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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
Pyxine sorediata (Ach.) Mont.

in R. de la Sagra, Hist. Phys. Cuba, Bot. Pl. Cell. 2: 188 (1842)

Lecidea sorediata Ach., Syn. Meth. Lich. 54 (1814).

T: in America septentrionale, Mühlenberg; lecto: H-ACH 378 n.v., fide R.Moberg, Symb. Bot. Upsal. 34(1): 287 (2004); isolecto: S, UPS n.v.

Physcia glaucovirescens Nyl., Syn. Meth. Lich. 1(2): 419 (1860); Pyxine glaucovirescens (Nyl.) Aptroot, Cryptogamie, Bryol. Lichénol. 9: 146 (1988). T: Morton [Moreton] Bay, [Qld], Verreaux 1846; lecto: PC n.v., fide A.Aptroot, loc. cit.; isolecto: H.

  Thallus 3–8 cm wide, adnate to loosely adnate, subdichotomously lobate. Lobes radiating, contiguous to imbricate, plane to slightly concave, 0.6–1.3 mm wide, subrotund at the apices. Upper surface yellowish grey to brownish grey, lead-grey or blue-grey, distinctly pruinose; pruina punctiform towards lobe apices; dactyls and isidia absent. Pseudocyphellae distinct at the margins, often grey-pruinose and becoming reticulate. Soralia initially marginal, developing from fissures, then laminal and orbicular, occasionally becoming corticate and developing into pseudoisidia; soredia granular, dirty white or grey. Medulla lemon-yellow above; lower part yellow-brown or yellow-orange. Lower surface black in the centre, paler towards the margin; rhizines ±dense, black to blue-black, furcate. Apothecia very rare, obscurascens-type, 0.5–1.4 mm wide; disc epruinose. Internal stipe distinct; upper part dark orange, K+ red, P–; lower part whitish, K–, P–. Ascospores 14–19 × 6–8 μm. Conidia bacilliform, 3–4 × c. 1 μm.
CHEMISTRY: Cortex K+ yellow or K–, C–, KC–, P+ pale yellow or P–, UV–; medulla K–, C–, P–; containing atranorin (minor or, usually, trace), chloroatranorin (trace), unknown terpenes (major), unknown pigment (minor).
  Common on rocks, bark and over mosses in coastal, monsoon and montane forest in northern N.T., eastern Qld and N.S.W. Also in Europe, North, Central and South America, Africa, Asia and the Pacific islands.  
  Elix (2009l)  

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

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