gymnosporangium

Century Dictionary and Cyclopedia

1. n. 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. The species are parasitic on the leaves and branches of coniferous trees belonging to the suborder Cupressineæ, in which they produce various distortions. See cedar-apple.

WordNet 3.0

1. n. 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