Commiphora myrrha (Nees) Engl. // Commiphora molmol (Engl.) Engl. ex Tschirch Commiphora schimperi (O. Berg) Engl. Commiphora wightii (Arn.) Bhandari Common bilberry (as plant) // Vaccinium myrtillus L. Common chickweed (as plant) // Stellaria media (L.) Vill. Common hawthorn (as plant) // Crataegus monogyna Jacq. Common hazel (as plant) // Corylus avellana L. Common honeybush tea (as plant) // Cyclopia genistoides (L.) Vent. Common polypody (as plant) // Polypodium vulgare L. Common screw pine (as plant) // Pandanus utilis Bory Common speedwell (as plant) // Veronica officinalis L. Common thyme (as plant) // Thymus vulgaris L. Common vervain (as plant) // Verbena officinalis L. Common vetch (as plant) // Vicia sativa L. Common walnut (as plant) // Juglans regia L. Common wild oat (as plant) // Avena fatua L. Condurango (as plant) // Marsdenia cundurango Rchb.f. Conioselinum smithii (H.Wolff) Pimenov & Kljuykov // Conioselinum jeholense (Nakai & Kitag.) Pimen Conioselinum vaginatum (Spreng.) Thell. // Conioselinum univittatum Turcz. ex Kar. & Kir. Conium maculatum L. Consolida ajacis (L.) Schur // Consolida ambigua (L.) P.W.Ball & Heywood // Delphinium ajacis L. Consolida orientalis (J.Gay) Schrödinger // Consolida hispanica (Willk. ex Costa) Greuter & Burdet Convallaria majalis L. Convolvulus arvensis L. Convolvulus prostratus Forssk. Convolvulus scammonia L. Convolvulus scoparius L.f. Copaifera guyanensis Desf. Copaifera langsdorffii Desf. Copaifera martii Hayne Copaifera officinalis L. Coptis chinensis Franch. Coptis deltoidea C.Y.Cheng & P.K.Hsiao Coptis japonica (Thunb.) Makino Coptis teeta Wall. Coptis trifolia (L.) Salisb. // Helleborus trifolius L. Corchorus olitorius L. Cordia curassavica (Jacq.) Roem. & Schult. // Cordia verbenacea A.DC. Cordia martinicensis (Jacq.) Roem. & Schult. Cordia myxa L. Cordyline fruticosa (L.) A.Chev. Coreopsis lanceolata L. Coreopsis tinctoria Nutt. Coriaria myrtifolia L. Coriaria ruscifolia subsp. microphylla (Poir.) J.E.Skog // Coriaria thymifolia Humb. & Bonpl. ex Willd. Cornelian cherry (as plant) // Cornus mas L. Cornflower (as plant) // Centaurea cyanus L. // Cyanus segetum Hill. Cornulaca aucheri Moq. // Cornulaca leucantha Charif & Aellen Cornus florida L. Cornus officinalis Siebold & Zucc. Cornus sanguinea L. Cornutia pyramidata L. Coronilla scorpioides (L.) Koch. Corrigiola capensis Willd. // Corrigiola capensis subsp. capensis // Corrigiola telefiifolia sensu Harv. & Sond. Corydalis ambigua Cham.& Schltdl. Corydalis cava (L.) Schweigg. & Körte // Corydalis tuberosa DC. Corydalis intermedia (L.) Merat. Corydalis solida (L.) Clairv. // Corydalis bulbosa (L.) DC. Corydalis yanhusuo (Y.H.Chou & Chun C.Hsu) W.T.Wang ex Z.Y.Su & C.Y.Wu Corymbia citriodora (Hook.) K.D.Hill & L.A.S.Johnson Corynocarpus laevigatus J.R.Forst. & G.Forst. Coryphantha macromeris (Engelm.) Britton & Rose Coscinium fenestratum (Goetgh.) Colebr. Cosmos bipinnatus Cav. Cosmos sulphureus Cav. Cossinia pinnata Comm. ex Lam. Cota tinctoria (L.) J.Gay // Anthemis tinctoria L. Cotinus coggygria Scop. Cotoneaster adpressus Bois Cotoneaster apiculatus Rehder & E.H.Wilson Cotoneaster bacillaris Wall. ex Lindl. Cotoneaster discolor Pojark. Cotoneaster divaricatus Rehder & E.H.Wilson Cotoneaster horizontalis Decne. Cotoneaster lucidus Schltdl. Cotoneaster oliganthus Pojark. Cotoneaster pannosus Franch. Cotoneaster racemiflorus (Desf.) K.Koch Cotoneaster roseus Edgew. Cotoneaster simonsii hort. ex Baker Cotoneaster zabelii C.K.Schneid. Couch grass (as plant) // Agropyron repens (L.) P.Beauv. // Elymus repens (L.) Gould // Elytrigia repens (L.) Nevski // Triticum repens L. Cowberry infusion leaves // Vaccinium vitis-idaea L. Cowslip (as plant) // Primula veris L. Cranberry (as plant) // Vaccinium macrocarpon Aiton Crataegus nigra Waldst. & Kit. Crataegus pentagyna Waldst. & Kit. ex Willd. Crataegus pinnatifida Bunge Crataegus rhipidophylla Gand. Crateva nurvala Buch.-Ham. // Crateva lophosperma Kurz Crescentia cujete L. Crinum asiaticum L (as plant) // Crinum asiaticum L. Crotalaria retusa L. Crotalaria sessiliflora L. Crotalaria spectabilis Roth Croton eluteria (L.) W.Wright // Croton eluteria Benn. Croton flavens L. Croton lechleri Müll.Arg. Croton mauritianus Lam. Croton tiglium L.