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When: 2008-06-08

Collection location: Plateau above Echo Cliffs, Coconino Co., Arizona, USA [Click for map]

Who: Jason Hollinger (jason)

Specimen available

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

magnifcation 30x
magnification 10x
apothecial section, in water, at 100x
apothecial section, in K, at 400x
asci with spores and paraphyses, in water, at 1000x
asci with spores, in K/I, at 1000x
two spores, in K/I, at 1000x

Proposed Names

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

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= Observer’s choice
= Current consensus

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