochlospermum Kunth	5:270	AMERICAN PUBLIC GARDENS ASSOCIATION
×Cockeara Heath (Aporocactus Lem. (=Disocactus Lindl.) × Epiphyllum Haw. × Heliocereus (A. Berger) Britton & Rose (=Disocactus Lindl.) × Nopalxochia Britton & Rose (=Disocactus Lindl.) × Selenicereus (A. Berger) Britton & Rose) = Paulheathara Trehane	-	EPIPHYLLUM SOCIETY OF AMERICA (E.S.A.)
Codiaeum A. Juss.	5:78	AMERICAN PUBLIC GARDENS ASSOCIATION
Codonanthe (Mart.) Hanst.	6:387	THE GESNERIAD SOCIETY, INC.
Codonanthopsis Mansf.	-	THE GESNERIAD SOCIETY, INC.
Codonocarpus A. Cunn. ex Endl.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Cola Schott & Endl.	5:233	AMERICAN PUBLIC GARDENS ASSOCIATION
Colanthelia McClure & E. W. Sm.	-	INTERNATIONAL CULTIVAR REGISTRATION CENTER FOR BAMBOOS (POACEAE, TRIBE BAMBUSEAE)
Colchicaceae (Liliaceae) DC.	-	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Colchicum L.	1:162	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Coleanthera Stschegl.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Coleocarya S. T. Blake	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Coleocoma F. Muell.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Coleogyne Torr.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Coleonema Bartl. & H. L. Wendl.	5:104	AMERICAN PUBLIC GARDENS ASSOCIATION
Coleotrype C.B.Clarke	-	TRADESCANTIA HUB
Colletia Comm. ex Juss.	5:184	AMERICAN PUBLIC GARDENS ASSOCIATION
Colletogyne Buchet	-	INTERNATIONAL AROID SOCIETY (I.A.S.)
Colocasia Schott	2:100	INTERNATIONAL AROID SOCIETY (I.A.S.)
Colophospermum Kirk ex J. Léonard	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Colpogyne B. L. Burtt = Streptocarpus Lindl.	-	THE GESNERIAD SOCIETY, INC.
Colquhonia Wall.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Colquhounia Wall.	6:196	AMERICAN PUBLIC GARDENS ASSOCIATION
Colubrina Rich. ex Brongn.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Columnea L.	6:389	THE GESNERIAD SOCIETY, INC.
Colutea L.	4:502	AMERICAN PUBLIC GARDENS ASSOCIATION
Colvillea Bojer	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Combretum Loefl.	5:336	AMERICAN PUBLIC GARDENS ASSOCIATION
Comesperma Labill.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Commelina Plum. ex L.	-	TRADESCANTIA HUB
Commersonia J. R. Forst. & G. Forst.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Commiphora Jacq.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Comptonia L'Hér. ex Aiton	3:17	AMERICAN PUBLIC GARDENS ASSOCIATION
Conandron Siebold & Zucc.	6:398	THE GESNERIAD SOCIETY, INC.
Connellia N. E. Br.	-	BROMELIAD SOCIETY INTERNATIONAL (B.S.I)
Conocarpus L.	5:336	AMERICAN PUBLIC GARDENS ASSOCIATION
Conospermum Sm.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Conostephium Benth.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Conostylis R. Br.	1:291	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Conothamnus Lindl.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Conradina A. Gray	6:210	AMERICAN PUBLIC GARDENS ASSOCIATION
×Cooperanthes Lancaster (Cooperia Herb. (=Zephyranthes Herb.) × Zephyranthes Herb.) = Zephyranthes Herb.	-	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Cooperia Herb. = Zephyranthes Herb.	-	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Coopernookia Carolin	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Copaifera L.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Coprosma J. R. Forst. & G. Forst.	6:93	ROYAL NEW ZEALAND INSTITUTE OF HORTICULTURE, INC.
Corallodiscus Batalin	6:393	THE GESNERIAD SOCIETY, INC.
