Observation 105120: Buellia triseptata A. Nordin
When: 2012-08-03
(34.2543° -118.1045° 1577m)
Herbarium specimen reported

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

249115
20120803-216.jpg
Apothecia at various ages, at 30x, stacked.
249116
20120803-217.jpg
Old apothecia, at 30x, stacked.
249117
20120803-148.jpg
Spores in water, at 400×.

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Comments

Add Comment
Great, thanks for the info!
By: Jason Hollinger (jason)
2016-05-07 10:23:14 PDT (-0700)

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… :(

Chemistry
By: J-Dar
2016-05-07 09:37:41 PDT (-0700)

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 17:48:23 PDT (-0700)
Last modified: 2016-05-07 09:35:49 PDT (-0700)
Viewed: 33 times, last viewed: 2016-10-20 17:48:44 PDT (-0700)
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