Panaeolus semiovatus var. semiovatus

Panaeolus semiovatus var. semiovatus, also known as Panaeolus semiovatus and Anellaria separata, is a medium-sized buff-colored mushroom/toadstool that grows on horse dung, and has black spores. It is generally regarded as inedible,[1] and a few people experience gastric upset after consumption. Its common names are the shiny mottlegill, or egghead mottlegill.

Panaeolus semiovatus var. semiovatus
Scientific classification
Kingdom:
Fungi
Division:
Basidiomycota
Class:
Agaricomycetes
Order:
Agaricales
Family:
Bolbitiaceae
Genus:
Panaeolus
Species:
P. semiovatus var. semiovatus
Binomial name
Panaeolus semiovatus var. semiovatus
Fr. (Lundell)
Synonyms
  • Agaricus ciliaris
  • Agaricus semiovatus
  • Agaricus separatus
  • Anellaria semiovata
  • Anellaria separata
  • Panaeolus semiovatus
  • Panaeolus separatus
Panaeolus semiovatus var. semiovatus
float
Mycological characteristics
gills on hymenium
cap is convex
hymenium is adnexed
stipe has a ring
spore print is black
ecology is saprotrophic
edibility: inedible

Description

The cap is up to 8 cm across, dark buff to white, parabolic to nearly convex in maturity. It is sticky when wet, and often wrinkles when dry. The stem is 15 cm by 20 mm, solid and smooth, with an annulus (ring) that is white, but is often found blackened by falling spores. The gills are adnexed, being wider in the middle, and narrowing at both ends, they are brown to black. The flesh is white, or straw-colored.[2][3]

This is a buff, or whitish-colored mushroom that grows in horse dung. It is widely distributed and is present in many temperate zones of the world.

The very similar Panaeolus semiovatus var. phalaenarum (Fr.) Ew. Gerhardt. 1996 syn. Panaeolus phalaenarum (Bull.) Quel. is more slender (cap 2–4 cm), and lacks the ring.[4]

As seen below, this mushroom varies from white to dark buff in coloration.
  • Wild Panaeolus semiovatus var. semiovatus
  • Panaeolus semiovatus var. semiovatus on horse manure.
  • Close up of cap and gills. Note the black spores.
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See also

References
  1. Phillips, Roger (2010). Mushrooms and Other Fungi of North America. Buffalo, NY: Firefly Books. p. 236. ISBN 978-1-55407-651-2.
  2. Roger Phillips (2006). Mushrooms. Pan MacMillan. ISBN 0-330-44237-6.
  3. Thomas Laessoe (1998). Mushrooms (flexi bound). Dorling Kindersley. ISBN 0-7513-1070-0.
  4. Marcel Bon (1987). The Mushrooms and Toadstools of Britain and North Western Europe. Hodder and Stoughton. ISBN 0-340-39935-X.

Further reading
  • Stamets, Paul (1996). Psilocybin Mushrooms of the World. Berkeley: Ten Speed Press. ISBN 0-9610798-0-0.
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