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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
Ramboldia crassithallina Kalb

Biblioth. Lichenol. 78: 160 (2001)

T: Gorge Rock, c. 24 km SE of Corrigin, W.A., 32°25’S, 118°00’E, alt. 300 m, on decorticated twigs of shrubs, 18 Aug. 1994, K. & A.Kalb s.n.; holo: CANB; iso: Herb. Kalb.

  Thallus pale yellow to pale tan, bullate-areolate; areolae confluent, 0.2–0.5 mm wide, 0.2–0.5 mm thick; soredia and isidia absent. Photobiont cells 9–15 µm wide. Apothecia round, 0.3–0.5 mm wide, sessile; disc jet-black, glossy, plane, then undulate and convex; margin thin, black and glossy, persistent or becoming excluded in old apothecia. Exciple chocolate-brown. Epihymenium 8–10 µm thick, chocolate-brown, K+ olive-grey. Hymenium 40–50 µm thick, colourless to pale yellow-brown, K–. Hypothecium 100–150 µm thick, colourless to pale brown, K–; subhypothecium colourless, K+ intense yellow. Paraphyses conglutinated, sparingly branched and anastomosing, 1.5–3.0 µm thick, regularly tapered, inspersed with minute brownish granules that dissolve in K; apices colourless, not swollen. Asci 25–35 × 9–12 µm. Ascospores narrowly ellipsoidal to fusiform, 10–14 × 3–4 µm. Pycnidia not seen.
CHEMISTRY: Thallus and subhypothecium, K+ intense yellow; containing thamnolic acid.
  Endemic to lowland sclerophyll forests of W.A., S.A., Qld, A.C.T. and Tas.; grows on shrubs and decorticated wood.  
  Elix (2009e)  

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