Corallospartium J. B. Armstr.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Corchorus L.	5:213	AMERICAN PUBLIC GARDENS ASSOCIATION
Cordeauxia Hemsl.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Cordyline Comm. ex R. Br.	1:289	AMERICAN PUBLIC GARDENS ASSOCIATION
Corema D. Don	5:506	AMERICAN PUBLIC GARDENS ASSOCIATION
Coriaria L.	5:125	AMERICAN PUBLIC GARDENS ASSOCIATION
Cornus L.	5:362	AMERICAN PUBLIC GARDENS ASSOCIATION
Corokia A. Cunn.	5:366	AMERICAN PUBLIC GARDENS ASSOCIATION
Coronanthera Vieill. ex C. B. Clarke	-	THE GESNERIAD SOCIETY, INC.
Correa Andrews	5:106	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Corydalis DC.	4:120	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Corylopsis Siebold & Zucc.	4:167	AMERICAN PUBLIC GARDENS ASSOCIATION
Corylus L.	3:57	AMERICAN PUBLIC GARDENS ASSOCIATION
Corymbia K. D. Hill & L. A. S. Johnson	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Corynabutilon (K. Schum.) Kearney	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Corynanthera J. W. Green	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Corynocarpus J. R. Forst. & G. Forst.	5:173	AMERICAN PUBLIC GARDENS ASSOCIATION
Corynotheca F. Muell. ex Benth.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Corytoplectus Oerst.	6:386	THE GESNERIAD SOCIETY, INC.
Cosmelia R. Br.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Costaceae Nakai	-	HELICONIA SOCIETY INTERNATIONAL
Cotinus Mill.	5:128	AMERICAN PUBLIC GARDENS ASSOCIATION
Cotoneaster Medik.	4:426	AMERICAN PUBLIC GARDENS ASSOCIATION
Cottendorfia Schult. f.	-	BROMELIAD SOCIETY INTERNATIONAL (B.S.I)
Cotylelobium Pierre	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Couepia Aubl.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Couroupita Aubl.	5:323	AMERICAN PUBLIC GARDENS ASSOCIATION
Cowania DC.	4:387	AMERICAN PUBLIC GARDENS ASSOCIATION
Craibiodendron W. W. Sm.	5:489	AMERICAN PUBLIC GARDENS ASSOCIATION
Craniolaria L.	-	INTERNATIONAL CARNIVOROUS PLANT SOCIETY (I.C.P.S.)
Craspedia G. Forst.	6:559	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Crataegomespilus Simon-Louis ex Bellair (Crataegus L. + Mespilus L.)	4:446	AMERICAN PUBLIC GARDENS ASSOCIATION
Crataegus L.	4:439	AMERICAN PUBLIC GARDENS ASSOCIATION
Crataemespilus Camus (Crataegus L. × Mespilus L.)	4:446	AMERICAN PUBLIC GARDENS ASSOCIATION
Crateva L.	4:129	AMERICAN PUBLIC GARDENS ASSOCIATION
Cratoxylum Blume	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Cratystylis S. Moore	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Cremosperma Benth.	-	THE GESNERIAD SOCIETY, INC.
Crescentia L.	6:346	AMERICAN PUBLIC GARDENS ASSOCIATION
Crinodendron Molina	5:203	AMERICAN PUBLIC GARDENS ASSOCIATION
Crinum L.	1:309	Currently no ICRA is available for this entry
Crocosmia Planch.	1:386	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Crocus L.	1:361	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Crossandra Salisb.	6:366	AMERICAN PUBLIC GARDENS ASSOCIATION
Crosslandia W. Fitzg.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Crowea Sm.	5:106	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Cryptananas D. A. Beadle (Ananas Mill. × Cryptanthus Otto & A. Dietr.)	-	BROMELIAD SOCIETY INTERNATIONAL (B.S.I)
Cryptandra Sm.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Cryptanthus Otto & A. Dietr.	2:18	BROMELIAD SOCIETY INTERNATIONAL (B.S.I)
Cryptbergia anon. (Billbergia Thunb. × Cryptanthus Otto & A. Dietr.)	-	BROMELIAD SOCIETY INTERNATIONAL (B.S.I)
Cryptmea E. L. Sm. (Aechmea Ruiz & Pav. × Cryptanthus Otto & A. Dietr.)	-	BROMELIAD SOCIETY INTERNATIONAL (B.S.I)
Cryptocarya R. Br.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Cryptocereus Alexander = Selenicereus (A. Berger) Britton & Rose	-	EPIPHYLLUM SOCIETY OF AMERICA (E.S.A.)
