Rhizocarpon vorax
- Innhold
- Morphology
- Chemistry
- Habitat
- Comment
Morphology
Thallus continuous to areolate, up to 2 cm diam., parasitic on the thallus of Pertusaria spp., greyish brown, dull; hypothallus indistinct; medulla KI– or faintly violet. – Apothecia up to 0.8 mm diam., black, epruinose, orbicular or sometimes confluent, weakly to strongly convex, immarginate; excipulum brownish black in the rim, dark brown in inner part, K+ red; hypothecium dark brown, K–; hymenium pale reddish brown; epihymenium dark reddish brown, K+ red; no crystals in the apothecia, hymenium inspersed with dark violet granules; ascospores 8 per ascus, eumuriform, dark green to dark brown, 25–34 × 15–20 µm. – Conidiomata not seen.
Chemistry
Not examined.
Habitat
Growing on the thallus of Pertusaria spp. on calcareous schist.
Comment
The species is easily recognized by the brown thallus growing on Pertusaria species.