| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| CYSK | Cyrtandra skottsbergii St. John & Storey | Cyrtandra crassifolia | Gesneriaceae
|
| CYSP4 | Cyrtandra spathulata St. John | spoonleaf cyrtandra | Gesneriaceae
|
| CYST4 | Cyrtandra stupantha St. John & Storey | Cyrtandra laxiflora | Gesneriaceae
|
| CYSU3 | Cyrtandra subcordata St. John | Cyrtandra crassifolia | Gesneriaceae
|
| CYSU5 | Cyrtandra suberecta St. John | Cyrtandra hawaiensis | Gesneriaceae
|
| CYSU4 | Cyrtandra �subintegra St. John (pro sp.) | | Gesneriaceae
|
| CYSUI | Cyrtandra subumbellata (Hbd.) St. John & Storey var. intonsa St. John | Cyrtandra subumbellata | Gesneriaceae
|
| CYSU6 | Cyrtandra subumbellata (Hbd.) St. John & Storey | parasol cyrtandra | Gesneriaceae
|
| CYTE6 | Cyrtandra ternata St. John | Cyrtandra atomigyna | Gesneriaceae
|
| CYTI | Cyrtandra tintinnabula Rock | Laupahoehoe cyrtandra | Gesneriaceae
|
| CYTR4 | Cyrtandra triflora Gaud. | Cyrtandra garnotiana | Gesneriaceae
|
| CYTR5 | Cyrtandra tristis Hbd. | Cyrtandra kalihii | Gesneriaceae
|
| CYTU | Cyrtandra �turbiniformis St. John & Storey (pro sp.) | | Gesneriaceae
|
| CYUM2 | Cyrtandra �umbraculiflora Rock (pro sp.) | | Gesneriaceae
|
| CYVA | Cyrtandra vanioti Levl. | Cyrtandra garnotiana | Gesneriaceae
|
| CYVIP | Cyrtandra villicalyx St. John & Storey var. pubentigyna St. John & Storey | Cyrtandra villicalyx | Gesneriaceae
|
| CYVI4 | Cyrtandra �villicalyx St. John & Storey (pro sp.) | | Gesneriaceae
|
| CYVI5 | Cyrtandra villosa St. John & Storey | Cyrtandra rivularis | Gesneriaceae
|
| CYVI6 | Cyrtandra villosiflora St. John | Cyrtandra crassifolia | Gesneriaceae
|
| CYVI7 | Cyrtandra viridiflora St. John & Storey | greenleaf cyrtandra | Gesneriaceae
|
| CYWA | Cyrtandra waianaeensis St. John & Storey | Waianaeuka cyrtandra | Gesneriaceae
|
| CYWA2 | Cyrtandra waianuensis Rock | Cyrtandra hawaiensis | Gesneriaceae
|
| CYWA10 | Cyrtandra �waihoiensis St. John | sharp-tooth cyrtandra | Gesneriaceae
|
| CYWA3 | Cyrtandra wainihaensis Levl. | Cyrtandra kauaiensis | Gesneriaceae
|
| CYWAC | Cyrtandra waiolani Wawra var. capitata Hbd. | Cyrtandra waiolani | Gesneriaceae
|
| CYWA4 | Cyrtandra waiolani Wawra | fuzzyflower cyrtandra | Gesneriaceae
|
| CYWA5 | Cyrtandra waiomaoensis St. John | Cyrtandra hawaiensis | Gesneriaceae
|
| CYWA6 | Cyrtandra wawrae C.B. Clarke | rockface cyrtandra | Gesneriaceae
|
| CYWI2 | Cyrtandra wilderi St. John & Storey | Cyrtandra lessoniana | Gesneriaceae
|
| CYRTA | Cyrtandra J.R. & G. Forst. | cyrtandra | Gesneriaceae
|
| CYIN11 | Cyrto-hypnum involvens (Hedw.) Buck & Crum | cyrto-hypnum moss | Thuidiaceae
|
| CYMI6 | Cyrto-hypnum minutulum (Hedw.) Buck & Crum | cyrto-hypnum moss | Thuidiaceae
|
| CYPY2 | Cyrto-hypnum pygmaeum (Schimp. in B.S.G.) Buck & Crum | pygmy cyrto-hypnum moss | Thuidiaceae
|
| CYSC10 | Cyrto-hypnum schistocalyx (C. M�ll.) Buck & Crum | cyrto-hypnum moss | Thuidiaceae
