Pé de
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You use “pé de <fruit/vegetable>” to name a fruit tree or a vegetable plant. So a orange tree would be a “pé de laranja”, and in the same way, a lettuce plant would be a “pé de alface”.
Some fruits/vegetables also have special names. An orange tree can be a “pé de laranja” or a “laranjeira”. You are good saying both of them.
Examples
“Estranho é gostar tanto do seu All Star azul Estranho é pensar que o bairro das Laranjeiras” (All Star - Nando Reis)