| Common name (English) | |
|---|---|
| Borago officinalis | Boražina |
| Bougainvillea glabra | Bougainvillea |
| Bougainvillea spectabilis | Great bougainvillea, Brazil bougainvillea |
| Broussonetia papyrifera | Paper mulberry |
| Brugmansia sanguinea | Red floripontio, Red Angel's Trumpet |
| Brugmansia suaveolens | Angel's tears |
| Brugmansia × candida | Angel's-trumpet |
| Buddleja davidii | Butterfly Bush, Buddleia |
| Buddleja madagascariensis | Madagascar Buddleia |
| Buxus sempervirens | Caucasian boxwood, Common box, Boxwood, Box |
| Calendula officinalis | Scotch marigold |
| Campsis grandiflora | Chinese trumpet vine |
| Campsis radicans | Trumpet Creeper; trumpet vine; yellow trumpet vine; Trumpet creeper |
| Cardiospermum halicacabum | Balloon vine |
| Carissa macrocarpa | Natal Plum, Amantungula Numnum |
| Carpobrotus acinaciformis | Hottentot Fig |
| Carpobrotus edulis | Hottentot-fig, Common Sourfig |
| Carya illinoinensis | Nogal morado, Pecan tree, Hardy pecan |
| Cascabela thevetia | Be-still tree |
| Casuarina equisetifolia | Australian beefwood; Forest oak; Shingle oak |