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 purpurascens (Vain.) B.J.Moore | ||
Bryologist 71: 251 (1968) Physcia purpurascens Vain., Ann. Acad. Soc. Fenn.,ser. A, 6: 68 (1915). T: Fair Plane, St Croix, West Indies, on bark, 1906, Boergesen 235; lecto: FH n.v., fide D.D.Awasthi, Biblioth. Lichenol. 2: 45 (1975). |
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| Thallus 2–8 cm wide, adnate to tightly adnate, pinnately to subpinnately lobate. Lobes radiating, contiguous to discrete, ±weakly plicate, plane to weakly convex, 0.2–0.7 mm wide; apices flabellate or truncate and ±discrete. Upper surface white to grey, greenish grey, or yellow-grey, usually finely white-pruinose; soredia and dactyls absent. Medulla predominantly white; lower medulla rarely orange towards the lobe tips. Lower surface black in the centre, brown towards the periphery. Apothecia common, crowded centrally, sessile to constricted at the base, 0.5–1.5 mm wide; disc black, purple-pruinose, pruina ±evanescent with age. Epihymenium pale red, c. 10 μm thick. Hymenium colourless, 80–90 μm thick. Hypothecium dark brown to brown-black, 70–80 μm thick, lentiform. Ascospores 11–20 ×
5–7 μm. Conidia bacilliform, 4–5 × c. 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). |
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| This tropical-subtropical species occurs on bark, wood and rocks in hinterland forest and woodland in eastern Qld and N.S.W. Also in Africa and North, Central and South America. | ||
| Elix (2009l) | ||
| Checklist Index |
| Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References |
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