Cladonia bellidiflora, one of several conspicuous cladonia lichens observed during a recent Northwest Lichenologist foray to a coastal dune ecosystem in Lane County, Oregon.

Physconia americana is a common lichen species along the west coast of North America distinguished within the genus by its lobulate apothecia. Seen here growing on Garry Oak in the hills above Gold Hill, Jackson County Oregon.

Cetraria sphaerosporella is a species unique to Northwest North America where it commonly grows on whitebark pine, as seen here near Sunrise in Washington’s Mt. Rainier National Park.

Umbilicaria polaris a common rock tripe of high peaks in Oregon, seen here on granite near the peak of Mount Ashland along the Siskiyou Crest in Jackson County.

Hypotrachyna sinuosa a widespread species commonly encountered in low elevation riparian forests in the Pacific Northwest, seen here on Oregon ash in a riverside swamp in Lane County, Oregon.

Pannaria oregonensis is a rare species endemic to moist lowland habitats of northwest North America, seen here on Hooker’s willow in a costal dune complex on the central Oregon coast.

Nephroma laevigatum is a conspicuous kidney lichen distinguished by the dark yellow to orange medulla, seen in an Oregon ash swamp near the Row River in Lane County, Oregon.

Niebla homalea is a somewhat common fruticose lichen on seashore rocks in the fog zone of California found from near the San Francisco Bay Area in the north south through Baja, seen here at Duncan Beach State Park in coastal Sonoma County.

Gabura insignis is a unique hypercoastal cyanolichen in the Pacific Northwest distinguished by its wrinkled warty isidiate thallus that greatly expands when wet, seen here in a dry state growing on conifer twigs at the mouth of the Salmon River, Lincoln County Oregon.

Platismatia wheeleri is a common epiphyte of hardwoods in the Mediterranean climate of southwestern Oregon, distinguished among local rag lichens by the sinuous marginal soralia. Seen here on black hawthorn along Babe Creek in the Cascade mountains of Jackson County.

Letharia columbiana is a common endemic wolf lichen in the inland Northwest. It is distinguished by the chartreuse colored thallus from vulpinic acid and the prominent brown apothecia, seen here near Cottonwood Meadow Lake in Fremont-Winema National Forest, Lake County, Oregon.

Pseudocyphellaria rainierensis is a specklebelly lichen restricted to ancient stands of old-growth and endemic to the Pacific Northwest temperate rainforest, seen here along the Ohanapecosh River, Lewis County, Washington.

Parmelina coleae is a epiphytic lichen characteristic of the Mediterranean type climate of the California Floristic Province, seen here growing on an ancient Garry oak at the northern edge of its range at Upper Table Rock in Jackson County, Oregon.

Lobaria linita is a conspicuous lungwort lichen of northern forests in western North America seen here at Memorial Beach on Prince of Wales Island in the Tongass National Forest, Alaska.

Ricasolia amplissima ssp. amplissima occurs only as a dendriscocauloid cyanomorph in southern Oregon, seen here growing on a horizontal branch of an ancient Garry oak in a lichen rich oak savannah near Antelope Creek in the foothills of the Cascade Mountain of Jackson County.

Cetrelia cetrarioides is an uncommon rag lichen living on red alder in low elevation riparian forests in the Pacific Northwest. Distinguished by pseudocyphellae on the upper & lower surfaces & elongate soralia along smooth thallus margins. Seen here along Mill Creek in downtown Turner, Oregon.

Pannaria rubiginosa is an oceanic cyanolichen seen here in a moist state of hydration in an ancient Atlantic hazel woodland at Burren National Park, Corofin, Co. Clare, Ireland

Nephroma tropicum is a commonly encountered kidney lichen in the rainforests of the Pacific Northwest, distinguished among local Nephroma species by the abundant marginal lobules. Seen here along the Nisqually River in the Longmire Springs area of Mount Rainier National Park, Washington.

Tephromela atra var. atra is a conspicuous crustose lichen with a cosmopolitan distribution seen here on coastal rocks at Trá na bhForbacha, Furbo, County Galway, Ireland

Vulpicida canadensis is a lichen endemic to northwestern North America. Quite common in pine forests east of the Cascade Mountains, it is more localized on the westside, such as the specimen seen here on the branch of an open grown shore pine on Cypress Island, Washington.

Dirinaria species, epiphytic on manchineel trunk seen here in a beach front forest at Playa Malpaso, Bahía de Banderas, Nayarit, México

Leucodermia leucomelos is a widespread oceanic species seen here in the subtropical laurisilva forest of Quinta do Santo da Serra, Machico, Madeira

Physcia alnophila is a common hardwood dwelling rosette lichen in the Cascade Mountains, seen here on willow near Frog Creek in Jackson County, Oregon

Protoparmeliopsis pinguis is a regularly encountered species on the central California coast. A fog moistened thallus is seen here growing on granitic rock at the Bodega Marine Reserve in Sonoma County.

