urbpan: (dandelion)
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These little orange spots are spore-producing regions of a fungus that causes a canker disease of wood. The wood in this case is a root protuberance in the pathway, undoubtedly constantly stepped on and otherwise stressed. The fungus took advantage of the broken and worn wood to grow inside as a weak parasite. The fungus is known as coral spot Nectria cinnabarina*, for the colorful spore-bearing wounds it causes.

*Cinnabar-colored (orange) killer.
urbpan: (dandelion)
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On xmas day, since I had the day off, I puttered around the house. Messed about on the internet for hours, and played with dogs. Also I walked around the yard looking for mushrooms. Sounds crazy, looking for mushrooms in late December, but it's been rainy and fairly warm lately, so it could happen.

Back in the brush pile there's a sapling Norway maple (about 3 inches diameter) trunk laying there. This beautiful fresh bloom of coral spots caught my eye.

As I backed out of the pile I saw what looked like mushroom caps--could it be?

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Holy crap! I didn't think to take a sample for a spore print. Feels a little like a honey mushroom but a little wrong. Could be growing out of anything--it's coming from a huge pile of dead wood, but there are live tree roots under there too.

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I'm just happy that they are there. If they're still there this weekend I might put some more effort into identifying them.
urbpan: (dandelion)
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I'd like to mark all the corners of the year with visits to places that fill me with the awe of nature. It might not always be possible, and honestly I wasn't even thinking of the date when I decided to bring Charlie to Cutler Park--it was just warm.

Read more... )
urbpan: (dandelion)


Coral spot Nectria cinnabarina

About a year ago I cut down a dozen or so Norway maple saplings and arranged the cut wood along a retaining wall by size. The stumps of the saplings act as brackets keeping the piles of cut wood in piles not spilling into the yard. Recently I've noticed the cut logs are breaking out in fungal skin conditions. A few have this beautiful coral spot acne, some have a dry rash of gray-lilac crust, and a couple manifested a growth of Porodisculus pendulus; there is also the unknown fungus in this other post.

Coral spot is one of those creatures I never noticed until I started making a habit of noticing everything. I first saw it in Forest Hills Cemetery I believe, and was stunned by it's beauty and mystery.

The spots produce two generations of spores, first asexual spores called conidia, then sexual spores called perithecia erupt from the same structures. Especially unlovely photographs of these stages are available here.


Also I found some bird's nest fungi growing on an old rotten board in the back of the yard. I thought for sure it was new for the project but nope I covered the same species in 2011.
urbpan: (Default)

Mist enshrouds the golf course at Franklin Park


Which sets the fruiting bodies of coral spot fungus into delicious high contrast.
urbpan: (Me and Charlie in the Arnold Arboretum)


My new favorite park (because it is close, fully fenced, uncrowded, and woody) Dane Park in Brookline near the Newton line, was were I took Charlie yet again this weekend.
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urbpan: (cold)


Urban Species #026: Coral Spot Nectria cinnabarina

Coral spot is a fungus that produces colorful spore-producing lesions in the bark of trees, especially thin-barked trees like beech. It also may attack other urban trees including honey locust, mulberry, apple, and maple. Most often it attacks trees that are already weakened or dead. Coral spot adds a welcome splash of color to the gray winter landscape of the urban forest.

some pictures of coral spot on a rainy Thanksgiving day )

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