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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
Dirinaria picta (Sw.) Schaer. ex Clem.

Gen. Fungi 323 (1931)

Lichen pictus Sw., Nova Gen. Sp. Pl. 146 (1788); — Parmelia picta (Sw.) Ach., Methodus 211 (1803); — Physcia picta (Sw.) Nyl., Mém. Soc. Sci. Nat. Cherbourg 3: 175 (1855); — Pyxine picta (Sw.) Tuck., Syn. N. Amer. Lich. 1: 79 (1882).

T: India Occidentalis, Jamaica, Swartz; lecto: S, Herb. Swartz ex Herb. Thunberg 26168 n.v., fide D.D.Awasthi, Biblioth. Lichenol. 2: 73 (1975); isolecto: UPS n.v.

Parmelia plumosa Taylor, J. Bot. (Hooker) 6: 173 (1847). T: Low Island, [near Tahiti, Society Islands], on bark, Beechy; lecto: FH-TAYL n.v., fide D.D.Awasthi, loc. cit.; isolecto: BM, H-NYL 31803 n.v.

  Thallus 2–8 cm wide, adnate to tightly adnate, pinnately to subpinnately lobate. Lobes radiating, contiguous, not longitudinally plicate, plane to convex, but ±weakly concave near apices, 0.5–1.0 mm wide; apices discrete. Upper surface grey, bluish grey to yellow-grey or off-white, epruinose or very weakly pruinose, sorediate; dactyls absent. Soralia laminal, globose, ±capitate, 0.5–1.0 mm wide; soredia farinose. Medulla mostly white; lower medulla rarely yellow near the lobe tips. Lower surface black in the centre, paler towards the lobe tips. Apothecia rare, sessile to ±constricted at the base, 0.6–1.3 mm wide; disc black, epruinose. Epihymenium pale brown, 8–10 μm thick. Hymenium colourless, 80–90 μm thick. Hypothecium red-brown to brown-black, 120–200 μm thick, lentiform. Ascospores 12–21 × 5–9 μm. Conidia bacilliform to fusiform, 3–4 × 0.9–1.1 μm.
CHEMISTRY: Cortex K+ yellow, C–, KC–, P+ yellow; medulla K–, C–, KC–, P–; containing atranorin (minor), chloroatranorin (minor), divaricatic acid (major), 3β-acetoxyhopane-1β,22-diol (minor),±unknown terpenes (minor).
  In Australia this pantropical-subtropical species often extends into temperate regions; occurs on bark, wood and rocks from coastal areas to montane forest in W.A., N.T., Qld and N.S.W. Also on Christmas and Norfolk Islands, North, Central and South America, Asia, Africa and many Pacific islands.  
  Elix (2009l)  

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

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