polianthes

from The Century Dictionary.

• noun A genus of ornamental plants of the order Amaryllideæ and tribe Agaveæ, characterized by the long undivided raceme bearing twin flowers with a prominent and incurved tube dilated upward into thick, spreading lobes, by the conical ovary within the base of the perianth, and by the short, erect, tuberous rootstock.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun genus of perennial tuberous herbs having lily-like flowers; Mexico; sometimes placed in family Amaryllidaceae