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Australian Biological Resources Study

Checklist of the Lichens of Australia and its Island Territories
Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References
Karoowia ralla (Brusse) Hale
  Mycotaxon 35: 189 (1989)
Parmelia ralla Brusse, Mycotaxon 27: 240 (1986). T: Grid 3321 AD, Seweweekspoort, Swartberg Range, Cape Province, South Africa, 10 Feb. 1986, F.A.Brusse 4935; holo: PRE; iso: BM, COLO, LD, MEL, US.
  Thallus ±dispersed, with lobate centre or becoming weakly areolate, to 2–4 cm wide. Lobes contiguous, flat, subirregular, rather short and irregularly branched, 0.2–0.5 mm wide, minutely lobulate along margins. Upper surface pale yellowish green, shiny to dull, pruinose at lobe apices, without soredia and isidia. Lower surface pale brown with a well developed spongy layer of rhizohyphae and poorly developed lamella-like loose aggregations of rhizohyphae. Apothecia initially aspicilioid, mostly emergent and sessile at maturity, 0.3–0.5 mm wide. Ascospores 10–14 × 5–6 µm. Pycnidia common. Conidia 9–11 × 1 µm. CHEMISTRY: cortex K-, UV-; medulla K-, C-, KC+ purple, P-; containing norlobaridone and usnic acid.
  Very rare in S.A. Widespread in South Africa.  
  Elix (1994j)  

Checklist Index
Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References

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