Notes:
It is on granitic and diabasic blocks along edges of pine-tree forest in rather dry environment.

Images

Lecanora albescens_GPS_20.JPG
Lecanora albescens_GPS_20_.JPG
Lecanora albescens_GPS_20_1.JPG
GPS_20_NaClO_test_1min.JPG
GPS_20_NaClO_test_5min.JPG

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= Observer’s choice
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Comments

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Hi Jason! Thank You for your useful advice!
By: Igor (Igor_Yevdokimov)
2018-05-06 22:59:33 PDT (-0700)

Hi Jason! Thank You for your useful advice!
Yes, too much of chemicals, small amount is more yellow

Good example of how applying too much C washes out the reaction
By: Jason Hollinger (jason)
2018-05-06 11:18:38 PDT (-0700)

This species should have a vivid yellow-orange reaction to C. But too much will cause it to bleach out. You can see the orange faintly around the margins of the spot test. Otherwise, I think you’re mostly just seeing what the color of the apothecia is under all the white pruina. The white pruina is composed of crystals of a xanthone which is responsible for the C+y/o reaction. Once it reacts and washes away, you can see the pale yellowish-brownish hymenium below.

You might try applying the reagent with a toothpick instead, for example. Or a finer-tipped dropper. Or a paint brush.

Created: 2017-05-08 09:13:41 PDT (-0700)
Last modified: 2018-05-06 22:59:34 PDT (-0700)
Viewed: 55 times, last viewed: 2019-08-12 11:51:15 PDT (-0700)
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