Observation 131046: Gymnosporangium effusum F. Kern

Notes:
Covering the lower portion of the trunks of living Juniperus virginiana (Eastern Red Cedar). These were thick on the bases up to the midportions of the trunk, found on 3 trees with maybe a quart on each tree, in colums growing vertically up the trunk. This would be very different from the gall formed by G. juniperus-virginianae: http://mushroomobserver.org/91474?q=1B7ku
Fruitbodies were very delicate, falling off/disintigrating when touched (maybe this was due to age/weather).

Species Lists

Images

Teleospores in water mounts at 400x and 200x
Teleospores in water mounts at 400x and 200x
Teleospores in water mounts at 400x and 200x
Teleospores in water mounts at 400x and 200x
Dried telia on the trunks of Juniperus virginiana
Dried telia on the trunks of Juniperus virginiana
Dried telia on the trunks of Juniperus virginiana

Proposed Names

85% (1)
Recognized by sight: Telia caulicolous, in long series on trunk of Juniperus virginiana, range: New York to South Carolina
Used references: Handbook of North American Uredinales
Based on microscopic features: teliospores oblong-ellipsoid 16-22 × 45-55 microns, wall brown, 1-2 microns thick

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= Observer’s choice
= Current consensus

Comments

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Fruiting bodies on the trunk
By: Christine Braaten (wintersbefore)
2013-04-09 13:32:59 CDT (-0400)

Here are several images showing gelatinous telial lobes emerging from the trunks of Juniperus virginiana, labled Gymnosporangium juniperus-virginianae:
http://www.forestryimages.org/...
http://www.forestryimages.org/...
http://www.forestryimages.org/...

Did you measure the teliospores?
By: Byrain
2013-04-05 13:30:56 CDT (-0400)

Created: 2013-03-31 00:13:00 CDT (-0400)
Last modified: 2013-04-11 20:21:00 CDT (-0400)
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