When: 2012-08-03
Collection location: San Gabriel Peak, San Gabriel Mountains, Los Angeles Co., California, USA [Click for map]
34.2543° -118.1045° 1577m
Notes:
HABITAT edge of oak forest on steep north slope; SUBSTRATE smooth Quercus wislenzii? bark; ASPECT mostly open; NOTES thick greenish crust, K+y(!) C- KC-, apothecia black and strongly convex, epihymenium and hypothecium red-brown; SPORES 3-septate, gray to brown, ~20 × 8 µm.
Shouldn’t be K+, but maybe it’s picking up atranorin from surrounding Lecanora? (large convex black apothecia, paler smoother crust)
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 | 10.99 | 2 | (J-Dar,jason) | |||||
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) |
2.75 | 91.66% |
Comments
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See Giralt et al. 2010. A New Chemotype of Buellia triseptata (Physciaceae). Excerpt below, seems like it is K+ in both chemotypes. Not sure why Nash describes it as K-.
Excerpt from Conclusion:
For the time being we regard Buellia triseptata as
comprising two distinct chemotypes. Chemotype 1
contains atranorin, with the thallus reacting K+
yellow, C2, KC2 and UV2. Chemotype 2 contains
atranorin and several xanthones of the 2,5,7-
trichloro-3-O-methylnorlichexanthone
chemosyndrome (see Table 1), with the thallus
reacting K+ orange, C2, KC+ orange (best seen
under the microscope) and UV6 orange
Created: 2012-08-13 20:48:23 CDT (-0400)
Last modified: 2016-05-07 12:35:49 CDT (-0400)
Viewed: 37 times, last viewed: 2018-01-14 23:03:42 CST (-0500)
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Never saw that paper. Cool.
Also, note that Bungartz did the Buellia treatment in Sonoran Flora III. Nash is just the lead editor. Bungartz must’ve just slipped up. It is a very big genus in the Sonoran region, one or two typos are bound to get through… :(