| Author | Wolseley, P., James, P. & Alexander, D. |
| Year | 2002 |
| Title | Key to Lichens on Twigs |
| Type | Leaflet |
| Review (by Malcolm Storey) | Fold out leaflet of 8 A4 pages colour printed on shiny card. Identification is by means of a three tables, one each for crustose, foliose and fruticose species, followed by good colour photographs of the species with diagnostic features briefly decribed. Well-chosen icons are used to indicate hand lens needed, clean air, nitrogen tolerant, acid tolerant, and chemical tests. The Natural History Museum has an online web-site in conjunction with this guide which provides an online version with close-up pictures. |
| Examine |  with x8 or x10 hand lens |
| Identification difficulty | Lichens on twigs are the easiest group of lichens to identify and this guide should enable even the beginner to make good progress. |
| Website url | www.nhm.ac.uk/jdsml/nature-online/lichen-id-guide/ |
