Lichens

Description

Thallus corticolous, crustose, thin, yellowish to greenish yellow, isidiate; isidia simple, rarely branched and coralloid, sometimes thallus appears completely granular due to minute isidia. Apothecia rare, most of the time thallus sterile, apothecia when present round, sessile, 0.3 – 0.5 mm diam.; margin thick, biatorine, paler than the disc, yellow, isidiate; disc yellow-orange, plane to concave. Exciple biatorine, sometimes with algal cells, 55 – 73 µm thick; epihymenium yellowish to golden, K+ pink, 21 – 28 µm thick; hymenium hyaline, inspersed with oil globules, 51 – 64 µm thick; hypothecium hyaline, inspersed, 53 – 92 µm thick; paraphyses, simple to sparingly branched. Ascus 8 spored, clavate; ascospores hyaline, ellipsoid to oblong, transversely 1 septate, locules polaribilocular, 14.5 – 16.5 × 10.6 – 11.0 µm. Chemistry: Thallus K+ yellow purple, C–, KC–, P–. TLC: Parietin present.

Ascomata

Apothecia

Cilia

Absent

Habit

Crustose

Medulla

White

Photobiont

Green alga

Pruina

Absent

Rhizines

Absent

Secondary Metabolites

Parietin

Thallus colour

Yellowish To Greenish Yellow

Spot Test

K+ Yellow Purple/P-/C-/KC-