| Ricerca | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V |
| Sigla | Specie | Status | Corologia | Note |
| Calgra | Calamintha grandiflora | |||
| Camglo | Campanula glomerata | |||
| Camrap | Campanula rapunculus | |||
| Camsch | Capanula scheuchzeri | |||
| Camtan | Campanula tanfanii | END | ||
| Camtra | Campanula trachelium | |||
| Capbur | Capsella bursa-pastoris | |||
| Caprub | Capsella rubella | |||
| Caraca | Carlina acaulis | |||
| Carbu | Cardamine bulbifera | |||
| Carcar | Carex caryophyllea | |||
| Cardcar | Carduus carlinaefolius | |||
| Cardig | Carex digitata | |||
| Carenn | Cardamine enneaphyllos | |||
| Carhel | Carum heldreichii | |||
| Carhum | Carex humilis | |||
| Carkit | Carex kitaibeliana | |||
| Carmac | Carex macrolepis | END | ||
| Carpil | Carex pilosa | RR | ||
| Carumb | Carex umbrosa | RR | ||
| Carutz | Carlina utzka | |||
| Cenamb | Centaurea ambigua ssp nigra | END | ||
| Cenbra | Centaurea bracteata | |||
| Cencan | Centaurea cana | |||
| Centri | Centaurea triumfetti ssp variegata | |||
| Cepdam | Cephalanthera damasonium | |||
| Cepleu | Cephalaria leucantha | |||
| Ceplon | Cephalanthera longifolia | |||
| Ceprub | Cephalanthera rubra | |||
| Cerarv | Cerastium arvense ssp arvense | |||
| Cerarvs | Cerastium arvense ssp suffrutticosum | |||
| Cerpum | Cerastium pumilium | |||
| Certom | Cerastium tomentosum | END | ||
| Cetoff | Ceterach officinarum | |||
| Chaspi | Chamaecytisus spinescens | END | ||
| Chebon | Chenopodium bonus-henricus | |||
| Chemaj | Chelidonium majus | |||
| Chrseg | Chrysanthemum segetum | |||
| Cirten | Cirsium tenoreanum | END | ||
| Clevit | Clematis vitalba | |||
| Coevir | Coeloglossum viride | |||
| Colalp | Colchium alpinum | |||
| Colnea | Colchicum neapolitanum | |||
| Conmaj | Convallaria majalis | |||
| Corave | Corylus avellana | |||
| Coreme | Coronilla emerus ssp emeroides | |||
| Corint | Corydalis intermedia | |||
| Cormas | Cornus mas | |||
| Cormin | Coronilla minima | |||
| Coroch | Corydalis ochroleuca | |||
| Corsan | Cornus sanguinea | |||
| Corsol | Corydalis solida | |||
| Cortri | Corallorhiza trifida | RR | ||
| Corvag | Coronilla vaginalis | |||
| Cotneb | Cotoneaster nebrodensis | |||
| Cramon | Crataegus monogyna ssp monogyna | |||
| Crebie | Crepis biennis | |||
| Croalb | Crocus albiflorus | |||
| Crulae | Cruciata laevipes | |||
| Cusepi | Cuscuta epithymum | |||
| Cuseur | Cuscuta europaea | |||
| Cyched | Cyclamen hederifolium | |||
| Cymmur | Cymbalaria muralis | |||
| Cympal | Cymbalaria pallida | END | ||
| Cynmag | Cynoglossum magellense | END | ||
| Cysfra | Cystopteris fragilis ssp fragilis | |||
| Cytses | Cytisus sessilifolius | |||
| Cytvil | Cytisus villosus | |||
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