Observation 10320: Lecanora juniperina Śliwa
When: 2008-06-24
Herbarium specimen reported

Notes: 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.

Images

19332
30x magnification
19333
Apothecial section, in water, at 100×.
19334
Apothecial section, in water, at 100x, in cross-polarized light.
19335
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)
Eye3
Recognized by sight

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

Add Comment
No one has commented yet.

Created: 2008-09-01 22:18:31 BST (+0100)
Last modified: 2008-09-01 22:24:23 BST (+0100)
Viewed: 25 times, last viewed: 2016-03-20 21:19:07 GMT (+0000)