Cladonia macilenta var. bacillaris (Ach.) Schaer.
Cladonia bacillaris (Ach.) Nyl.
Primary thallus made of persistent squamules, more or less lobate and crenulate, 1-3 mm high, 1 mm wide, upper surface glaucous, pale grey-green slightly blueish, lower surface whitish. Podetia subcylindrical 10-40 mm high, 1-4 mm wide, sinuous, typically coma-shaped, apices thinner or slightly widened, covered with grey-green farinose soredia when moist, grey-yellow when dry, occasionally corticate towards the base. Apothecia at tips of podetia, single, red, 1-2 mm diam.. C-, K-, KC+/- yellow, Pd-. Rare, on old stumps, dead trees, etc. N.B. Assigned as a different species, sub-species, variety or chemotype of Cladonia macilenta var. macilenta according to various authors,*