| The crottle lichen, the color of winter heather, used to be especially prized. |
| In 1980, an old ash tree in Cumbria on which this lichen grew, had to be felled for safety reasons. |
| On our moss-covered trails, mats of shrubby gray reindeer lichen and Iceland lichen are common. |
| Because of their sedentary character and free grazing habit, reindeer tend to trample and overgraze lichen pastures during summer and autumn. |
| The white buccal lesions of oral lichen planus may necessitate biopsy to exclude leukoplakia, candidiasis, and secondary syphilis. |
| In the interim, Veikko, with the help of only lichen and cold water, has ingeniously made his escape from his Promethean securement. |
