Marasmius siccus

Marasmius siccus
Scientific classification
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Marasmiaceae
Genus: Marasmius
Species:
M. siccus
Binomial name
Marasmius siccus

Marasmius siccus, or orange pinwheel,[1] is a species of fungus in the Marasmius genus. It is found in Eurasia and eastern North America.

Description

The small orange mushroom has an umbrella-shaped cap which is 0.5–2.5 centimetres (1⁄4–1 in) wide. The gills are whitish. The tough shiny bare stem is pale at the top but reddish brown below, and 3–7 cm (1+1⁄4–2+3⁄4 in) tall.[2][3][4][5]

A cluster of M. siccus
Gills and the stem, which lightens at the top

Microscopic details

At a microscopic level, the club-shaped spores are very long and thin, being roughly 19 μm by 4 μm. The distinctive cheilocystidia are broadly club-shaped with finger-like protrusions at the far end. Such cells also sometimes occur in other related mushrooms and they are known as "broom cells of the siccus type".[4][5]

Similar species

M. fulvoferrugineus and M. pulcherripes are similar, but the caps are more pink.[6]

Habitat and distribution

This mushroom is found in hardwood forests. It is distributed in northern Europe and Asia,[4][5] and in North America from July to September,[6] from the Rocky Mountains to the Appalachians.[7]

Edibility

Although nonpoisonous, the mushrooms are too small to be considered worthwhile as food.[8]

References

  1. ^ "Marasmius siccus". Indiana University. Retrieved 16 February 2015.
  2. ^ Kuo, Michael. "Marasmius siccus". MushroomExpert.Com. Retrieved 16 February 2015.
  3. ^ "Marasmius siccus". University of Arkansas. Retrieved 16 February 2015.
  4. ^ a b c Antonín, V.; Noordeloos, M. E. (2010). A monograph of marasmioid and collybioid fungi in Europe. Berchtesgaden, DE: IHW Verlag. p. 84. ISBN 978-3-930167-72-2.
  5. ^ a b c Knudsen, Thomas; Vesterholt, J., eds. (2018). Funga Nordica Agaricoid, boletoid, clavarioid, cyphelloid and gasteroid genera. Copenhagen: Nordsvamp. p. 360. ISBN 978-87-983961-3-0.
  6. ^ a b Audubon (2023). Mushrooms of North America. Knopf. p. 461. ISBN 978-0-593-31998-7.
  7. ^ Kuo, Michael; Methven, Andy (2010). 100 Cool Mushrooms. Ann Arbor, MI: University of Michigan Press. p. 115. ISBN 978-0472034178.
  8. ^ Miller Jr., Orson K.; Miller, Hope H. (2006). North American Mushrooms: A Field Guide to Edible and Inedible Fungi. Guilford, CN: FalconGuide. p. 198. ISBN 978-0-7627-3109-1.