This list has been developed (since 2000) by Rod Tulloss.  Locally available literature is limited as are chemical reagents so important to the study of lichens. Nomenclatural and taxonomic corrections are very welcome.

Last modified: 19 February 2001

[Stratified Foliose Lichens]

S1Pyxine sorediata on bark of Sweetgum - magnified!S2Parmotrema ?dilatatumS3Parmotrema ?dilatatum - showing marginal ciliaS4Parmelia sulcata - note faint reticulation and white markings
S5Heterodermia hypoleuca S6Physcia millegrana - with apotheciaS7Parmotrema citrinum showing clusters of branching isidia
S8Pseudoparmelia caperata

Flavoparmelia caperata (L.) Hale [image S8]

Heterodermia hypoleuca (Muhl.) Trev. [image S5]

Parmelia sulcata Tayl. [image S4]

Parmotrema crinitum (Ach.) M. Choisy [image S7 (note crowded isidia)]

Parmotrema cf. dilatatum (Vain.) Hale [images S2, S3 (note black cilia)]

Physcia millegrana Degel. [image S6]

Pyxine sorediata (Ach.) Mont. [image S1]

[Fruticose Lichens]

F1Cladonia cristatellaF2Cladonia polycarpoidesF3Cladonia cf chlorophaea
F4Cladonia pyxidata - cup proliferating at margin

Cladonia cf. chlorophaea (Flörke ex Sommerf.) Sprengel [image F3]

Cladonia cristatella Tuck. [British Soldiers] [image F1]

Cladonia polycarpoides Nyl. [image F2]

Cladonia pyxidata (L.) Hoffm. [image F4]


A cumulative checklist for the lichen-forming, lichenicolous and allied fungi of the continental United States and Canada. URL:

Hale, M. E. 1979. How to know the lichens, 2nd ed. (Wm. C. Brown Co., Dubuque). viii_246 pp.

Maintained by R. E. Tulloss.
Copyright 2000, 2001 by Fund for Roosevelt, Inc.