|
| CYRTO5 | Cyrto-hypnum (Hampe) Hampe & Lor. in Hampe | cyrto-hypnum moss | Thuidiaceae
|
| CYPA22 | Cyrtococcum patens (L.) Camus | | Poaceae
|
| CYRTO7 | Cyrtococcum Stapf | | Poaceae
|
| CYAU | Cyrtomium auriculatum (Underwood) Morton | Phanerophlebia auriculata | Dryopteridaceae
|
| CYCA7 | Cyrtomium caryotideum (Wallich ex Hook. & Grev.) K. Presl | dwarf netvein hollyfern | Dryopteridaceae
|
| CYFA2 | Cyrtomium falcatum (L. f.) K. Presl | Japanese netvein hollyfern | Dryopteridaceae
|
| CYFO | Cyrtomium fortunei J. Sm. | Asian netvein hollyfern | Dryopteridaceae
|
| CYUM | Cyrtomium umbonatum (Underwood) Morton | Phanerophlebia umbonata | Dryopteridaceae
|
| CYRTO | Cyrtomium K. Presl | netvein hollyfern | Dryopteridaceae
|
| CYHY4 | Cyrtomnium hymenophylloides (H�b.) Nyh. ex T. Kop. | cyrtomnium moss | Mniaceae
|
| CYHY70 | Cyrtomnium hymenophyllum (Bruch & Schimp. in B.S.G.) Holm. | cyrtomnium moss | Mniaceae
|
| CYRTO3 | Cyrtomnium Holmen | cyrtomnium moss | Mniaceae
|
| CYGL9 | Cyrtopodium glutiniferum Raddi | | Orchidaceae
|
| CYPU4 | Cyrtopodium punctatum (L.) Lindl. | cowhorn orchid | Orchidaceae
|
| CYRTO2 | Cyrtopodium R. Br. ex Ait. f. | cyrtopodium | Orchidaceae
|
| CYCYA | Cyrtorhyncha cymbalaria (Pursh) Britt. ssp. alpina (Hook.) A.& D. L�ve | Ranunculus cymbalaria | Ranunculaceae
|
| CYRA6 | Cyrtorhyncha ranunculina Nutt. | Ranunculus ranunculinus | Ranunculaceae
|
| CYBI7 | Cyrtospadix bicolor (Ait.) Britt. & Wilson | Caladium bicolor | Araceae
|
| CYCH7 | Cyrtosperma chamissonis (Schott) Merr. | swamp taro | Araceae
|
| CYED | Cyrtosperma edule Schott | Cyrtosperma chamissonis | Araceae
|
| CYME10 | Cyrtosperma merkusii (Hassk.) Schott | gallan | Araceae
|
| CYRTO4 | Cyrtosperma Griffith | cyrtosperma | Araceae
|
| CYHY5 | Cystobasidium hypogymniicola Diederich & Ahti | | Platygloeaceae
|
| CYUS | Cystobasidium usneicola Diederich & Ahti | | Platygloeaceae
|
| CYSTO3 | Cystobasidium (Lagerh.) Neuhoff | cystobasidium | Platygloeaceae
|
| CYEB | Cystocoleus ebeneus (Dillwyn) Thwaites | velvet lichen | Uncertain Lichen Family
|
| CYSTO2 | Cystocoleus Thwaites | velvet lichen | Uncertain Lichen Family
|
| CYBU3 | Cystopteris bulbifera (L.) Bernh. | bulblet bladderfern | Dryopteridaceae
|
| CYDI10 | Cystopteris dickieana Sim | Cystopteris fragilis | Dryopteridaceae
|
| CYDO | Cystopteris douglasii Hook. | Douglas' bladderfern | Dryopteridaceae
|
| CYFRD | Cystopteris fragilis (L.) Bernh. ssp. dickieana (Sim) Hyl. | Cystopteris fragilis | Dryopteridaceae
|
| CYFRA | Cystopteris fragilis (L.) Bernh. var. angustata Lawson | Cystopteris fragilis | Dryopteridaceae
|
| CYFRH | Cystopteris fragilis (L.) Bernh. var. huteri (Hausman) Luerss. | Cystopteris laurentiana | Dryopteridaceae
|
| CYFRL2 | Cystopteris fragilis (L.) Bernh. var. laurentiana Weatherby | Cystopteris laurentiana | Dryopteridaceae
