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| English | Spanish |
| blue algae | algas azules |
| blue ash | fresno anguloso Fraxinus quadrangulata |
| blue beech | carpe americano Carpinus carolineana |
| blue birch | abedul azul Betula coerulea |
| blue flax | lino bravo Linum narbonense |
| blue leaved acacia | acacia de hojas azules Acacia cyanophylla |
| blue leaved acacia | acacia cianófila Acacia cyanophylla |
| blue leaved wattle | acacia de hojas azules Acacia cyanophylla |
| blue leaved wattle | acacia cianófila Acacia cyanophylla |
| blue lupine | altramuz azul Lupinus angustifolius |
| blue marsh vetchling | guija de pantano Lathyrus paluster |
| blue melilot | meliloto azul Trigonella coerulea |
| blue pine | pino llorón del Himalaya |
| blue sisal | sisal azul Agave amaniensis |
| blue spruce | picea azul Picea pungens, P. parryana |
| blue spruce | abeto de Parry Picea pungens, P. parryana |
| Colorado blue spruce | picea azul Picea pungens, P. parryana |
| Colorado blue spruce | abeto de Parry Picea pungens, P. parryana |
| Indian blue pine | pino llorón del Himalaya Pinus griffithii, P. excelsa |