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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
Phyllopsora homosekikaica Elix

Australas. Lichenol. 59: 25 (2006)

T: Mount Spec State Forest, Paluma Ra., 6 km W of Paluma, Qld, 19°01’S, 146°09’E, on sapling in Lauraceae-Syzygium-dominated forest,18 June 1986, J.A.Elix 20241 & H.Streimann; holo: BRI; iso: CANB, HO, O.

  Thallus crustose, formed by the prothallus and by isidia developing directly from the prothallus; isidia dominating. Prothallus well developed, white to reddish brown or black. Isidia abundant, to 0.8 mm tall, 30–80 μm wide, pale to dark green, often with a brown tinge, glabrous, simple to branched or sometimes coralloid, subcylindrical, often curved, decumbent to ascending. Apothecia common, 1–2 mm wide, ±round to irregular in outline, ±conglomerate, convex, pale brown to dark cinnamon-brown, immarginate or with an indistinct or often slightly darker margin that is paler or pubescent when young. Proper exciple brown to brown-black. Epihymenium pale brown. Hypothecium reddish brown in the lower part, golden yellow above. Ascospores simple, narrowly ellipsoidal, 7–11 × 2–3 μm. Pycnidia not seen.
CHEMISTRY: Cortex and medulla K–, C–, KC+ red, P–; containing homosekikaic acid (major), hyperhomosekikaic acid (major).
  This endemic species is rare in eastern Qld; grows on the bark of trees in rainforest and coastal forest.  
  Elix (2009h)  

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

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