Usnea shimadae Asahina

Family :

Parmeliaceae

Asahina, J. Jap. Bot. 45(5): 131 (1970)

ID :

BU/BRL/2022/039

Thallus :

Shrubby, compact, 2-8 cm long branching: isotomic-dichotomous, divergent basal part: distinctly paler than branches or of same color, with numerous and conspicuous annular cracks branches: usually ±irregular; lateral branches: not narrowed or slightly to distinctly narrowed at point of attachment; transverse furrows: terete to distinctly ridged, cylindrical to weakly sausage-like papillae: absent tubercles: present, low and verrucous, whitish or eroded on top (probably very young stages of fibrils), not sorediate fibrils: short (1-3 mm), often spinulous, mostly present in oldest part of thallus 

Lobes :

Upper Side:

Isidia :

Isidiomorphs absent 

Lower Side :

Thin to thick (7-10%), shiny like glass, distinctly transversally and longitudinally cracked at the base of main branches

Medulla :

Compact to dense and often orange pigmented close to the axis, axis: thick 

Present but not numerous, up to 10 mm in diam., mainly terminal to subterminal on terminal branches

Apothecia :

Ellipsoid, 8-10 x 5-6 µm

Ascospores :

Medulla K+ yellow turning red, C-, KC-, P+ orangish yellow Secondary metabolites: norstictic (major) and salazinic (major) and usually galbinic (major) acids, or diffractaic acid (major)

Chemistry :