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 | ||
| Peltula omphaliza (Nyl.) Wetmore | ||
| Ann. Missouri Bot. Gard. 57: 194 ('1970') [1971]; Heppia omphaliza Nyl., Bull. Torrey Bot. Club 16: 106 (1889). T: San Pedro Martin Is., Gulf of California, Mexico, 1887, Palmer; holo: H-NYL 30893. | ||
| Thallus a single peltate orbicular squamule to 2 mm diam., convex, dull greenish olive, or brown to black, anchored by a central umbilicus; margin smooth, entire to slightly lobed. Upper cortex absent; epinecral layer yellowish. Medulla composed of loosely interwoven hyphae; photobiont layer 90–120 µm thick. Lower cortex 24–36 µm thick, comprising 3–5 layers of cells. Apothecia immersed, 5–20 per squamule; disc initially punctiform, later expanded, 0.1–0.2 mm diam., yellow to yellowish brown; hymenium wine-red or blue in iodine; epihymenium K– or K+ red to red-violet. Asci clavate to obclavate. Ascospores more than 100 per ascus, ellipsoidal to bacilliform, 5–7 × 3 µm. Pycnidia immersed, globose; conidia fusiform, 2.4–3.1 × 1.2 µm. |  |
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| Occurs in W.A., N.T., S.A. and Qld; grows on acidic and calcareous rocks in desert and arid microhabitats. Also in south-western U.S.A., southern Mexico and Cape Verde Is. | ||
| Büdel (2001) | ||
| Checklist Index |
| Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References |
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