| | S | M | T | W | T | F | S | | 29 | 30 |
1
|
2
|
3
|
4
|
5
| |
6
|
7
|
8
|
9
|
10
|
11
|
12
| |
13
|
14
|
15
|
16
|
17
|
18
|
19
| |
20
|
21
|
22
|
23
|
24
|
25
|
26
| |
27
|
28
|
29
|
30
|
31
| 1 | 2 |  » Stats |
Members: 50,155
Threads: 82,346
Posts: 853,238
Top Poster: glsammy (15,069)
| | Welcome to our newest member, Bluepjs | |  | 
28-01-2012, 08:37 AM
|  | Wild Member | | Join Date: Aug 2009 Location: South Uist, Outer Hebrides
Posts: 174
| | | Green Lichen(s)
Site: coastal graveyard.
At the time I thought these were separate species. Green Lichen One was growing on concrete covering a large area. It appeared sterile but on examining the images at home I notice a couple of apothecia which I have greatly enlarged. Close by on a prostrate, polished granite headstone, and hence open to full sun and rain, was a similar looking species but covered in apothecia.
Later close comparison of the images suggest they might be the same with the different characteristics being accounted for by the different substrates and positions. Microscopy to follow, if apothecia are mature.
Help and guidance requested as usual.
Chris      |
28-01-2012, 08:51 AM
|  | Commander of the Wild Empire | | Join Date: Jun 2007 Location: SW Ireland
Posts: 1,668
| | | Re: Green Lichen(s)
Hi Chris - looks like Physcia caesia |
28-01-2012, 09:56 AM
| | Wild Member | | Join Date: Aug 2009 Location: South Uist, Outer Hebrides
Posts: 174
| | | Re: Green Lichen(s)
Hi Jenny
That was quick. I got started on Physcia by looking through Paul Whelen's excellent litte book, but the images in Dobson shown no sign of any green. If I had found them on your site (looking under crustose!) I may have been more encouraged. You clearly think they are one and the same? Some extra doubt crept in when I read that apothecia are rare (Smith et al), which was certainly the case with the concrete specimen.
The spores are spot on.
Many thanks, Chris  |
28-01-2012, 10:18 AM
|  | Commander of the Wild Empire | | Join Date: Oct 2008 Location: Huddersfield, West Yorkshire
Posts: 3,648
| | | Re: Green Lichen(s)
Quote:
Originally Posted by chrisjohnson  | hi Chris
are those spores in a stain, if so which one out interest?
(another) Chris
__________________
"You must know it's right - The spore is on the wind tonight"
--Steely Dan, "Rose Darling" |
28-01-2012, 10:29 AM
| | Wild Member | | Join Date: Aug 2009 Location: South Uist, Outer Hebrides
Posts: 174
| | | Re: Green Lichen(s)
Hi (another, more knowledgeable) Chris
Yes, Melzer's first then a touch of Cotton Blue.
Chris |
28-01-2012, 10:40 AM
| | Commander of the Wild Empire | | Join Date: Jun 2007 Location: SW Ireland
Posts: 1,668
| | | Re: Green Lichen(s)
Quote: |
If I had found them on your site (looking under crustose!)
| Err, they're in the foliose section!
Many lichens are greener when wet and I think fertility can depend on where you are - in SW Ireland I've found plenty of fertile specimens of species which the books say are 'rarely fertile'.
Physcia spores are dark so even without a stain its possible to get a decent image - if you scroll down my page on Physcia aipolia you'll see spore photographs obtained without a stain: Physcia aipolia
Last edited by JennyS; 28-01-2012 at 10:49 AM.
Reason: Added link to spore photos
|
28-01-2012, 11:04 AM
| | Wild Member | | Join Date: Aug 2009 Location: South Uist, Outer Hebrides
Posts: 174
| | | Re: Green Lichen(s)
Quote:
Originally Posted by JennyS Err, they're in the foliose section! | Yes, got there second time around!
Take your point regarding stains: I tend to use stains as they can emphasize other structures such as the paraphyses.
Chris | | |
| Thread Tools | | | | Display Modes |  Linear Mode |
Posting Rules
| You may not post new threads You may not post replies You may not post attachments You may not edit your posts
HTML code is Off
| | |
| | | 34 members and 365 guests | | alanc15, Birdman1976, Bluepjs, britnik, deano69, DecTob, Dillybythesea, Dorts, Douglas, Ferret, GTH, Hedgehoggy, Jason Green, kathyheel, ladyhawk, linda francis, Littlesparrow, Naturenutz, othona, oxycera, Pepsis, rmc, RobinP, Roger Morris, septic, Sofija, spaldingd, tcvarlh, tigertom, Tobyh, Ukwildlifeo, vole-woman, waxcap, willowjay | » New Wildlife Posts | | | | | | | | | | | | |   baby crow Today 08:09 PM 5 Replies, 103 Views | | | » New Environment Posts | | | | | | | | | » New Activity Posts | | | | | | | | | » New Community Posts | | | Spammers! Yesterday 08:00 AM 5 Replies, 117 Views | | | | | |
