​WATER-GLADIOLE, or Cardinal Flower, Lobelia Dortmanna, L. is an indigenous perennial, growing in mountainous lakes, especially in Cumberland, Westmoreland, Wales, and Scotland; where its beautiful pale, blue flowers appear in the months of July and August.—The whole of this plant, which grows beneath the surface of the water, abounds with a milky juice. It may be easily propagated by seeds, by offsets, or by cutting; and, vegetating with great luxuriance, it deserves to be raised in moist or marshy situations.