Black Lichen: Lichina pygmaea - Photograph and information on this maritime species and a map showing its distribution in Britain.
Black Shields: Tephromela atra - Photograph and information on this species with a map showing its distribution in Britain.
Caloplaca coralloides - Research project by Megan Kelso provides photographs and plenty of information on this lichen which can be found living on rocks close to the sea.
Catalog of California Lichens - 1575 species have been identified from this state, the great geographic diversity being responsible for the relatively large number of lichens found.
Cetraria islandica - Photograph and information on this lichen which has been used as a food in time of famine.
Cetraria islandica: Iceland Moss - Information on the edible, medicinal and other uses of this lichen from the Plants for a Future database.
FIA Lichen Indicator - The Forest Inventory and Analysis service in the United States monitors the lichen community in order to assess the impact of air pollution on forest health.
Growth and Development in Lichens - Each species of lichen has its own preferred substrate. This article describes how and where they grow and the extremes of climate that they can tolerate.
Introduction to Lichens - A lichen is a combination of two organisms which live together intimately. Information on their fossil record, life history and ecology, systematics and morphology.
Letharia vulpina - Photograph of Wolf Lichen which in the past was put to many uses by the indigenous peoples in North America.
LIAS - Provides a global information system for lichenized and non-lichenized ascomycetes.
Lichen Images - Provides photographs of about 50 species.
A Lichen in Close-up - Images of a lichen at three different magnifications, the most detailed showing the algal and fungal components.
Lichen Pictures - Photographs of Acolium hawaiiense, Acroscyphus sphaerophoroides, Anaptychia leucomelos, Bacidia medialis, Bryoria furcellata, B. smithii, Buellia aeruginascens, B. proximata, B. pruinosa, B. tincta, Caloplaca erythrantha and Teloschistes flavicans.
Lichenland - Offers ways to find out more about lichens including Lichenlite, an introduction for children. For more advanced study there is a synoptic key and an identification aid.
Lichens - An illustrated introduction to the lichens with information on their ecology and reproduction.
Lichens - Photographs of several species of lichen growing in their natural habitat in Hawaii.
Lichens as Bioindicators of Air Pollution - Technical article discussing how lichens play prominent roles in air pollution studies because of their sensitivity to different gaseous pollutants, particularly sulfur dioxide.
Lichens: Dual Organisms - Twenty four photographs ranging from lichen covered rock faces, through individual species to magnified sections, published in a pictorial supplement to the Fifth Kingdom.
Lichens of North America - Details of the book of this name, and an interesting introduction to the biology of lichens and their relationships with man and the environment.
Life on the Rocks - A peep into the world of lichens by Paul James with photographs of a number of species growing in Wales.
MarLIN Image Gallery - Photographs of a number of species of lichen often found growing close to the sea.
Niebla and Vermilacinia Communities - Photographs and information on the lichens in the Ramalinaceae family found in California and Baja California.
Reproduction and Reproductive Structures - Outline with diagrams of the two fundamentally different sorts of reproductive bodies possessed by lichens, and the three main types of vegetative reproduction where pieces of lichen detach.
Sea Ivory: Ramalina siliquosa - Photograph and information on this maritime species and a map showing its distribution in Britain.
Tar Lichen: Verrucaria maura - Photograph and information on this maritime species with a map showing its distribution round the coasts of Britain.
Verrucaria mucosa - Photograph and information on this maritime species and a map showing its distribution in Britain.
Walton Hall Nature Trail - Take a walk through the churchyard to see what lichens grow on the different man-made outcrops of stone.
The World of Lichenology - Information on the International Association of Lichenologists, photographs of various lichens and links to other lichen-related websites.