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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
Relicina abstrusa (Vain.) Hale
  Phytologia 28: 484 (1974)
Parmelia abstrusa Vain., Acta Soc. Fauna Fl. Fenn. 7: 64 (1890). T: Caraça, Minas Gerais, Brazil, E.A.Vainio 1347; lecto: TUR, isolecto: UPS, fide M.E.Hale, Smithsonian Contr. Bot. 26: 17 (1975).
  Thallus foliose, adnate, to 10 cm wide. Lobes contiguous, imbricate, sublinear, dichotomously or subdichotomously branched, 1–2 mm wide, elobulate; cilia dense, moderately inflated, to 2 mm long. Upper surface pale yellow-green to yellow-brown, flat to convex, dull, smooth, weakly maculate; isidia moderately dense, cylindrical, mainly simple, short. Lower surface black; rhizines moderately dense, shiny, simple, black. Apothecia rare, 1–4 mm wide; disc shallowly concave, cinnamon-brown to dark brown; thalline exciple coronate, isidiate, retrorsely rhizinate. Ascospores ellipsoidal to subglobose, 5–6 × 4–5 µm. Pycnidia subspherical, immersed. Conidia bifusiform, 5–6 × 1 µm. CHEMISTRY: cortex K-, UV-; medulla K+ yellow then dark red, C-, P+ deep orange; containing usnic acid, norstictic acid (major), connorstictic acid (trace) and ±hyposalazinic acid (trace).
  Widespread in north Qld on mangroves, trunks and canopy branches of trees in coastal and hinterland rainforests, rarely on rock; also occurs in Japan, Taiwan, SE Asia, Indonesia, Papua New Guinea, Florida (U.S.A.), and Central and South America.  
  Elix (1994v)  

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

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