Color, deep blue. Flower, much like the last, with 3 perfect stamens, 3 sterile, bearing curious, cross-shaped anthers. The good stamens project from the flower on slender, long filaments. Of the flower 2 petals are much longer than the third. Leaves, lance-shape, sheathing above. Spathes, heart-shape, pointed. Flowers, in umbels. July to October.
Often a dooryard weed in New York and Massachusetts, frequently in city yards. South to Pennsylvania.