Panaeolus acuminatus

Panaeolus acuminatus, also known as Panaeolus rickenii is a common little brown mushroom.

Panaeolus acuminatus
Scientific classification
Kingdom:
Fungi
Phylum:
Basidiomycota
Class:
Agaricomycetes
Order:
Agaricales
Family:
Bolbitiaceae
Genus:
Panaeolus
Species:
P. acuminatus
Binomial name
Panaeolus acuminatus
Synonyms

Panaeolus rickenii

Panaeolus acuminatus
float
Mycological characteristics
gills on hymenium
cap is convex
hymenium is adnexed
stipe is bare
spore print is black
ecology is saprotrophic
edibility: unknown

This species contains small amounts of serotonin (licit tryptamine), 5-HTP, and tryptophan.

Description

This is a little brown mushroom that grows on dung and has black spores. It has a cap that is less than 4 cm across, hygrophanous, conic to campanulate to plane, usually with an umbo. The gills are dark purplish black, crowded, with several tiers of intermediate gills. The spores are (11) 13 - 15 (17) x 9 - 11 (12) x (6.5) 7 - 8 (9) micrometers, smooth, black, and shaped like lemons.[1] Cheilocystidia present.

Habitat and distribution

Panaeolus acuminatus is a mushroom that grows in grass and in dung. It has been found throughout North America and Europe and is very widely distributed.

gollark: I actually stole this particular quicksort from a r/haskell post talking about it.
gollark: ```lisp (let (partition_rec xs pred acc) (cond ((= xs '()) acc) (true (partition_rec (tail xs) pred (cond ((pred (head xs)) (list (cons (head xs) (head acc)) (snd acc))) (true (list (head acc) (cons (head xs) (snd acc)))) ))) )) (let (qsort xs cont) (cond ((= xs '()) (cont '())) (true (do (let h (head xs)) (let t (tail xs)) (let part_result (partition_rec t (lambda (x) (< x h)) '(() ()))) (qsort (head part_result) (lambda (ls) (qsort (snd part_result) (lambda (rs) (cont (+ ls (list h) rs)))))) )) ))```These all have to be done tail recursively or it could overflow.
gollark: Continuation passing style quicksort in a hilariously slow interpreter.
gollark: It manages *1* second, which is great.
gollark: When writing osmarkslisp™, I cared about performance to the extent that it would sort a list of 200 integers in under 5 seconds.

See also

References
  1. Gerhardt, E: Taxonomische Revision Gattungen Panaeolus und Panaeolina, page 73. 1996


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