Identification key
Usnea sp.
(1) Usnea sp.
Description
Thallus
Fruticose, up to 8 cm long, forming cylindrical strips covered with small papillae or tubercules. The determination to the species level requires the use of chemical reagents, microscopic examination, or even molecular analysis.
Fruticose, up to 8 cm long, forming cylindrical strips covered with small papillae or tubercules. The determination to the species level requires the use of chemical reagents, microscopic examination, or even molecular analysis.
Color
Greenish, except the base of the main branches black to light brown
Greenish, except the base of the main branches black to light brown
Reproduction
Apothecia: sometimes present, terminal, white disc, margin lined with radiating cilia
Soralia: sometimes present in some species
Isidia: sometimes present in some species
Apothecia: sometimes present, terminal, white disc, margin lined with radiating cilia
Soralia: sometimes present in some species
Isidia: sometimes present in some species
Risk of confusion
None
None
Ecology
Substrate
On bark or branch
On bark or branch
Habitat
Acidophilous and heliophilous
Acidophilous and heliophilous
Occurrence
Variable
Variable
Sensitivity to air pollution
Very sensitive to nitrogen pollution
Very sensitive to nitrogen pollution
(2)
(3)
legal notice | all rights reserved | © 2024