Observation 31029: Amanita gemmata group
When: 2009-12-28
Herbarium specimen reported

Notes: Growing on a fairly open slope with shaly,mineral soil. Under Madrones (Arbutus menziesii).

The Universal veil can be rubbed off easily.
I am drying it

[admin – Sat Aug 14 01:58:19 +0000 2010]: Changed location name from ‘Bear Creek Trail, Briones Reservoir, Contra Costa County, California, USA’ to ‘Bear Creek Trail, Briones Reservoir, Contra Costa Co., California, USA

Images

71841
71842
71843
71844
71907
paler specimens
71908
paler specimens
71909
paler specimens
71910
Spores at 1000x smooth, inamyloid, oblong to ellipsoid 11.5-13 (14)µm x 7-8 µm

Proposed Names

24% (5)
Eye3
Recognized by sight: Pale yellow cap, No partial veil
Based on microscopic features: Spores smooth, inamyloid, oblong to ellipsoid 11.5-13 (14)µm x 7-8 µm
30% (4)
Eyes3
Recognized by sight: not aprica. not exannulata with its membranous volva. something that needs a new name, in the gemmata group.

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

Add Comment
warts
By: Erlon (Herbert Baker)
2009-12-29 08:15:58 PST (-0800)

Using one variable morphological characteristic like veil remnants to define a species may not be the best approach. The spores seem to be well within the range for A. aprica. Perhaps A. aprica “group” would be more correct, as they are probably closer to that species than than they are to A. gemmata, which does not occur in north america.

for the record…
By: Debbie Viess (amanitarita)
2009-12-29 08:06:10 PST (-0800)

the UV or warts on the cap of an aprica cannot be easily removed; the veil actually grows into the cap tissue. it is simple to test this in the field…just try to scrape a bit of the warts off with your fingernail.

spores
By: Richard Sullivan (enchplant)
2009-12-29 06:18:27 PST (-0800)

For what that is worth I have added a picture of the spores.

I thought A. aprica was a Mountain species
By: Richard Sullivan (enchplant)
2009-12-29 05:59:39 PST (-0800)

Hi Herbert, I didn’t go with A. aprica because I thought it was a Sierra Nevada species, but It seems to fit fine otherwise. There were some specimens nearby that were very pale almost white.

Created: 2009-12-28 18:29:05 PST (-0800)
Last modified: 2010-11-26 01:11:13 PST (-0800)
Viewed: 118 times, last viewed: 2016-05-28 20:19:51 PDT (-0700)
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