leafless flower, or blue montpellier pink: A genus of the monocotyledon order, belonging to the hexandria clas of plants; and in the natural method ranking under the fifth order, Tetrapetalidae. In character it differs not from the juncus or rush, but in having a calyx of five petals, whereas the juncus has no calyx. There is only one species, the Montpelierens, a native of France. The root consists of a number of slender, hard, woody, long, and contorted fibres: the radical leaves are very numerous, two inches long, extremely narrow, and wither very quickly. The stalk is round, smooth, without a joint or knot, naked, and tolerably firm; at its top stands a single and very beautiful blue flower, arising from a kind of compound imbricated cup.