Lasallia
Lasallia Mérat, 1821
| Common name | Toadskin Lichens |
|---|---|
| Field Characters | Large, foliose umbilicate chlorolichens (attached by a central holdfast called an umbilicus). Thalli composed of undivided lobes. Blister-like pustules on the upper surface, each with a corresponding depression on the lower surface. Lower surface lacking rhizines, may be smooth, rough like sand paper or papillate. |
| Similar species & genera |
Umbilicaria: may be pustulose, but pustules do not correspond to depressions on lower surface; spores are different as well if you have a fertile specimens and are in doubt. |
| Ecology | In the shield region on non-calcareous rock. |
| Chemistry | |
| Molecular support |
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| Links |
Species recorded in Alberta: 1. Reports of Lasallia papulosa in Alberta require confirmation.
- L. pensylvanica (Hoffm.) Llano, 1950
DICHOTOMOUS KEY – click here for Umbilicate Lichens Key
Resources
Brodo, I. M. 2016. Keys to the lichens of North America. Revised and Expanded. Yale University Press, in collaboration with the Canadian Museum of Nature.
Brodo, I. M., S. D. Sharnoff, and S. Sharnoff. 2001. Lichens of North America. Yale University Press, New Haven and London.
