Observation 190684: Agaricus L.
When: 2014-10-26
No herbarium specimen

Notes: White to off-white caps with what appears to be appressed scales and light yellowish coloration on the disc with some small deppressions and aerolate cracks on the disc in older specimens. Caps 50-130 mm diameter. Flesh white, thick, solid. Gills pinkish white to pinkish to brown, crowded, free, narrow compared to the flesh. Sets of lamellulae present. Odod pleasant, taste not distinctive. Partial veil present in young specimens. Stipe 9-11 cm long x 18-28 mm at apex, enlarging towards base, brittle with white flesh and some fine fibrils. Terrestrial near hardwoods. Found approx. 40’ from a main road. Spore print dark brown. Spores ranged from under 10 um to over 12 um long x 4.5 to 6.5 um. wide.

Proposed Names

28% (1)
Recognized by sight
19% (2)
Used references: Arora
Based on microscopic features: Spores larger than Agarics with which I have some familiarity.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Hello Debbie
By: Phil (gunchky)
2016-02-07 17:25:47 CST (-0500)

Just checked Les Champignons des Quebec, and it is listed in that paper. just taking a flyer here to promote some reactions, but my main reason for this proposal was Arora’s description of A. osecanus group, and I failed to read the distribution limits of A./ crocodilinus. Many thanks for your comments and info.

does crocodilinus even occur back east?
By: Debbie Viess (amanitarita)
2016-02-07 16:48:51 CST (-0500)

many Agaricus sp. get those cracked caps, and even crocodilinus can have a perfectly smooth cap!

yes, spores are quite large in crocodilinus, but it has a squat stature, unlike what you show here.

maybe someday we’ll actually have Kerrigan’s NA Agaricus book in hand to track down some of these anomalies?

Until then … who knows what this is?

Created: 2014-11-30 18:55:40 CST (-0500)
Last modified: 2016-02-07 16:44:23 CST (-0500)
Viewed: 63 times, last viewed: 2016-10-28 10:20:15 CDT (-0400)
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