Department of Botany,
Bharathiar University, Coimbatore - 641 046
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 :
