Penstemon digitalis Penstemon digitalis Penstemon digitalis (foxglove beard-tongue, foxglove beardtongue, or talus slope penstemon) is a plant in the plantain family, Plantaginaceae. The flowers are white and are borne in summer. It is native to eastern Canada and eastern and southeastern United States. "Penstemon digitalis" is a glabrous 3 to 5 foot tall herbaceous plant with opposite, shiny green, simple leaves, on slender, purple stems. The leaves are up to 5 inches long. While upright, the stems average anywhere from 2 to 3 feet tall. The flowering panicle extends to almost one third of the plant's height and has pairs of branches
Where Mathematics Comes From rethink a good deal of the philosophy of mind, epistemology, metaphysics, and the history of ideas. Where Mathematics Comes From Where Mathematics Comes From: How the Embodied Mind Brings Mathematics into Being (hereinafter "WMCF") is a book by George Lakoff, a cognitive linguist, and Rafael E. Núñez, a psychologist. Published in 2000, "WMCF" seeks to found a cognitive science of mathematics, a theory of embodied mathematics based on conceptual metaphor. Mathematics makes up that part of the human conceptual system that is special in the following way: Nikolay Lobachevsky said "There is no branch of mathematics, however abstract, which may