Lichens

Description

Thallus saxicolous, crustose, thin, rimose areolate, whitish grey to grey, coalescing with neighbouring thallus and spreading in to large area, sorediate; soralia pustulate, mostly laminal, white, fine granular. Apothecia few, scattered, sessile, round, 0.2 – 0.5 mm diam.; margin smooth, lecidine, dark brown to black; disc orange to orange brown, plane to slightly convex. Exciple darker towards cortex, hyaline or paler towards inwards, algal cell absent, 35 – 50 µm thick; epihymenium yellow brown to brown, 7 – 15 µm thick, K+ purple; hymenium hyaline, 28 – 42 µm thick; hypothecium hyaline, 25 – 35 µm thick; paraphyses simple to furcated, apical cells swollen. Asci 8 spored, clavate, 33 – 42 × 12 – 17 µm; ascospores hyaline, polaribilocular, narrowly ellipsoid, 6.1 – 12.3 × 4.2 – 5.1 µm. Chemistry: Thallus K+ yellow, C–, KC–, P–. TLC: Atranorin present.

Ascomata

Apothecia

Cilia

Absent

Habit

Crustose

Medulla

White

Photobiont

Green alga

Pruina

Absent

Rhizines

Absent

Secondary Metabolites

Atranorin

Spot Test

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

Thallus colour

Whitish Grey to Grey