Collector
Krog,H. & Santesson,R. 29074 Moberg, Lichenes selecti exsiccati Upsaliense 17
Label
Costa Rica, Cartago prov., 13km SE of Cartago, 2.5km SE of Orosi near the bridge over Rio Grande de Orosi.
Alt. 1150 m
Annotations
GZU Inv.-Nr. 33-87
Species haec a P. coralligera Malme differt soraliis laminalibus sine dactylis, et xanthono medullari.
Thallus saxicolous, loosely adnate. Lobes pale to dark grey above, plane distally, slightly convex centrally, weakly to distinctly maculate, lobe ends pruinose. Soralia laminal, orbicular, convex, with coarsely granular, white to grey soredia. Medulla stramineous to pale ochraceous. Underside black, rhizinae black, simple, some with frayed, white tipped ends. Aopthecia not seen. Chemistry: cortex; atranorin (UV-), medulla; triterpenoids similar to those of P. coralligera, xanthone (UV+ yellow).-H.K. & R.S.
holotype in O