Solorina crocea is a unique tripartite arctic-alpine pelt lichen whose orange colored medulla is due to an anthraquinone pigment known as solorinic acid. Seen here on an alpine ridge on the flanks of Tahoma near Sunrise in Mount Rainier National Park, Washington.

Parmotrema cristiferum, a pantropical ruffle lichen seen growing as an epiphyte at Ho’omaluhia Botanical Garden, O’ahu, Hawaii

Ochrolechia upsaliensis is a familiar bryophilous lichen seen here growing over Wallace's spikemoss on an exposed rock outcrop in the upper reaches of the Lake Creek watershed, Jackson County, Oregon

Ricasolia virens is a distinctive lungwort inhabiting ancient woodlands in the Celtic rainforest, seen here near Kintyre, Argyll, Scotland

Lobaria scrobiculata is a distinctly yellowish gray lungwort frequently found on hardwoods in the rainforests of the Pacific Northwest, seen here on a large old vine maple on a ridge above the McKenzie River in the Willamette National Forest, Oregon

Dermatocarpon miniatum a widespread stippleback lichen seen growing on moist stone walls of Aughnanure Castle near Knockillaree, County Galway, Ireland

Star-shaped apothecia of Umbilicaria phaea, a common species of exposed rock in Northern California, seen here on cliffs above Scotch Creek in Siskiyou County.

Roccella tuberculata one of several litmus lichens found on the Macaronesian islands, seen here on volcanic rock at Ponta de São Lourenço, Madeira, Portugal

Parmotrema perforatum is a common ruffle lichen of the southeastern woodlands, one of several Parmotrema species seen in litterfall after a spring tornado near Stanford Indiana.

Lobaria anomala is a commonly encountered specklebelly in the Pacific Northwest, one of several endemic species that characterize lush Lobarion lichen communities in the cool temperate forests of the region. Seen here growing on vine maple in the Willamette National Forest near Cascadia, Oregon.

Peltula euploca is a cosmopolitan lichen distinguished by its peltate habit and Chroococcidiopsis photobiont, an extremophile cyanobacteria that is known for its desiccation tolerance. Seen here growing on Pompadour Bluff near Ashland, Oregon.

Rusavskia elegans is a widespread rock dwelling sunburst lichen, that often grows on anthropogenic substrates. It’s seen here growing on the monument to Sigriõur Tómasdóttir whose activism led to the protection of Gollfoss waterfall in southwestern Iceland.

Cladidium bolanderi is a unique fruticose lichen of coastal rocks in Northern California and Oregon. The distinctive spotted surface is due to the clustered nature of the chlorococcoid algae within. Seen here at Horseshoe Cove at the Bodega Marine Reserve in Sonoma County.

Hypogymnia duplicata is a luxurious tube lichen endemic to cool moist coastal forests in northwestern North America, seen here growing on shore pine in a peat bog near Neck Lake, Prince of Wales Island, Alaska.

Crocodia aurata is a widespread oceanic-subtropical specklebelly whose vivid yellow medulla and soralia are due to pulvinic acid, seen here at Quinta do Santo da Serra, Madeira.

Peltigera hydrothyria var. aquatica, a unique pelt species that grows underwater in cool mountain streams in the Pacific Northwest. This photo was taken at a low water time that momentarily exposed it to the air, along the banks of Opal Creek in the Willamette National Forest, Marion County,Oregon.

Variospora flavescens, a common saxicolous fire dot lichen with a distinctly bicolored thallus growing on a cement wall in Sintra, Portugal

Lepidocollema marianum, a common Hawaiian pannarioid lichen seen at Hoʻomaluhia Botanical Garden, Oʻahu

Umbilicaria nodulospora featuring distinctly gyrose apothecia, residing on a vertical basalt rock face in Lava Beds National Monument, California

Polycauliona phryganitis is a rare lichen endemic to areas with regular marine fog along the Central California coast, seen here growing on rock at Bodega Head in Sonoma County.

Lathagrium auriforme is a widespread limestone loving jelly lichen distinguished by its abundant globose isidia, seen here inhabiting a roadside rock wall along the shore of Lough Corrib near Oughterard, Ireland

Polycauliona coralloides is a halophilic lichen found on intertidal rock along the west coast of North America, seen here at Fort Ross State Historic Park, Sonoma County, California.

Umbilicaria phaea var. coccinea, a uniquely pigmented rock tripe seen here on basalt cliffs at Horseshoe Ranch Wildlife Area, Siskiyou County, California.

Sticta canariensis is a rare species throughout its range, the bright green chloromorph is seen here lushly growing as an epiphyte on Laurus novocanariensis in a moist upper elevation laurisilva forest in Madeira, Portugal.

Usnea rubicunda is distinguished within the genus in the Pacific Northwest by its unique reddish orange color. Widespread in the tropics this species is uncommon further north, in Oregon it is confined to moist coastal forests. Seen here at Cape Lookout State Park in Tillamook County.

Ramalina menziesii, is a species endemic to the west coast of North America. It is easily distinguished by its unique netted pattern, seen here luxuriantly growing as an epiphyte on an ancient Garry oak in the Willamette Valley in northern Oregon.