|
| CYFRM | Cystopteris fragilis (L.) Bernh. var. mackayi Lawson | Cystopteris tenuis | Dryopteridaceae
|
| CYFRP2 | Cystopteris fragilis (L.) Bernh. var. protrusa Weatherby | Cystopteris protrusa | Dryopteridaceae
|
| CYFRS | Cystopteris fragilis (L.) Bernh. var. simulans (Weatherby) McGregor | Cystopteris tennesseensis | Dryopteridaceae
|
| CYFRT2 | Cystopteris fragilis (L.) Bernh. var. tennesseensis (Shaver) McGregor | Cystopteris tennesseensis | Dryopteridaceae
|
| CYFRT | Cystopteris fragilis (L.) Bernh. var. tenuifolia (Clute) Broun | Cystopteris reevesiana | Dryopteridaceae
|
| CYFRW | Cystopteris fragilis (L.) Bernh. var. woodsioides Christ | Cystopteris fragilis | Dryopteridaceae
|
| CYFR2 | Cystopteris fragilis (L.) Bernh. | brittle bladderfern | Dryopteridaceae
|
| CYIL | Cystopteris �illinoensis R.C. Moran | | Dryopteridaceae
|
| CYLA4 | Cystopteris laurentiana (Weatherby) Blasdell | St. Lawrence bladderfern | Dryopteridaceae
|
| CYMO3 | Cystopteris montana (Lam.) Bernh. ex Desv. | mountain bladderfern | Dryopteridaceae
|
| CYPR4 | Cystopteris protrusa (Weatherby) Blasdell | lowland bladderfern | Dryopteridaceae
|
| CYRE15 | Cystopteris reevesiana Lellinger | Reeves' bladderfern | Dryopteridaceae
|
| CYTE3 | Cystopteris tennesseensis Shaver | Tennessee bladderfern | Dryopteridaceae
|
| CYTE7 | Cystopteris tenuis (Michx.) Desv. | upland brittle bladderfern | Dryopteridaceae
|
| CYUT2 | Cystopteris utahensis Windham & Haufler | Utah bladderfern | Dryopteridaceae
|
| CYWA8 | Cystopteris �wagneri R.C. Moran | | Dryopteridaceae
|
| CYSTO | Cystopteris Bernh. | bladderfern | Dryopteridaceae
|
| CYBU5 | Cytherea bulbosa (L.) House p.p. | Calypso bulbosa var. americana | Orchidaceae
|
| CYCA6 | Cytisus canariensis (L.) Kuntze | Genista canariensis | Fabaceae
|
| CYDA2 | Cytisus �dallimorei Rolfe | | Fabaceae
|
| CYLI2 | Cytisus linifolius (L.) Lam. | Genista linifolia | Fabaceae
|
| CYMA19 | Cytisus maderensis (Webb & Berth.) Masf. | Genista stenopetala | Fabaceae
|
| CYMO5 | Cytisus monspessulanus L. | Genista monspessulana | Fabaceae
|
| CYMU3 | Cytisus multiflorus (L'H�r.) Sweet | white spanishbroom | Fabaceae
|
| CYPA17 | Cytisus palmensis (Christ) Hutchinson | Chamaecystis palmensis | Fabaceae
|
| CYPR13 | Cytisus proliferus L. f. | Chamaecystis prolifera | Fabaceae
|
| CYRA2 | Cytisus �racemosus Nichols. | Genista canariensis | Fabaceae
|
| CYSCA | Cytisus scoparius (L.) Link var. andreanus (Puiss.) Dippel | scotchbroom | Fabaceae
|
| CYSCS2 | Cytisus scoparius (L.) Link var. scoparius | scotchbroom | Fabaceae
|
| CYSC4 | Cytisus scoparius (L.) Link | scotchbroom | Fabaceae
|
| CYST3 | Cytisus stenopetalus (Webb & Berth.) Christ | Genista stenopetala | Fabaceae
|
| CYST7 | Cytisus striatus (Hill) Rothm. | striated broom | Fabaceae
|
| CYTR10 | Cytisus triflorus L'H�r. | Cytisus villosus | Fabaceae
|