Usnea in Europe

	Key to the Usnea species in Europe
	Identification key of 31 species, maximum length – 37 steps

	select one of the choices
	Base conspicuously blackened; fibrils present; contains salazinic acid (as a main substance)
	Base pale; fibrils absent or scarse; contains protocetraric acid or rarely thamnolic acid (as a main substance)

	current step: 31; previous step: 30 go back

	start again other keys

	Species in the key articulata \| barbata \| cavernosa \| ceratina \| chaetophora \| cornuta \| dasaea \| dasypoga \| diplotypus \| esperantiana \| flammea \| flavocardia \| florida \| fragilescens \| fulvoreagens \| glabrata \| glabrescens \| hirta \| intermedia \| lapponica \| longissima \| mutabilis \| praetervisa \| rubicunda \| schadenbergiana \| silesiaca \| subcornuta \| subfloridana \| subscabrosa \| substerilis \| wasmuthii