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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
Chapsa pulchra (Müll.Arg.) Mangold

in A.Mangold, J.A.Elix & H.T.Lumbsch, Fl. Australia 57: 654 (2009)

Ocellularia pulchra Müll.Arg., Nuovo Giorn. Bot. Ital. 23: 395 (1891).

T: Qld, 1889, F.M.Bailey 583; holo: G; iso: BRI “Shirley Book”, p. 21, no. 34 (AQ721219).

  Thallus usually endophloeodal, occasionally epiphloeodal, to 100 µm thick, pale grey to pale greyish green, dull, uneven, the substratum protruding, continuous, non-rimose. Cortex and pseudocortex absent. Algal layer continuous or discontinuous, poorly to moderately well developed; calcium oxalate crystals sparse to abundant, small to large, scattered or clustered. Vegetative propagules not seen. Ascomata conspicuous, to c. 2 mm diam., ±rounded to irregular, especially in fused ascomata, apothecioid or becoming chroodiscoid, erumpent, solitary or fused, often in small to large clusters, immersed. Disc partly to completely visible from above, pale flesh-coloured to greyish, usually with a distinct whitish pruina. Proper exciple not visible from above; thalline rim margin split to somewhat lacerate, lobed to eroded, rarely slightly layered, ±distinctly pruinose, whitish, becoming erect to ±recurved. Exciple fused, thin to evanescent, hyaline internally to yellowish or pale orange marginally, often incorporating substratum particles, apically usually covered with greyish to brownish grey granules, non-amyloid. Hymenium to c. 130 µm thick, conglutinated; paraphyses straight, parallel to slightly interwoven, the tips slightly thickened and somewhat irregular; lateral paraphyses conspicuous, to c. 30 µm long. Epihymenium hyaline, with coarse greyish to brownish grey granules and crystals. Asci 6–8-spored; tholus initially thick, thin when mature. Ascospores transversely septate, bacilliform to bacilliform-fusiform, often ±bent, fragile, often breaking apart in microscopic preparations, non-amyloid, 30–60 (–70) × 5–8 µm, with 12–22 (–24) locules; locules ±rounded to angular, usually with hemispherical end cells; septa thin, regular; ascospore wall thin, with a thick but indistinct hyaline halo when immature; endospore thin.
CHEMISTRY: Thallus K–, C–, P–; no compounds detectable by TLC.
  A common, corticolous endemic in rainforest and wet-sclerophyll forest in eastern Qld and north-eastern N.S.W., at altitudes to 1130 m.  
  Mangold et al. (2009)  

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

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