Observation 11514: Lignoscripta atroalba B.D. Ryan & T.H. Nash
When: 2008-06-08
Herbarium specimen reported

Notes: crust lichen, on juniper wood fragment
THALLUS: thin, light gray, K-, C-, KC-
MEDULLA: yellowish, K-, C-, KC-
ALGAE: green
APOTHECIA: somewhat elongate, black, immersed, epihymenium dark gray, hymenium clear and K/I+ weakly blue, paraphses clear and moniliform towarn end; asci K/I- or v weakly blue, clavate, tip not thickened, tip K/I-; all POL-
SPORES: 8 per ascus, clear, simple, elliptical, faintly K/I+ golden, 18+/-2 × 9.1+/-1.2 µm (N=9)

Update:

EPIHYMENIUM: blue-black, turning bluer in K, and N+ red-magenta

Spores are too large for any of the species now recognized in Xylographa. This must be Lignoscripta despite the apparent lack of any pruina. Chemistry, spore size, pigments all match perfectly. The paraphyses are moniliform, however, and the description of L. atroalba says they are filiform and merely expanded at the tips.

Images

22734
magnifcation 30x
22733
magnification 10x
22735
apothecial section, in water, at 100x
22736
apothecial section, in K, at 400x
22737
asci with spores and paraphyses, in water, at 1000x
22738
asci with spores, in K/I, at 1000x
22739
two spores, in K/I, at 1000x

Proposed Names

87% (1)
Eye3 Eyes3
Used references: Nash’s Sonoran Flora
Based on microscopic features: see notes
Based on chemical features: see notes

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2008-09-24 13:24:25 PDT (-0700)
Last modified: 2016-02-02 16:57:41 PST (-0800)
Viewed: 73 times, last viewed: 2016-10-26 23:32:52 PDT (-0700)
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