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1 September 2000 Notes on the Lecanora varia Group in North America
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Abstract
This is a preliminary study of a group of North American taxa of Lecanora occurring on bark and containing usnic or isousnic acid and having a yellow, yellow-green, or greenish thalli. The group is regarded as L. varia s. lato and, based on species examined, a proposal is offered to delimit the following smaller groups: L. varia group s.str.; L. expallens group s. lato with L. strobilina and L. expallens group s.str.; and the L. saligna group. Two new subspecies (L. varia subsp. densa and L. varia subsp. laxa) are described. A key for the taxa studied is presented. Some suggestions for future research are outlined.
Lucyna Śliwa and Clifford M. Wetmore "Notes on the Lecanora varia Group in North America," The Bryologist 103(3), (1 September 2000). https://doi.org/10.1639/0007-2745(2000)103[0475:NOTLVG]2.0.CO;2
Received: 14 October 1998; Accepted: 1 January 2000; Published: 1 September 2000
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