Nepenthes 'Louisa' aka 'Loes' is a highland cross between;N.cv Rebecca Soper and N.hirsuta. This vigorous and easy-to-grow plant, grows large pitchers to;around 20 cm. They are olive green colour with red to purple markings inside the mouth of the pitcher. The outer surface of the pitcher is pubescent.

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Genus epithet 'Nepenthes' derived from Greek terms 'ne' (not) and 'penthos' (sorrow, grief), meaning 'no sorrow' or 'banished sorrow', as based on the ancient Greek name for an antidepressant drug called 'Nepenthe' which drives away all sorrows by the means of forgetfulness, and used here in connection with the reported medicinal qualities of some Nepenthes species.