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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
Umbilicaria hirsuta (Sw. ex Westr.) Hoffm.

Deutschl. Fl. 112 (1796)

Lichen hirsutus Sw. ex Westr., Kongl. Vetensk.-Akad. Nya Handl. 14: 47 (1793); Gyrophora hirsuta (Sw. ex Westr.) Ach., Kongl. Vetensk.-Akad. Nya Handl. 15: 97 (1794).

T: Sweden; holo: H-ACH 582 n.v.

  Thallus 2–8 (–14) cm wide, orbicular, monophyllous or polyphyllous, thin but rigid; umbo obscure to moderately elevated, with or without a few soft folds; margins irregularly lacerate, the edges eroded, frequently reflexed dorsally. Upper surface dull, pale to dark grey-brown, covered with a fine network of fissures, areolate, becoming powdery-sorediate along the lobe apices; isidia absent; soredia fine, pale grey, aggregating to form irregular brown granules. Lower surface grey-brown to chestnut-brown, dark brown to black around the compact and small to moderately sized umbilicus, granular-areolate, flat to folded or wrinkled, occasionally with small pits. Rhizinomorphs sparse to moderately dense, solitary or forming small tufts, concolorous with the lower surface, cylindrical, simple or branched. Thalloconidia not seen. Apothecia and pycnidia not seen in Australian material; Hestmark (2004) reported apothecia to be rare, with narrow gyri; ascospores simple, hyaline, 10–14 × 4–8 µm.
CHEMISTRY: Chemistry: Medulla K–, C+ red, KC+ red, P–; containing gyrophoric acid (major), lecanoric acid (minor).
  A rare, subalpine species in N.S.W. and A.C.T. Also in Asia, Europe, Greenland, and North and South America.  
  Louwhoff (2009c)  

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

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