Observation 105120: Buellia triseptata A. Nordin

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

Who: Jason Hollinger (jason)

Specimen available

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)


Apothecia at various ages, at 30x, stacked.
Old apothecia, at 30x, stacked.
Spores in water, at 400×.

Proposed Names

92% (2)
Eye3 Eyes3
Recognized by sight

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Great, thanks for the info!
By: Jason Hollinger (jason)
2016-05-07 13:23:14 CDT (-0400)

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… :(

By: J-Dar
2016-05-07 12:37:41 CDT (-0400)

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-
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)
Show Log