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… :(