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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
Letrouitia leprolyta (Nyl.) Hafellner

Nova Hedwigia 35: 693 (1983)

Lecanora leprolyta Nyl., Flora 65: 489 (1882).

T: Calcutta, India, on trees, 1866, S.Kurz 159; holo: H-NYL n.v.; iso: BM, G, H, W n.v., M.

  Thallus yellow-grey to grey-brown or pale orange, thin, isidiate; soredia absent. Isidia concolorous with the thallus, spreading over the surface, short, simple, wart-like or erumpent. Apothecia very rare, ±rounded or distorted, sessile, constricted at the base, 0.4–1.3 mm wide; disc orange-brown to dark red-brown or bluish black, ±plane; margin prominent, ±raised above the disc, smooth, yellow to orange; disc and margin K+ purple; proper exciple consisting of radiating hyaline agglutinated hyphae, the outer layer encrusted with anthraquinone crystals, colourless within. Epihymenium dark brown, with anthraquinone crystals. Hymenium not inspersed, colourless, 80–100 μm thick; hypothecium pale brown. Asci 8-spored when immature, often with fewer than 8 ascospores at maturity, 60–80 × 14–19 μm. Ascospores ellipsoidal, transversely septate, with 6–8 lens-shaped locules, 19–30 × 7–14 μm. Conidia not seen.
CHEMISTRY: Thallus and apothecia K+ purple; both containing fragilin (major), parietin (minor), 7-chloroemodin (minor), 7-chloroparietinic acid (minor), 7-chlorofallacinal (minor), 7-chloroteloschistin (minor), ±exuviatic acid B (minor), ±emodin (trace), ±fragilin bisanthrone (trace), ±physcoin bisanthrone (trace).
  Rather common in the N.T., eastern Qld and N.S.W.; grows on bark in warm-temperate, subtropical and tropical forest. Also in Africa, Asia and Papua New Guinea.  
  Elix (2009k)  

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

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