Major Groups > Boletes > Gyroporus

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The Genus Gyroporus  

[ Basidiomycetes > Boletales > Gyroporaceae . . . ]

by Michael Kuo

Gyroporus is a very small genus of boletes whose members are easily recognized by their stems, which are brittle and hollow (at least towards the base in mature specimens) and their yellow spore prints. They grow primarily east of the Rocky Mountains, but at least one species, Gyroporus castaneus, is reported in California; a few species range south into Mexico and Central America.

Gyroporus spore print
Gyroporus Spore Print


Key to 7 Gyroporus Taxa in North America


1.Flesh staining (purplish, greenish, bluish) when sliced.
2

1.Flesh not staining when sliced.
4


2.Pore surface not bruising; cap reddish brown to yellowish brown; tropical and subtropical; spores 9-15 µ long.
Gyroporus phaeocyanescens

2.Pore surface bruising blue; cap buff to straw-colored; widely distributed in eastern North America; spores 8-10 µ long.
3


3.Flesh staining dark purplish blue; usually woodland.

3.Flesh staining greenish to dark blue, without purplish tones; frequently in sandy soil or disturbed ground--also woodland.


4.Cap yellowish brown, conspicuously hairy to scaly; spores 9.5-16 µ; recorded from Florida.
Gyroporus umbrinisquamosus

4.Cap differently colored (purplish, reddish brown, dark brown, pinkish, pale), not conspicuously hairy or scaly; spores shorter than above; variously distributed.
5


5.Cap pale (buff, yellowish, pinkish); pore surface bruising slowly pinkish brown; in sandy soil on the East Coast and the Gulf Coast.
Gyroporus subalbellus
illus. in Metzler & Metzler, 1992
and Weber & Smith, 1985

5.Cap more highly colored; pore surface not bruising; variously distributed.
6


6.Fresh cap and stem wine red to purplish.

6.Fresh cap and stem brown to chestnut brown or reddish brown.



References

Arora, D. (1986). Mushrooms demystified: A comprehensive guide to the fleshy fungi. Berkeley: Ten Speed Press. 959 pp.

Bessette, A. E., Roody, W. C. & Bessette, A. R. (2000). North American boletes: A color guide to the fleshy pored mushrooms. China: Syracuse UP. 399 pp.

Both, E. E. (1993). The boletes of North America: A compendium. Buffalo NY: Buffalo Museum of Science. 436 pp.

Coker, W. C. and Beers, A. H. (1943). The boleti of North Carolina. New York: Dover. 96 pp. (1971 reprint.)

Grund, D. W. & Harrison, A. K. (1976). Nova Scotian boletes. Germany: J. Cramer. 283 pp.

Singer, R. (1945). The boletinae of Florida. Germany: J. Cramer. 126 pp. (1977 reprint.)

Smith, A. H. & Thiers, H. D. (1971). The boletes of Michigan. Ann Arbor: U Michigan P. 428 pp. An online version of this book is available here, at the University of Michigan Herbarium (URL too long for duplication).

Smith, A. H., Smith, H. V. & Weber, N. S. (1981). How to know the non-gilled mushrooms. Dubuque, Iowa: Wm. C. Brown. 324 pp.

Snell, W. H. & Dick, E. A. (1970). The boleti of northeastern North America. Germany: J. Cramer. 115 pp.

Thiers, H. D. (1975). The boletes of California (online reprint of California mushrooms: A field guide to the boletes). Retrieved from the MykoWeb Web site: http://www.mykoweb.com/boletes/index.html



Cite this page as:

Kuo, M. (2005, March). The genus Gyroporus. Retrieved from the MushroomExpert.Com Web site: http://www.mushroomexpert.com/gyroporus.html

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