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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
Verrucaria hydrela Ach.
  Syn. Meth. Lich . 94 (1814). T: Europe; holo: H-ACH n.v.  
  Thallus epilithic, continuous to sparingly rimose, medium grey-green to dark green, slightly gelatinous when wetted and 20–40 (–60) µm thick. Algae subglobose to globose, 4–9 × 4–7 µm. Prothallus not apparent; black basal layer absent. Perithecia one-third immersed to superficial, 0.2–0.5 mm diam., black; apex rounded to slightly pointed; ostiole inconspicuous or in a shallow depression. Involucrellum diverging from the exciple and extending to exciple base level, 30–45 µm thick, brown-black in thin section, usually with a 15–25 µm thick thalline covering. Exciple 15–25 µm thick, usually hyaline at the base, occasionally dark brown near the ostiole. Centrum 0.13–0.25 mm wide. Periphyses 20–50 × 1–2.5 µm. Asci 58–88 × 17–25 µm. Ascospores narrowly to broadly ellipsoidal, 15–27 × 6.5–12 µm.
  One of the most common and abundant aquatic lichens in south-eastern Australia; found in coastal N.S.W. as well as the A.C.T., Vic. and Tas.; rare in south-eastern Qld. Known throughout most of central and northern Europe, it has also been reported from North America, New Guinea and New Zealand.  
  McCarthy (2001h)  

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

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