... Umbilicaria havaasii D LICHEN Umbilicaria polyrhiza D Umbilicaria vellea D LICHEN Arctic alpine tundra to subalpine rocky ridges , exposed or somewhat sheltered by surrounding rock . Drainage in non - vegetated exposed ridgecrest ...
... Umbilicaria havaasii Llano . Rare . On outcrops , boulders , and rubble in an Alnus sp . – Betula glan- dulosa community at 335 m , a Betula glandulosa Salix fen at 1130 m and in alpine tundra with krummholz at 1220 m elevation . PR ...
... Umbilicaria havaasii 7b Upper surface more or less segmented ( ) , but never distinctly ridged , white- pruinose or rhizinate ; lower surface pale to dark , but never sooty black ( i.e. , thalloconidia absent ) ; apothecia common ...
... Umbilicaria havaasii LLANO In both areas the species was found at almost all stations , but as a rule it was quite rare , especially at the continental stations . The majority of the collections are from the lowlands . The species has ...
... Umbilicaria havaasii Llano [ × 1 ] Thallus areolate , dark grey to brown , but clayey whitish - grey above the umbilicus , often lacerated towards the margin . Underside light in the centre , becoming pruinose grey or sooty towards the ...