When: 2018-09-02
Collection location: Government House, Rockland, Victoria, British Columbia, Canada [Click for map]
48.4187°N 123.3409°W 50m [Click for map]
Who: Oluna & Adolf Ceska (aceska@telus.net)
Notes:
Original_Herbarium_Label: Agaricus bresadolanus Bohus
Syn.: Agaricus romagnesii Wasser
Location: Canada, British Columbia, Victoria, Rockland, Government House
location_detail: in the lawn border E of the Government House
Long.Lat.Elev.: 48.4187° -123.3409° 50m
Habitat: flower bed under various trees, incl. Fagus silvatica
Host/Substrate: rooted in the leaf compost
Date: 2018-08-27
Collector(s): Oluna Ceska
Identified_by: Oluna Ceska
Comment(s): Conspicuous copious rhizomorphs
NH3: flesh -, cup surface slighly + (yellowish)
Bruising brown
Species Lists
Images
| User’s votes are weighted by their contribution to the site (log10 contribution). In addition, the user who created the observation gets an extra vote. | |||||||||
| Vote | Score | Weight | Users | ||||||
|---|---|---|---|---|---|---|---|---|---|
| I’d Call It That | 3.0 | 6.53 | 1 | (aceska@telus.net) | |||||
| Promising | 2.0 | 0.00 | 0 | ||||||
| Could Be | 1.0 | 0.00 | 0 | ||||||
| Doubtful | -1.0 | 0.00 | 0 | ||||||
| Not Likely | -2.0 | 0.00 | 0 | ||||||
| As If! | -3.0 | 0.00 | 0 | ||||||
| Overall Score sum(score * weight) / (total weight + 1) |
2.60 | 86.72% | |||||||
The photos, especially of the ring and the color of the pileipellis, strongly suggest that this distinctive and beautifully photographed mushroom belongs in section Xanthodermatei. That said, it is not a species familiar to me. You ought to try to obtain an ITS DNA sequence. Also, you would want to use KOH or NaOH on surfaces and context; I don’t find NH3 useful. Also, the odor is important.
For us, ‘rooted’ means deeply embedded, while the presence of rhizomorphs is fairly common among diverse Agaricus species.
Agaricus bresadolanus belongs to a different section, Spissicaules, and may have an almond odor. There has been confusion about the name and identity of A. romagnesi, most recently treated as a synonym of A. bresadolanus; the taxonomic problem was discussed in Kerrigan et al. 2005 (Mycologia) and later in the books by Parra.
Hope that helps. Nice find.