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 flava (Müll.Arg.) C.W.Dodge | ||
Beih. Nova Hedwigia 38: 181 (1971) Physcia flava Müll.Arg., Hedwigia 31: 277 (1892). T: NW of Red Hill, Ascension Island, 900 m, on rocks, July 1889, H.J.Gordon 90; lecto: BM, fide D.D.Awasthi, Biblioth. Lichenol. 2: 87 (1975); isolecto: G n.v. |
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| Thallus 2–6 cm wide, adnate to tightly adnate, pinnately to subdichotomously lobate. Lobes radiating, contiguous, becoming verrucose to subcrustose in the centre, plane to convex,
0.5–1.5 mm wide; apices discrete. Upper surface yellow to pale yellow-brown, tinged grey or blue-grey at the apices, delicately pruinose, sorediate; dactyls absent. Soralia laminal, globose to capitate, 0.2–0.3 mm wide, rarely erose and crateriform; soredia granular to, rarely, farinose. Medulla pale yellow to yellow. Lower surface brown-black. Apothecia very rare, sessile, 0.4–0.7 mm wide; disc dark brown to brown-black, epruinose. Epihymenium pale brown, c. 8 μm thick. Hymenium colourless, 65–75 μm thick. Hypothecium dark brown, 90–125 μm thick, lentiform. Ascospores 10–15 × 4–7 μm. Pycnidia not seen. CHEMISTRY: Cortex K+ yellow, C+ orange-red, KC+ red, P–; medulla K–, C–, KC–, P–; containing atranorin (minor), chloroatranorin (minor), divaricatic acid (major), arthothelin (major), 4,5-dichloronorlichexanthone (minor), 3β-acetoxyhopane-1β,22-diol (minor),±unknown terpenes (minor). |
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| Occurs on bark and rocks in coastal and montane forests in Qld and eastern N.S.W. Also in Africa and on Ascension Island (South Atlantic Ocean). | ||
| Elix (2009l) | ||
| Checklist Index |
| Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References |
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