gymnosporangium

from The Century Dictionary.

• noun A genus of fungi, of the order Uredineæ, having mostly two-celled (sometimes one- to six-celled) yellow or orange spores borne on slender pedicels, and embedded in jelly, which when moistened swells into columnar or irregularly expanded masses.

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

• noun genus of fungi that produce galls on cedars and other conifers of genera Juniperus and Libocedrus and causes rust spots on apples and pears and other plants of family Rosaceae