. . "The botanical class-book, and flora of Pennsylvania designed for seminaries of learning and private classes"@en . . "Flora of Pennsylvania"@en . . . "The botanical class-book and flora of Pennsylvania designed for seminaries of learning and private classes"@en . . . "Electronic books"@en . . . . . . . . . . "The botanical class-book, and flora of Pennsylvania, designed for seminaries of learning and private classes" . . . . . "Botany Pennsylvania." . . "Pennsylvania." . . "Botany." . .