|gills on hymenium|
cap is conicalor flat
hymenium is adnateor sinuate
|stipe is bare|
|spore print is white|
|ecology is parasitic|
Tephrocybe palustris is a species of fungus in the family Lyophyllaceae which parasitizes sphagnum moss. It was first described by Charles Horton Peck in 1872. It is commonly called the Sphagnum Greyling due to it being found in peat bogs and to its cap turning grey as it ages and dries.
Tephrocybe palustris can be white pruinose when young and does not stain or bruise when crushed. It's flesh is thin, soft, and watery. The cap is 1 to 3 centimetres (0.39 to 1.2 in) in diameter, starting as conical or bell shape when young, expanding flat with a distinct umbo when older. It is smooth, striate, and hygrophanous; usually an olive-brown when moist, drying to a pale grey color. The white to grey gills are adnate or with a slight tooth. Subgills are often present creating a close to subdistant spacing. The stem is 2 to 10 centimetres (0.79 to 3.9 in) long and 1 to 5 mm (0.039 to 0.20 in) in diameter, equal and hollow. The coloring is usually lighter than the cap, being grey-brown or grey. The white to cream colored spores are 5.5 to 8.5 µm x 4 to 4.5 µm, elliptical, and smooth.
Distribution and habitat
Unknown, possibly poisonous. Odor and taste is flavorless or farinaceous.
Tephrocybe palustris parasitizes living sphagnum mosses by forming penetration pegs through hyphae pressure. At the tips of these pegs pectinases are produced to digest the lamella between leaf cells which facilitates entry into both hyaline and chlorophyllous cells. The result is a deterioration of the protoplast and necrosis of the cells. The rate of parasitic expansion is theorized to be related to the amount of available nitrogen in the host and parasite mediums.
- "Tephrocybe palustris (Peck) Donk 1962". Encyclopedia of Life. http://www.eol.org/pages/195011. Retrieved 15 May 2011.
- "Collybia palustris (Peck) A.H. Sm. 1936". MycoBank. http://www.mycobank.org/MycoTaxo.aspx?Link=T&Rec=273419. Retrieved 16 May 2011.
- Gibson, Ian. "LYOPHYLLUM and Allies in the Pacific Northwest". Pacific Northwest Key Council. http://www.svims.ca/council/Lyophy.htm. Retrieved 17 May 2011.
- "Lyophyllum palustre". Rogers Mushrooms. http://www.rogersmushrooms.com/gallery/DisplayBlock~bid~5826~gid~~source~gallerydefault.asp. Retrieved 15 May 2011.
- Davey ML, Currah RS: Interactions between mosses (Bryophyta) and fungi. Can J Bot 2006, 84:1509-1519
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