Observation 85358: Fuscopannaria pacifica P.M. Jørg.
When: 2011-12-28
Who: Byrain
No herbarium specimen

Notes: Found growing on a somewhat mossy lump of earth along an overgrown and mostly forgotten side trail.

About the chemistry, I would think it would be K- and C-, C alone wouldn’t even stain the thallus and slid off effortlessly. And KC may have brought out some color, but I am unsure what with that blue background…

I collected a few pieces with apothecia and will work on them in the future.

Proposed Names

28% (1)
Recognized by sight
56% (1)
Used references: Jørgensen, P.M. 2000. Survey of the lichen family Pannariaceae on the American continent, north of Mexico. The Bryologist 103(4): 670-704.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
I think “corticolous”
By: Jason Hollinger (jason)
2011-12-30 12:20:12 PST (-0800)

But don’t quote me! :) My reasoning is as follows: I’m familiar with only a few species. One, F. leucosticta, is very common back east, and it is considered “corticolous”, but it can grow on sufficiently thick moss anywhere, including mossy rocks. F. leucophaea, however, is considered “saxicolous”, and so far as I know, it grows only directly on rock (or maybe very thin moss over rock). It is possible, however, that either can grow on thick moss in extreme cases.

It seems to me, knowing spore size can only help. Don’t ask me to make sense of “bluish”, “thick” or any of the rest of it, though. :)

By: Byrain
2011-12-30 11:43:13 PST (-0800)

If I am understanding this correctly, spores should help greatly? I’ll see if I can find some and measure them. And would you interpret the habitat as corticolous or saxicolous?

Also, on an interesting side note, that dried up moss appears to be K+r.

By: Jason Hollinger (jason)
2011-12-30 11:24:42 PST (-0800)

This genus is usually overlooked, often quite rare. According to my own research, F. pacifica (related to F. saubinetii which is covered in Lichens of North America) is the only species known to be present in this region. (There are a few more species farther north in California, F. leucostictoides and F. pulveracea, neither of which matches.)

Chemistry is mostly lacking in the genus. A few species have atranorin in the cortex, but it’s typically impossible to detect without TLC. Related genera often have pannarin, which is P+ red, but I guarantee you this is Fuscopannaria not Pannaria or Parmeliella.

The key in Jørgensen 2000 isn’t very good (IMHO), but here’s the part that’s applicable:

23. Squamules bluish, delicately incised. Apothecia
convex, pinkish brown, usually without thalline
margin; spores small (usually less than 15 ␮m);
asci with amyloid sheets -——————— 23. F. saubinetii
23. Squamules usually brownish, less delicately in-
cised. Apothecia only occasionally convex, but
then brown, margin variable; spores larger (usu-
ally more than 15 ␮m); asci with amyloid ring-
structures -———————————————————————————————— 24
24. Thallus shiny brown with whitish margins
and terpenoids -——————————————- 25. F. thiersii
24. Thallus dull brownish (or bluish) without
whitish margins and terpenoids -————————— 25
25. Thallus usually buff, mainly corticolous. Spores
large (to 20–25 ␮m long); western -—————————- 26
25. Thallus usually darker brown, saxicolous. Spores
smaller (to 16 ␮m); widespread -—————————————-
-————————————————————————————————— 14. F. leucophaea
26. Squamules entire or shallowly incised,
spores to 20 ␮m -———————————- 19. F. pacifica
26. Squamules deeply incised, spores to 25 ␮m
-————————————————————————————— 11. F. incisa

Created: 2011-12-30 10:38:51 PST (-0800)
Last modified: 2011-12-30 11:14:10 PST (-0800)
Viewed: 42 times, last viewed: 2015-10-10 21:18:56 PDT (-0700)
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