Collection location: Forest near Elgin St., Pembroke, Ontario, Canada [Click for map]
A bluish lichen with pink branch tips, growing abundantly with a green lichen in open areas near the woods and in clearings.
|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.|
|I’d Call It That||3.0||0.00||0|
sum(score * weight) /
(total weight + 1)
Best I can tell, looking at all my books, there are three possible species for this observation. (I’m ruling out the much more compact Cladina stellaris — you’ll recognize it in a second when you see it). They are:
|C. arbuscula||greenish/yellowish, branching lower “like an elm”|
|C. mitis||greenish/yellowish, branching higher “like an aspen”|
|C. rangiferina||whitish/bluish, main stems unbranched “like a conifer”|
All three branch in 2’s, 3’s and 4’s, the average number varying from author to author. Photos in Brodo indicate that at least the first two have gaping holes in their axils (as do yours), I can’t find anything about the axils of C. rangiferina. The branch tips of some droop to one side making them look “windswept” or “combed”: C. rangiferina usually is, C. mitis is never, C. arbuscula seems to be variable. Some of yours are (see the white one in the bottom left of the second photo, for example), some are not.
The color difference is very subtle. Seen by itself, I still can’t say with certainty whether one is “yellow” or not (meaning very slightly greenish-white instead of very slightly bluish-white). However, your photo, especially number four, shows both colors side-by-side very nicely.
The only way to really be sure (aside from showing them to your neighborhood lichenologist) is chemistry:
|C. arbuscula||branches KC+ gold, PD+ orange/red|
|C. mitis||branches KC+ gold, PD-|
|C. rangiferina||branches KC-, PD+ orange/red|
Hope that helps! Good luck…
Created: 2008-10-19 09:26:43 PDT (-0700)
Last modified: 2008-10-19 09:26:43 PDT (-0700)
Viewed: 6 times, last viewed: 2017-06-05 01:52:17 PDT (-0700)