Additions to the Lichen Flora of Nebraska

Recent field work and literature records have documented 99 species of lichens and three lichenicolous fungi new to Nebraska. The genera Acrocordia, Bispora, Canomaculina, Catillaria, Cladina, Leproloma, Lichinella, Megaspora, Muellerella, Placynthiella, Polysporina, Pseudevernia, Stigmidium, Strigula, and Vulpicida also represent first reports for the state. These records are summarized here along with information about their distribution within the state, substrate affinities, and relevant data regarding taxonomy and chemical composition of selected species. New species records for Nebraska lichens and lichenicolous fungi since the 1995 Nebraska lichen catalog by Egan et al. are also included. Keys are provided for the Nebraska species of the lichen genera Candelariella, Physconia, Punctelia, and Xanthoria. t t t and Douglas Ladd The Nature Conservancy 2800 S. Brentwood St. Louis, Missouri 63114-2712 are deposited at MIN unless otherwise indicated. For each of the following species accounts, specimens are listed by county (Fig. 1), with the counties listed alphabetically. Reports for eleven lichens and lichenicolous fungi are based on Nebraska records published since the comprehensive catalog of Egan et al. (1995). Nomenclature follows the most recent North American lichen checklist published on the World Wide Web (Esslinger 2001). Brodo et al. (2001) recently mapped Nebraska distributions for some of these taxa, but no localities or specimens have been cited in the literature. These very recent "map records" are indicated by an asterisk (*). Acarospora stap/iana (Mull. Arg.) Hue This lichen is parasitic on saxicolous Caloplaca in exposed, usually arid, habitats. The host is typically Caloplaca trachyphylla (Tuck.) Zahlbr., a species ofthe western interior United States and adjacent Canada that has a bright orange, lobate thallus. SCOTTS BLUFF County: Scotts Bluff National Monument, on rock, Wetmore 77443, 77447, 77473, 77557, 77571, 77624, 77661, 77697, 77889; SIOUX: Agate Fossil Beds National Monument, on rock, Wetmore 77762, 77782, 77827, 77849, 77874,77889,77897,77942,77960; 13 miles N of Mitchell, on rock, Wetmore 77757. Field work in Nebraska over the last few years and recent literature reports have documented 99 species of lichen -forming fungi previously unreported for the state in Egan et al. (1995). Most ofthese collections are from the Niobrara River Valley area (by Ladd, Egan, Morgan), the ponderosa pine forests of northern and western Nebraska (by Morgan, Egan), and from Scotts Bluff National Monument and Agate Fossil Beds National Monument (by Wetmore). Additional collections (by Morgan, Egan) were made in Nebraska's two planted pine forests, the Samuel R. McKelvie National Forest in Cherry County and the Bessey Division of the N ebraska National Forest in Thomas County. Specimens collected by Morgan and Egan are deposited at the herbarium of the University of Nebraska at Omaha (OMA), those of Wetmore at the University of Minnesota (MIN), and Ladd's collections are to be deposited at the herbarium of the New York Botanical Garden (NY). Specimens cited in this paper collected by Kiener Acarospora strigata (Nyl.) Jatta 1 Nebraska is at the eastern edge of the range of this western interior species that usually occurs on exposed calcareous rocks. GARDEN County: Ash Hollow State Historical Park, on exposed limestone, Ladd 18079; KEY A P AHA: Niobrara Valley Preserve, on caliche blocks, Ladd 16440; SCOTTS BLUFF: Scotts Bluff National Monument, on rock, Wetmore 77457, 77471, 77527, 77533, 77552, 77567, 77568, 77610, 77660, ~eya pah:... ~i'-''''''--''' Knox ~ Cedar Dixon Rock Hon