Observation 10320: Lecanora juniperina Śliwa

When: 2008-06-24

Collection location: Juniper Mountains, Yavapai Co., Arizona, USA [Click for map]

Who: Jason Hollinger (jason)

Specimen available

crustose lichen, on bark of juniper twig with Physcia
THALLUS: dispersed areolate, light gray, K-, C-, KC-, smooth
APOTHECIA: densely crowded; disc pale yellowish to blue-gray, flat, lightly grayish pruinose; rim prominant, raised, thalline, dentate; epihyenium yellowish, filled with abundant POL+ small white crystalline granules, granules insoluble in K; hymenium clear; hypothecium clear; cortex clear, with POL+ white small crystals insol in K
SPORE: 8 per ascus, clear, 1 cell, elliptical, smooth, 9.5+/-1.1 × 6.2/-0.8 µm (Q=1.5/-0.2) (N=10)

Very similar to Lecanora hagenii (I’m so tired of seeing L. hagenii!!), however the new species L. juniperina has been proposed for specimens with copious yellowish epihymenial granules which are insoluble in KOH. It is known to occur only in northern Arizona on exposed juniper and oak.


30x magnification
Apothecial section, in water, at 100×.
Apothecial section, in water, at 100x, in cross-polarized light.
Epihymenial granules, in water, at 1000×.

Proposed Names

58% (1)
Eye3 Eyes3
Used references: Nash’s Sonoran Flora
Based on microscopic features
Based on chemical features
29% (1)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2008-09-01 16:18:31 CDT (-0500)
Last modified: 2008-09-01 16:24:23 CDT (-0500)
Viewed: 26 times, last viewed: 2017-06-05 01:40:59 CDT (-0500)