Cryptochloa Swallen	-	INTERNATIONAL CULTIVAR REGISTRATION CENTER FOR BAMBOOS (POACEAE, TRIBE BAMBUSEAE)
Cryptocoryne Fisch. ex Wydler	2:110	INTERNATIONAL AROID SOCIETY (I.A.S.)
Cryptomeria D. Don	1:79	ROYAL HORTICULTURAL SOCIETY (RHS) - CONIFERS
Cubitanthus Barringer	-	THE GESNERIAD SOCIETY, INC.
Cudrania Trecul = Maclura Nutt.	3:88	AMERICAN PUBLIC GARDENS ASSOCIATION
Culcasia P. Beauv.	-	INTERNATIONAL AROID SOCIETY (I.A.S.)
Cunninghamia R. Br.	1:78	ROYAL HORTICULTURAL SOCIETY (RHS) - CONIFERS
Cunonia L.	4:319	AMERICAN PUBLIC GARDENS ASSOCIATION
Cupaniopsis Radlk.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Cuphanotus O. E. Schulz	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Cupressaceae Gray	-	ROYAL HORTICULTURAL SOCIETY (RHS) - CONIFERS
Cupressocyparis Dallim. (Chamaecyparis Spach × CupressusL.)	1:84	ROYAL HORTICULTURAL SOCIETY (RHS) - CONIFERS
Cupressus L.	1:81	ROYAL HORTICULTURAL SOCIETY (RHS) - CONIFERS
Cupulanthus Hutch.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Curculigo Gaertn.	1:326	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Curcuma L.	-	Currently no ICRA is available for this entry
Curtonus N. E. Br. = Crocosmia Planch.	-	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Cussonia Thunb.	5:381	AMERICAN PUBLIC GARDENS ASSOCIATION
Cuttsia F. Muell.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Cyanostegia Turcz.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Cyanotis D.Don	-	TRADESCANTIA HUB
Cyathea Sm.	1:35	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Cyathochaeta Nees	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Cyathodes Labill.	5:507	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Cybistetes Milne-Redh. & Schweick.	-	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Cyclamen L. , excluding C. persicum Mill.	5:549	CYCLAMEN SOCIETY
Cyclamen persicum Mill.	-	no ICRA at present
Cydista Miers	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Cydonia Mill.	4:404	AMERICAN PUBLIC GARDENS ASSOCIATION
Cymbonotus Cass.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Cynometra L.	-	AMERICAN PUBLIC GARDENS ASSOCIATION
Cypella Herb.	1:358	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Cyphanthera Miers	6:267	AMERICAN PUBLIC GARDENS ASSOCIATION
Cyphomandra Sendt.	6:240	AMERICAN PUBLIC GARDENS ASSOCIATION
Cyphostemma (Planch.) Alston	5:196	AMERICAN PUBLIC GARDENS ASSOCIATION
Cypselocarpus F. Muell.	-	AUSTRALIAN CULTIVAR REGISTRATION AUTHORITY (ACRA)
Cyrilla Garden ex L.	5:164	AMERICAN PUBLIC GARDENS ASSOCIATION
Cyrtandra J. R. Forst. & G. Forst.	-	THE GESNERIAD SOCIETY, INC.
Cyrtanthus Aiton	1:300	ROYAL GENERAL BULBGROWERS' ASSOCIATION (K.A.V.B.)
Cyrtosperma Griff.	-	INTERNATIONAL AROID SOCIETY (I.A.S.)
Cytisus Desf.	4:538	AMERICAN PUBLIC GARDENS ASSOCIATION

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