Northwest Lichenologists

Umbilicaria unidentified

  • 10 Apr 2021 7:32 AM
    Message # 10294817
    Clapperton Ranch: Several very dry 15mm unidentified Umbilicaria sp. with pale tan, rugose underside, no rhizines...on east rock face at mod. elev. in sagebrush steppe yesterday Thompson River Valley Southern Interior BC Canada..have never seen before and would appreciate any help with ID. (have sample in fridge to spot test using dissection scope with K, KC, C, P...if those are of any use with?)
    5 files
    Last modified: 14 Apr 2021 7:03 AM | Chris Rimmington
  • 11 Apr 2021 6:18 AM
    Reply # 10298846 on 10294817
    Bruce McCune (Administrator)

    Definitely not U. lambii, which is almost black and has smooth disks.


    It would help to see the lower surface.

  • 14 Apr 2021 7:08 AM
    Reply # 10312249 on 10294817

    Thanks! Bruce....sorry, did not see your reply til now...the added pics of specimen's lower thallus surface show bit darker now it is dry. Now I know more about what it is not and something more of U. lambii

  • 15 Apr 2021 8:07 AM
    Reply # 10315863 on 10294817
    Bruce McCune (Administrator)

    This is a challenging one. Lower surface is platy like U. torrefacta, but the upper surface doesn't look like that species. It could be one of the recently described species in 


    http://nhm2.uio.no/botanisk/lav/Graphis/30_6/GS_30_65.pdf


    or


    https://doi.org/10.1639/0007-2745-117.2.170


    But it doesn't seem quite right for any of those. Definitely worth checking the spores.



  • 15 Apr 2021 7:05 PM
    Reply # 10317597 on 10294817

    Interesting! You sure have spent some time with these wonderful critters. The lack of obvious rhizines is particularly curious....will see if I can measure and ck shape of the spores and get back to yoypu....appreciate your direction and these excellent articles exploring the vast depths of U.   

    Chris

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