280 days of Urbpandemonium #217

[urbpan]

I really wish I had taken a better picture of this, my favorite Ascomycete. (Ascomycota is the smaller of the two main divisions of mushrooms; most mushrooms you can think of are Basidiomycetes; morels, cup fungi and most lichenized fungi are Ascos; the main difference is the shape of the spore-producing cells.) The green stain cup Chlorociboria aeruginascens* not only produces a blue-green fruiting body, but its mycelium stains its wooden substrate the same color. Often you might come by a chunk of dead wood stained this color, but I consider it a special occasion to come across one putting out mushrooms. It's fun to be reminded how rare shades of blue are among living things.

*Green cup becoming blue green