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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
Diorygma hololeucum (Mont.) Kalb, Staiger & Elix

Symb. Bot. Upsal. 34(1): 155 (2004)

Graphis hololeuca Mont., in F.A.W.Miquel, Pl. Junghuhn. 4: 473 (1855); — Graphina hololeuca (Mont.) Müll.Arg., Flora 65: 386 (1882).

T: Java, [Indonesia], locality unknown, Junghuhn ex Herb. Buse; lecto: L n.v., fide K.Kalb, B.Staiger & J.A.Elix, loc. cit.

  Thallus off-white to pale greenish white, smooth, slightly glossy. Ascomata conspicuous, numerous, sessile, white, straight, curved or sinuous, sometimes branched, 2–8 mm long, 0.5–1.0 mm wide. Proper exciple non-carbonised; thalline margin conspicuous; disc smooth, white-pruinose, exposing the black epihymenium when abraded. Hymenium 200–250 µm thick, I+ pale blue at the margin. Ascospores 1 (–2) per ascus, muriform, 130–160 × 30–36 µm, I+ blue.
CHEMISTRY: Protocetraric acid.
  This corticolous species is known from one locality in north-eastern Qld; also in the Philippines, Papua New Guinea, Malaysia and Indonesia.  
  Archer (2009a)  

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

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