Which of these plants is referred to in the title of a book by George Orwell?

First published in 1936, "Keep the Aspidistra Flying" is a novel by George Orwell (born Eric Arthur Blair, 1903-1950).

In contrast to his famous dystopian works such as "Animal Farm" and "Nineteen Eighty-Four", this work is set firmly in the real world, and though only ever presented as a novel, also has a biographical element. Like the protagonist, Gordon Comstock, Blair went through a spell of despising money and the capitalist system, despite his own roots being firmly middle-class. He abandons a well-paid job at an advertising agency to take lowly work and further his calling as a poet. However, he has little success at this, and his one published work, a slim volume interestingly called "Mice", merely gathers dust on bookshop shelves.

During this time, he pursues a relationship with the like-minded Rosemary, but also is drawn down into a cycle of debt, liaisons with prostitutes, and a night spent in a police cell after unruly behaviour.

Although he and Rosemary have split up, when she reveals to him that she is pregnant, he does the decent thing and marries her, though it is a loveless marriage. By the end of the novel he has abandoned all his proletarian principles, and even insists on buying an aspidistra, seen since Victorian times as symbolic of respectability (and famously parodied in the song by Gracie Fields!).