Usnea in Baltic countries

	Key to the Usnea species in the Baltic countries
	Identification key of 16 species, maximum length – 17 steps

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	Branches of uneven thickness, irregularly swollen, apical parts often sinuous; soralia punctiform and usually not expanding, bearing relatively tall isidiomorphs; contains salazinic acid
	Branches of even thickness, slendering towards the apices, not swollen or sinuous; soralia punctiform to expanded, bearing relatively small isidiomorphs; contains squamatic or thamnolic acid

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	Species in the key articulata \| barbata \| ceratina \| chaetophora \| dasypoga \| diplotypus \| florida \| fulvoreagens \| glabrata \| glabrescens \| hirta \| lapponica \| longissima \| subfloridana \| substerilis \| wasmuthii