Anaptychia palmulata (aka “Shaggy-fringe Lichen”)
Substrate: On bark of hardwoods & white cedar or on shaded rocks.
Habitat: In Forests.
Color: Thallus greenish gray to brownish, often coarsely white scabrose on the lobe tips. Lower surface pale.
Shape: Flat to acending at the margins, forming rosettes 4 – 8 cm across; lobes rather elongate, often fan-like at the tips. The margins covered with tiny, strap-shaped lobules but few cilia. Underside with pale, unbranched rhizines that later become squarrose or brush-like.
Size: 0.7 – 1.5 (-2) mm wide
Apothecia: Common, 1-2 mm in diameter, with dark brown, nonpruinose disks & thick, prominent margins that sometimes develop small lobules.
Lookalikes: Physconia subpallida, an eastern lichen growing in similar habitats, also has a lobulate thallus, but the rhizines are black & squarrose when mature, the apothecia are pruinose; & the spores have unevenly thickened walls (Physcia-type). Physconia americana is the western equivolent. Melanelia panniformis is a saxicolous species with a black lower surface that typically produces masses of overlapping lobules on the central part of the thallus. A rare lobulate Anaptychia, A. bryorum, grows on tundra soil & vegetation. It is dark brown with some cilia along the lob margins, & the lobules are extremely narrow & frequently forked.
Bibliography: Lichens of North America, by Brodo, Sharnoff, & Sharnoff
Database Entry: Distance Everheart 12-26-13