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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
Dibaeis absoluta (Tuck.) Kalb & Gierl
  in C.Gierl & K.Kalb, Herzogia 9: 613 (1993); Baeomyces absolutus Tuck., Amer. J. Sci. Arts, ser. 2, 28: 201 (1859). T: Moulton, Alabama, U.S.A., Mr Peters 139; holo: FH n.v., fide D.J.Galloway, Bot. Notiser 133: 80 (1980).  
  Primary thallus crustose to minutely squamulose, thin and smooth to verrucolose and scurfy, pruinose or not, continuous to areolate, dirty white to buff to green to pale yellow-green or yellowish buff with age. Apothecia solitary to clustered, sessile when young, becoming very shortly stipitate; stipe 0.3–0.5 mm tall, ±corticate, granular to ±smooth, ±pruinose, patchily lichenised basally, cream to buff to pale flesh-pink; disc flesh- to rose-pink or white with pruina, concave to plane to weakly convex or undulate as it proliferates with age; margin very pale pink to almost buff to white, thick, smooth and inrolled initially, becoming contorted and cracked to undulate and crenulate with age, usually paler than disc and visible as a distinct border on upper surface; underside of apothecia ridged and furrowed with age. Ascospores ellipsoidal to narrowly ovoid, simple or rarely 1-septate, (11–) 12–15 (–15.5) × (4–) 4.5–6.5 (–8) µm (Australian specimens). Pycnidia not seen. CHEMISTRY: Primary thallus K– or K+ pale yellow, UV+ white; apothecia (disc and stipe) K+ yellow, P+ yellow-orange; containing baeomycesic acid (major), squamatic acid (±trace), consquamatic acid (±trace, rare), barbatic acid (minor/trace, in apothecia) and ursolic acid (±trace).
  Occurs in coastal ranges of eastern Australia from north-eastern Qld to eastern Vic. and scattered in Tas.; grows on rock or soil, rarely over bryophytes, often near waterfalls. Widespread but rare in tropical to cool-temperate rainforest; also known from North, Central and South America, Japan, Philippines, Sabah, New Guinea and the South Island, New Zealand.  
  Johnston (2001b)  

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

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